Publications

2023

  1. Dong Hyup Jeon, Sangwon Kim, MinJoong Kim, Changsoo Lee & Hyun-Seok Cho, Oxygen bubble transport in a porous transport layer of polymer electrolyte water electrolyzer, Journal of Power Sources 553 (2023) 232322, https://doi.org/10.1016/j.jpowsour.2022.232322
     
  2. Changjong Kim, Sang Hoon Cho, Sung Min Cho, Youngseung Na, Sangwon Kim & Dong Kyu Kim, Review of hydrogen infrastructure: The currentstatus and roll-out strategy, International Journal of Hydrogen energy 48 (2023) 1701e1716, https://doi.org/10.1016/j.ijhydene.2022.10.053
     
  3. Dong Hyup Jeon, Jung-Hoon Song, Jonghyeok Yun & Jong-Won Lee, Mechanistic Insight into Wettability Enhancement of Lithium-Ion Batteries Using a Ceramic-Coated Layer, ACS Nano XXXX, XXX, XXX−XXX, https://doi.org/10.1021/acsnano.2c09526
     
  4. Allan L. L. East, Cuong M. Nguyen & Rolf Hempelmann. A 2023 Update on the Performance of Ionic-Liquid Proton-Exchange-Membrane in Fuel Cells, Frontiers in Energy Research 11:1031458 (2023). https://doi.org/10.3389/fenrg.2023.1031458
     
  5. Mohsen Lashgari, Sepideh Naseri-Moghanlou, Tohid Khanahmadlou, and Rolf Hempelmann, Electrostatic boosting of ionic dye pollutant removal from aquatic environment using a single electrode photoreactor,
    npj Clean Water 6, 10 (2023).
    https://doi.org/10.1038/s41545-023-00230-4   https://rdcu.be/c5Uvb
     
  6. D. Rauber, F. Philippi, J. Becker, J. Zapp, B. Morgenstern, B. Kuttich, T. Kraus, R. Hempelmann, P. Hunt, T. Welton & C.W.M. Kay,
    Anion and ether group influence in protic guanidinium ionic liquids,
    Physical Chemistry Chemical Physics 25, 6436-6453 (2023)
    https://doi.org/10.1039/d2cp05724g

2022

  1. Dong Hyup Jeon, Sangwon Kim, Jae-Joong Kim, Suhyun Lee, Young Je Kim, Sang-Cheol Nam, & Jung-Hoon Song, Electrochemical Performance of LBO-coated Ni-rich NCM, Journal of The Electrochemical Society, 2022 169 110533, https://doi.org/10.1149/1945-7111/aca2e1
  2. Angelo A. Severin, Daniel Rauber, Frederik Philippi, Ivan Radev, Manfred Baumgärtner, Anne Holtsch, Frank Müller, Rolf Hempelmann, Christopher W. M. Kay, P-coated carbons from phosphonium ionic liquids as catalyst support for fuel cell application, Sustainable Energy & Fuels 2022, accepted
  3. Allan L. L. East, Cuong M. Nguyen, and Rolf Hempelmann. A 2022 Update on the Use of Ionic Liquids in Fuel Cells, Frontiers in Energy Research, 2022, submitted
  4. Andreas Hofmann, Daniel Rauber, Tzu-Ming Wang, Rolf Hempelmann, Christopher W.M. Kay & Thomas Hanemann, Novel phosphonium based ionic liquid electrolytes for battery applications, Molecules 2022, 27, 4729, https://www.mdpi.com/1420-3049/27/15/4729/pdf ,  open access
  5. Zhifeng Huang, Rolf Hempelmann, Yiqiong Zhang, Shuangyin Wang, and Ruiyong Chen, Pairin g nitroxyl radical and phenazine with electron-withdrawing/-donating substituents in “water-in-ionic liquid” for high-voltage aqueous redox flow batteries, Green Energy & Environment 2022, https://doi.org/10.1016/j.gee.2022.09.005 , open access
  6. Alexander E. Khudozhitkov; Masaki Donoshita; Alexander G. Stepanov; Frederik Philippi; Daniel Rauber; Rolf Hempelmann; Hiroshi Kitagawa; Daniil I. Kolokolov, anjd Ralf Ludwig, High-temperature quantum tunneling and hydrogen bonding rearrangements characterize the solid-solid phase transitions in a phosphonium-based protic ionic liquid, Chemistry – A Euopeanj Journal 2022, 28, e202200257 (13 pages)
    https://doi.org/10.1002/chem.202200257, open access
  7. B. Yang, H. Vehoff und R. Hempelmann, The deformation behaviour of electrodeposited nanocrystalline Ni in an atomic force microscope with a newly developed in situ bending machine, International Journal of Materials Research 2022, https://doi.org/10.1515/ijmr-2006-0192
  8. Zhenzhen Wang, Xiaozhuang Zhou, Huihui Jin, Ding Che, Jiawei Zhu, Rolf Hempelmann, Lei Chen & Shichun Mu, Ionic liquid-derived FeCo Alloys Encapsulated in Nitrogen-doped Carbon Framework as Advanced Bifunctional Catalysts for Zn-Air Batteries, Journal of Alloys and Compounds 908, 164565 (2022), 10 pages, https://doi.org/10.1016/j.jallcom.2022.164565
     

2021

  1. Filippa Lundin, Henriette Wase Hansen, Karolina Adrjanowicz, Bernhard Frick, Daniel Rauber, Rolf Hempelmann, Olga Shebanova, Kristine Niss & Aleksandar Matic, Pressure and Temperature Dependence of Local Structure and Dynamics in an Ionic Liquid, J. Phys. Chem. B 125, 2719-2728, https://dx.doi.org/10.1021/acs.jpcb.1c00147
  2. Benjamin Golub, Koichi Fumino, Peter Stange, Verlaine Fossog, Rolf Hempelmann, Daniel Ondo, Dietmar Paschek, and Ralf Ludwig, Balance Between Contact and Solvent-Separated Ion-Pairs in Mixtures of the Protic Ionic Liquid [Et3NH][MeSO3] with Water Controlled by Water-Content and Temperature, J. Phys. Chem. B 125, 4476-4488 (2021), https://dx.doi.org/10.1021/acs.jpcb.1c01850
  3. Kira L. Eliasen, Henriette W. Hansen, Filippa Lundin, Daniel Rauber, Rolf Hempelmann, Tage Christensen, Tina Hecksher, Aleksandar Matic, Bernhard Frick and Kristine Niss, High frequency dynamics and test of the shoving model for the glass forming ionic liquid Pyr14-TFSI, Physical Review Materials  5, 065606 (2021), 12 pages, https://dx.doi/10.1103/PhysRevMaterials.5.065606
  4. Benjamin Golub, Koichi Fumino, Peter Stange, Verlaine Fossog, Rolf Hempelmann, Daniel Ondo, Dietmar Paschek, and Ralf Ludwig, Balance Between Contact and Solvent-Separated Ion-Pairs in Mixtures of the Protic Ionic Liquid [Et3NH][MeSO3] with Water Controlled by Water-Content and Temperature, J. Phys. Chem. B 125, 4476-4488 (2021), https://dx.doi.org/10.1021/acs.jpcb.1c01850
  5. D. Rauber, A. Hofmann, F. Philippi, C.W.M. Kay, T. Zimkevich, T. Hanemann & R. Hempelmann, Structure-Property Relation of Trimethyl Ammonium Ionic Liquids for Battery Applications, Applied Sciences 11, 5679 (2021), 24 pages, Special Issue Innovative Materials for Batteries,  https://www.mdpi.com/2076-3417/11/12/5679/pdf  https://doi.org/10.3390/app11125679
  6. D. Rauber, F. Philippi, B. Kuttich, J. Becker, T. Kraus, P. Hunt, T. Welton, R. Hempelmann and C.W.M. Kay, Curled Cation Structures Accelerate the Dynamics of Ionic Liquids, Phys.ChemChemPhys 23, 21042-21064 (2021), https://doi.org/10.1039/d1cp02889

 

2020

  1. Sang Jun Yoon, Sangwon Kim, D.K. Kim, S. So, Young Taik Hong, R. Hempelmann, Ionic Liquid derived nitrogen doped graphite felt electrodes for vanadium redox flow batteries, Carbon 166, 131-137 (2020), https://doi.org/10.1016/j.carbon.2020.05.002
  2. Sang Jun Yoon, Sangwon Kim, Dong Kyu Kim, Duk Man Yu, Rolf Hempelmann, Young Taik Hong & Soonyong So, Nitrogen−Doping Through Two−Step Pyrolysis of Polyacrylonitrile on Graphite Felts for Vanadium Redox Flow Batteries, Energy & Fuels 34, 5052-5059 (2020), https://dx.doi.org/10.1021/acs.energyfuels.0c00689
  3. G. Skorikova, D. Rauber, D. Aili, S. Martin, Q. Li, D. Henkensmeier, R. Hempelmann, Protic Ionic Liquids immobilized in phosphoric acid-doped polybenzimidazole matrix enable Polymer Electrolyte Fuel cell operation at 200°C, J. Membrane Science 608 (2020) 118188 (11 pages) https://doi.org/10.1016/j.memsci.2020.118188
  4. F. Philippi, D. Rauber, B. Kuttich, T. Kraus, C.W.M. Kay, R. Hempelmann, P.A. Hunt, T. Welton, Ether Functionalisation, Ion Conformations and the Optimisation of Macroscopic Properties in  Ionic Liquids, PhysChemChemPhys 22, 23038-23056 (2020),  https://doi.org/10.1039/D0CP03751F
  5. R. Chen, Z. Huang, R. Hempelmann, D. Henkensmeier, Sangwon Kim, Vanadium Redox Flow Batteries, in A. J. Bard, M. Stratmann (Eds.), Encyclopedia of Electrochemistry (2020), Wiley, ISBN: 9783527610426
  6. Z. Huang, C.W.M. Kay, D. Rauber, T. Kraus, H. Li, Sangwon Kim, R. Chen, An "interaction-mediated" strategy towards enhanced solubility and redox properties of organics for redodox flow batteries, Nano Energy 69, 104464 (2020), https://doi.org/10-1016/j.nanoen2020.104464
  7. Z. Huang, J. Lee, D. Henkensmeier, R. Hempelmann, S. Kim & R. Chen, Effect of Molecular Structure and Coordinating Ions on the Solubility and Electrochemical Behavior of Quinone Derivaties for Aqueous Redox Flow Batteries, Journal of The Electrochemical Society 167, 160502 (2020),
    https://doi.org/10.1149/1945-7111/abc90c
  8. Dong Kyu Kim, Sang Jun Yoon, Sangwon Kim, Transport phenomena associated with capacity loss of all-vanadium redox flow battery, International Jornal of Heat and Mass Transfer 148, 119040 (2020), https://doi.org/10.1016/j.ijheatmasstransfer.2019.119040
  9. R. Ye, D. Henkensmeier & R. Chen, Imidazolium cation enabled reversibility of hydroquinone derivative for designing aqueous redox electrolytes, Sustainable Energy Fuels 4, 2998-3005 (2020), https://doi.org/10.1039/d0se00409j
  10. R. Chen, Redox flow batteries for energy storage: Recent advances in using organic active materials, Current Opinion in Electrochemistry 21, 40-45 (2020), https://doi.org/10.1016/j.coelec.2020.01.03
  11. R. Chen, D. Bresser, M. Saraf, P. Gerlach, A. Balducci, S. Kunz, D. Schröder, S. Passerini, J. Chen, A comparative review of electrolytes for organic-material-based energy-storage devices employing solid electrodes and redox fluids, ChemSusChem 13 (2020) 2205-2219, https://doi.org/10.1002/cssc.201903382
  12. S. Haberzettl, J. Huwer, K. Bröhl & R. Hempelmann, Das Schülerlabor als Ort der Sprachentwicklung – Sprachsensibler Unterricht rund um die Süßungsmittel, Development of Language in the Schülerlabor – Language-Sensitive Teaching on the Example of Sweeteners, CHEMKON 27, 7-12 (2020), https://doi.org/10.1002/ckon.201800075

 

2019

  1. Y. Zhang, D Henkensmeier, Sangwon Kim, R. Hempelmann, R. Chen, Enhanced Reaction Kinetics of an aqueous Zn–Fe Hybrid Flow Battery by optimizing the Supporting Electrolytes, Journal of Energy Storage 25, 100883 (2019), https://doi.org/10.1016/j.est.2019.100883
  2. S.J. Yoon, Sangwon Kim, D.K. Kim, Optimization of local porosity in the electrode as an advanced channel for all-vanadium redox flow battery, Energy 172, 26-35 (2019), https://doi.org/10.1016/j.energy.2019.01.101
  3. Z. Huang, P. Zhang, X. Gao, D. Henkensmeier, S. Passerini, R. Chen, Unlocking Simultaneously the Temperature and Electrochemical Windows of Aqueous Phthalocyanine Electrolytes, ACS Appl. Energy Mater. 2, 3773-3779 (2019) DOI:10.1021/acsaem.9b00467
  4. F.S. Fedorov, M.Y. Vasilkov, M. Panov, D. Rupasov, A. Rashkovskiy, N.M. Ushakov, Jaeho Lee, R. Hempelmann, T. Kallio & A.G. Nasibulin, Tailoring electrochemical efficiency of hydrogen evolution by fine tuning of TiOx/RuOx composite cathode architecture, International Journal of Hydrogen Energy 44, 10593-10603 (2019), https://doi.org/10.1016/j.ijhydene.2019.03.019
  5. M. Etienne, J.F. Vivo-Vilches, I. Valkulko, C. Genois, L. Liu, M. Pedicakis, R. Hempelmann & A. Walcarius, Layer-by-Layer modification of graphite felt with MWCNT for vanadium redox flow battery, Electrochimica Acta, 313, 131-140 (2019), https://doi.org/10.1016/j.electacta.2019.04.022
  6. R. Chen, Toward high-voltage, energy dense and durable aqueous organic redox flow batteries: role of the supporting electrolytes, ChemElectroChem 6, 603-612 (2019), https://onlinelibrary.wiley.com/doi/abs/10.1002/celc.201801505
  7. D. Decker, R. Hempelmann, H. Natter, M. Pirrung, H. Rabe, K.H. Schäfer & M. Sauner, 3D nanostructured multielectrode arrays: fabrication, electrochemical characterization, and evaluation of cell-electrode adhesion, Advanced Materials Technologies 4, 1800436 (2019), 10 pages, https://doi.org/10.1002/admt.201800436
  8. L.A. Urtis, A. Arcifa, Z. Peng, J. Du, M. Fantauzzi, D. Rauber, R. Hempelmann, T. Kraus, A. Rossi & N.D. Spencer, Influence of water on tribolayer growth when lubricating steel with fluorinated phosphonium dicyanamide ionic Liquid, Lubricants 7, 27 (2019), 15 pages, https://onlinelibrary.wiley.com/doi/abs/10.1002/celc.201801505 , open access
  9. Z. Chang, D. Henkensmeier, R. Chen, Shifting redox potential of nitroxyl radical by introducing an imidazolium substituent and its use in aqueous flow batteries, J. Power Sources 418, 11-16 (2019) https://authors.elsevier.com/a/1YZeV1M7w0MqrE
  10. F. Philippi, D. Rauber, M. Springborg & R. Hempelmann, DFT Descriptors for Ionic Liquids and the Charge Transfer Interpretation of the Haven Ratio, J. Phys. Chem. A 123, 851-861 (2019), https://doi.org/10.1021/acs.jpca.8b10827
  11. F. Philippi, A. Quinten, D. Rauber, M. Springborg, R. Hempelmann, Density Functional Theory Desciptors for Ionic Liquids and the Introduction of a Coulomb Correction, J. Phys. Chem. A 123, 4188-4200 (2019), https://doi.org/10.1021/acs.jpca.9b01831
  12. F. Philippi, D. Rauber, J. Zapp, C. Präsang, D. Scheschkewitz & R. Hempelmann, Multiple ether-functionalized ionic liquids as highly fluid electrolytes, ChemPhysChem 20, 443-455 (2019), https://dx.doi.org/10.1002/cphc.201800939
  13. Y. Lee, S. Kim, R. Hempelmann, J.H. Jang, H.-J. Kim, J. Han, J. Kim & D. Henkensmeier, Nafion membranes with a sulfonated organic additive for the use in vanadium redox flow batteries, Journal of Applied Polymer Science 136, 46547 (2019), 10 pages, https://doi.org/10.1002/APP.47547, open access
  14. Sangwon Kim, Vanadium Redox Flow Batteries: Electrochemical Engineering, in M. Taha Demirkan and Adel Attia (Eds.), Energy Storage Devices, IntechOpen, London 2019; http://dx.doi.org/10.5772/intechopen.78502
  15. J. Geiser, H. Natter, R. Hempelmann, B. Morgenstern & K. Hegetschweiler,  Photometrical determination of the state of charge in Vanadium redox flow batteries - Part I: in combination with potentiometric titration, Z. Phys. Chem., https://doi.org/10.1515/zpch-2019-1379
  16. J. Geiser, H. Natter, R. Hempelmann, B. Morgenstern & K. Hegetschweiler,  Photometrical determination of the state of charge in Vanadium redox flow batteries - Part II: in combination with open-circuit-potential, Z. Phys. Chem., https://doi.org/10.1515/zpch-2019-1380
  17. W. Munief, X. Lu, T. Teucke, Y. Lang, F. Hempel, J. Law, R. Lanche, A. Britz, R. Lilischkies, D. Cassel, M. Schwartz, F. Mueller, S. Grandthyll, J. Neurohr, K. Jacob, V. Pachauri, M. Schmitt,  R. Hempelmann & S. Ingebrandt, Reduced graphene oxide biosensors platform for the detection of NT-proBNP biomarker in its clinical range, Biosensors and Bioelectronics 126, 136-142 (2019), https://doi.org/10.1016/j.bios.2018.09.102
  18. D. Rauber, F. Philippi, J. Seibert, J. Huwer, H. Natter & Rolf Hempelmann, From Current Science to School – the Facets of Green Chemistry on the Example of Ionic Liquids, World Journal of Chemical Education 7,153-165 (2019), http://pubs.sciepub.com/wjce/7/2/15 , open access
  19. D. Rauber & R. Hempelmann, Ionische Flüssigkeiten – Nachhaltige Technologien mit geschmolzenen Salzen?, MINT Zirkel, Volume September 2019, page 6

 

2018

  1. D. Rauber, F. Philippi, J. Zapp, G. Kickelbick, H. Natter & R. Hempelmann, Transport properties of protic and aprotic guanidinium ionic liquids, RSC Advances 8, 41639-41650 (2018), https://doi.org/10.1039/c8ra07412g, open access
  2. D. Decker, H. Natter, R. Hempelmann, M. Pirrung, K.-H. Schäfer, H. Rabe, M. Saumer, 3D nanostructured multielectrode arrays:  fabrication, characterization and evaluation of cell-electrode adhesion, Advanced Materials Technologies 3, 1800436 (2018), https://doi.org/10.1002/admt.201800436
  3. X. Lu, W.-M. Munief, F. Heib, M. Schmitt, A. Britz, S. Grandthyl, F. Müller, J.-U. Neurohr, K. Jacobs, H.M. Benia, R. Lanche, V. Pachauri, R. Hempelmann & S. Ingebrandt, Front-end-of-line integration of Graphite mesh for Graphene based electrical platforms, Adv. Mater. Technologies 3, 1700318 (2018), https://doi.org/10.1002/admt.201700318
  4. R. Chen, D. Henkensmeier, S. Kim, S. J. Yoon, T. Zinkevich, S. Indris, Improved all-vanadium redox flow batteries using catholyte additive and a crosslinked methylated PBI membrane, ACS Applied Energy Materials 1, 6047-6055 (2018), DOI: 10.1021/acsaem.8b01116
  5. A.Tatlisu, Z. Huang, R. Chen, High-Voltage and Low-Temperature Aqueous Supercapacitor Enabled by “Water-in-Imidazolium Chloride” Electrolytes, ChemSusChem 11, 3899-3904 (2018), DOI: 10.1002/cssc.201802046
  6. A. Konovalova, H. Kim, Sangwon Kim, A. Lim, H.S. Park, M.R. Kraglund, D. Aili, J.H. Jang, H.-J. Kim & D. Henkensmeier, Blend membranes of polybenzimidazole and an anion exchange ionomer (FAA3) for alkaline water electrolysis: Improved alkaline stability and conductivity, Journal of Membrane Science 654, 653-662 (2018) https://doi.org/10.1016/j.memsci.2018.07.074
  7. G. Hwang, Sangwon Kim, D. In, D. Lee, C. Ryu, Application of the commercial ion exchange membranes in the all-vanadium redox flow battery, Journal of Industrial and Engineering Chemistry 60, 360-365 (April, 2018), https://doi.org/10.1016/j.jiec.2017.11.023 
  8. D. Kim, S.J. Yoon, J. Lee, Sangwon Kim, Parametric study and flow rate optimization of all-vanadium redox flow batteries, Applied Energy, accepted, https://doi.org/10.1016/j.apenergy.2018.06.094 
  9. M. Jung, W. Lee, N.N. Krishan, Sangwon Kim, G. Gupta, L. Komsyska, C. Harms, Y. Kwon & D. Henkensmeier, Porous-Nafion/PBI composite membranes and Nafion/PBI blend membranes for vanadium redox flow batteries, Applied Surface Science 450, 301-311 (2018), https://doi.org/10.1016/j.apsusc.2018.04.198
  10. M. Weber, F. Arena, A. Konrad & R. Hempelmann, Effect of moisture on methane permeation through fermenter covering films in biogas plants, Z. Phys. Chem. 232, 603-614 (2018), https://doi.org/10.1515/zpch-2017-1022
  11. D. Rauber, F. Heib, M. Schmitt & R. Hempelmann, Trioctylphosphonium room temperature ionic liquids with perfluorinated groups - physical properties and surface behavior in comparison with the nonfluorinated analogues, Colloids and Surfaces A: Physicochemical and Engineering Aspects 537, 116-125 (2018), https://doi.org/10.1016/j.colsurfa.2017.10.013
  12. D. Rauber, T.K.F. Dier, D.A. Volmer, R. Hempelmann, Electrochemical lignin degradation in recyclable ionic liquids for production of renewable aromatic chemicals, Z. Phys. Chem. 232, 189-208 (2018), https://doi.org/10.1515/zpch-2017-0951
  13. Y. Zhang, R. Ye, D. Henkensmeier, R. Hempelmann, R. Chen, “Water-in-ionic liquid” solutions towards wide electrochemical stability windows for aqueous rechargeable batteries, Electrochimica Acta 263, 47-52 (2018), DOI: 10.1016/j.electacta.2018.01.050
  14. R. Ye, D. Henkensmeier, S.-J. Yoon, Z. Huang, D.-K. Kim, Z. Chang, Sangwon Kim, R. Chen, Redox flow batteries for energy storage: a technology review, Journal of Electrochemical Energy Conversion and Storage 15, 010801 (2018). [Invited Review Paper] https://doi.org/10.1115/1.4037248

 

2017

  1. Z. Chang, D. Henkensmeier, R. Chen, One-step cationic grafting of 4-hydroxy-TEMPO and its application in a hybrid redox flow battery with a crosslinked PBI membrane, ChemSusChem 10, 3193-3197 (2017), http://doi.org/10.1002/cssc.201701060
  2. I. Strużyńska-Pirona, M. Jung, Ar. Maljuschc, O. Conradic, S. Kim, J. Jang, H. Kim, Y. Kwon, S. Nam, D. Henkensmeier, Imidazole based ionenes, their blends with PBI-OO and applicability as membrane in a vanadium redox flow battery, Eur. Polym. J. 96, 383-392 (2017), https://doi.org/10.1016/j.eurpolymj.2017.09.031
  3. H. Zhang, C. Mao, J. Li, R. Chen, Advances in electrode materials for Li-based rechargeable batteries, RSC Advances 7, 33789-33811 (2017). [open access], https://doi.org/10.1039/c7ra04370h
  4. R. Chen, S. Kim, Z. Chang, Chapter: “Redox flow batteries: fundamentals and applications”, Redox: Principles and Advance Applications, Edited by M.A.A. Khalid, 2017, ISBN 978-953-51-5421-1, Publisher: InTech, pp. 103-118. [open access] http://www.intechopen.com/articles/show/title/redox-flow-batteries-fundamentals-and-applications
  5. D. Rauber, P. Zhang, V. Huch, T. Kraus, R. Hempelmann, Lamellar structures in fluorinated phosphonium ionic liquids: the roles of fluorination and chain length, Phys. Chem. Chem. Phys. 19, 27251 (2017), https://doi.org/10.1039/C7CP04814A
  6. D. Rauber, F. Heib, T. Dier, D.A. Volmer, R. Hempelmann, M. Schmitt, On the physicochemical and surface properties of 1-alkyl 3-methylimidazolium bis(nonafluorobutylsulfonyl)imide ionic liquids, Colloids and Surfaces A - Physicochemical and Engineering Aspects 529, 169-177 (2017), https://doi.org/10.1016/j.colsurfa.2017.05.092
  7. F. Philippi, D. Rauber, J. Zapp, R. Hempelmann, Transport properties and ionicity of phosphonium ionic liquids, Phys. Chem. Chem. Phys. 19, 23015-23023 (2017), https://doi.org/10.1039/C7CP04552B
  8. D. Rauber, F. Philippi, R. Hempelmann, Catalyst retention utilizing a novel fluorinated phosphonium ionic liquid in Heck reactions under fluorous biphasic conditions, Journal of Fluorine Chemistry 200, 115-122 (2017), https://doi.org/10.1016/j.jfluchem.2017.06.014
  9. T.K.F. Dier, D. Rauber, D. Durneata, R. Hempelmann, D.A. Volmer, Sustainable Electrochemical Depolymerisation of Lignin in Reusable Ionic Liquids, Scientific Reports 7, 5041 (2017), https://doi.org/10.1038/s41598-017-05316-x
  10. R. Hempelmann, H. Natter, Nanostructured Metals and Alloys Deposited from Ionic Liquids, in F. Endres, A. Abbott, D. MacFarlande, Electrodeposition from Ionic Liquids, Wiley-VCH, Weinheim 2017, page 253-278, ISBN 978-3-527-33602-9
  11. A. Egetenmeyer, I Radev, D. Durneata, M. Baumgärtner, V. Peinecke, H. Natter, R. Hempelmann, Pulse Electrodeposited Cathode Catalyst Layers for PEM Fuel Cells, International Journal of Hydrogen Energy 42, 13649-13660 (2017), https://doi.org/10.1016/j.ijhydene.2017.01.12
  12. A. Egetenmeyer, M. Baumgärtner, T. Linck, D. Durneata, H. Natter, R. Hempelmann, I. Radev, V. Peinecke, Pulse electrodeposition of catalyst nanoparticles for application in PEM fuel cells, Transactions of the Institute of Metal Finishing 95, 9-19 (2017), https://doi.org/10.1080/00202967.2017.1253661
  13. E.-J. Oh, R. Hempelmann, V. Nica, I. Radev, H. Natter, Coating procedure for chemical and morphological functionalization of multilayer-graphene foams, Carbon 121, 170-180 (2017), https://doi.org/10.1016/j.carbon.2017.05.058
  14. E.-J. Oh, R. Hempelmann, V. Nica, I. Radev, H. Natter, New catalyst supports by surface modification of graphene- and carbon nanotube structures with nitrogen containing carbon coating, Journal of Power Sources 341, 240-249 (2017), https://doi.otrg/j.jpowsour.2016.11.116

 

2016

  1. A. Egetenmeyer, M. Baumgärtner, D. Durneata, H. Natter, R. Hempelmann, I. Radev, V. Peinecke, Brennstoffzellenkatalysatoren auf Gasdiffusionselektroden elektrochemisch herstellen, Galvanotechnik 4, 675-684 (2016)
  2. D. Rauber, F. Heib, M. Schmitt, R. Hempelmann, Influence of perfluoroalkyl-chains on the surface properties of 1-methylimidazolium bis(trifluoromethanesulfonyl)imide ionic liquids, Journal of Molecular Liquids 216, 246-258 (2016)
  3. R. Chen, R. Hempelmann, Ionic Liquid-Mediated Aqueous Redox Flow Batteries for High Voltage Applications, Electrochemistry Communications 70, 56-59 (2016)
  4. R. Chen, S. Ren, X. Mu, E. Maawad, S. Zander, R. Hempelmann, H. Hahn, High-performance low temperature Li+ intercalation in disordered rock-salt Li-Cr-V oxyfluorides, ChemElectroChem 3, 892-895 (2016)
  5. R. Chen, E. Maawad, M. Knapp, S. Ren, P. Beran, R. Witter, R. Hempelmann, Lithiation-driven structural transition of VO2F into disordered rock-salt LixVO2F, RSC Adv. 6, 65112-65118 (2016)
  6. R. Chen, R. Witte, R. Heinzmann, S. Ren, S. Mangold, H. Hahn, R. Hempelmann, H. Ehrenberg, S. Indris, Identifying the redox activity of cation-disordered Li-Fe-V-Ti oxide cathodes for Li-ion batteries, Phys. Chem. Chem. Phys. 18, 7695 (2016).
  7. G. Barbieri, A. Brunetti, M.L. Di Vona, E. Sgreccia, P. Knauth, H.Y. Hou, R. Hempelmann, F. Arena, L.D. Beretta, B. Bauer, M. Schuster, J.O. Ossó, L.F. Vega, LoLiPEM: Long life proton exchange membrane fuel cells, International Journal of Hydrogen Energy 41, 1921-1934 (2016)

 

Recent Conference Contributions

2020

Due to the Corona restrictions face-to-face conferences did not take place in 2020. Therefore there are no conference contributions of TSE in 2020

2019

G. Skorikova, D. Rauber, R. Hempelmann, Immobilized Ionic Liquids in HT-PEM Fuel Cells (oral presentation), 5th International Conference on Advanced Electromaterials, Jeju-si, Korea, November 5-8, 2019

J. Geiser, B. Morgenstern, K. Hegetschweiler, R. Hempelmann, State-of-Charge Monitoring for the Vanadium Redox Flow Battery (oral presentation), GDCh-Wissenschaftsforum, Aachen Sept. 15-18, 2019 

D. Rauber, F. Philippi, R. Hempelmann, Boosting Transport Properties of Phosphonium and Guanidinium Ionic Liquids (oral presentation), 70th Annual Meeting of the International Society of Electrochemistry, Durban, South Africa, August 4-9, 2019

G. Skorikova, R. Hempelmann, Immobilized Ionic Liquids in HT-PEM Fuel Cells (oral presentation), International Conference on Hydrogen Production, Cluj, Romania, May 15-17, 2019

R. Chen, Z. Huang, P. Zhang, D. Henkensmeier, R. Hempelmann, Ionic liquids-promoted utilization of redox-active organic materials for flow batteries (oral presentation), Electrochemical Conference on Energy and the Environment (ECEE 2019), Glasgow, Scotland, July 21-26, 2019

R. Chen, D. Henkensmeier, New Electrolytes for RFBs and Compatible PBI Anion Exchange Membrane (invited talk), Workshop on Ion Exchange Membranes for Energy Applications (EMEA) 2019, Bad Zwischenahn, June 25-27, 2019

R. Chen, Z. Huang, Y. Zhang, R. Hempelmann, Utilizing ionic liquids for redox flow batteries (oral presentation), Bunsentagung 2019 - 118th General Assembly of the German Bunsen Society for Physical Chemistry, Jena, May 30 - June 1, 2019

R. Chen, Z. Huang, R. Hempelmann, “Water-in-Ionic Liquids” Promoted Utilization of Redox-Active Organic Materials for Flow Batteries, poster at the Organic Battery Days 2019, Jena, June 3-5, 2019

Z. Huang, R. Hempelmann, R. Chen, Aqueous electrolyte with broad electrochemical and temperature stability window for redox flow battery, Poster at the Bunsentagung 2019 - 118th General Assembly of the German Bunsen Society for Physical Chemistry, Jena, May 30 - June 1, 2019

 

2018

D. Henkensmeier, S. Kim, R. Chen, Y. Kwon, Membranes for redox flow batteries, 2018 MRS Fall Meeting & Exhibit, Boston, USA, Nov. 25-30, 2018

F. Philippi, D. Rauber, R. Hempelmann, Tuning Phosphonium Ionic Liquids with Ether Chains (flash oral presentation), EuCheMSIL Lisbon, Portugal, Oct. 08-12, 2018

R. Chen, Y. Zhang, R. Hempelmann, Aqueous Ionic Liquids as Supporting Electrolytes for Redox Flow Batteries (oral presentation), 6th International conference on Ionic Liquids for Electrochemical Devices (ILED-6), Rome, Italy, September 9-11, 2018

R. Hempelmann, J. Geiser, B. Morgenstern, K. Hegetschweiler, State-of-Charge Monitoring of the Vanadium Redox Flow Battery (invited oral presentation), 69th Annual Meeting of the International Society of Electrochemistry, Bologna (Italy), September 2-7, 2018

R. Hempelmann, State-of-Charge Monitoring of the Vanadium Redox Flow Battery (keynote lecture), THERMEC´2018 Int. Conf. on Processing and Manufacturing of Advanced Materials, Paris, July 8-13, 2018

G. Skorikova, R. Hempelmann, The synergy effect of ionic liquids impregnated into PBI matrices with a phosphoric acid post-treatment (poster), Euromembrane 2018, Valencia, Juli 9-13, 2018

R. Chen, D. Henkensmeier, S. Kim, Improved vanadium redox flow battery using catholyte additives and a PBI membrane (oral presentation), Workshop on Ion Exchange Membranes for Energy Applications, Bad Zwischenahn, June 26-28, 2018

A. Jung, H. Natter, R. Hempelmann, Electroplating of complex porous 3D materials: mass flow limitation and properties of nanocrystalline coated metal foams (oral presentation), ElecNano - Electrochemistry for Nano & Nano for Electrochemistry, May 29-31, Nancy (France)

R. Chen, Z. Huang, Z. Chang, R. Ye, R. Hempelmann, Redox active organic molecules for flow batteries (Lecture);
Z. Huang, R. Hempelmann, R. Chen, Organic electroactive materials with high loading fraction for semi-solid redox flow batteries (Poster)
Y. Zhang, R. Hempelmann, R. Chen, "Water-in-ionic liquid" electrolytes boost aqueous high-voltage rechargeable battery (Poster);
S.J. Yoon, Y.T. Hong, S. Kim, R. Hempelmann, Zirconium phosphate composite membrane for vanadium redox flow battery (Poster);
Bunsentagung 2018, Hannover

B. Groß, S. Schulte, J. Langner, I. Derr, D. Görges, T. Lepold, J. Geiser, K. Weißhaar H. Natter, R. Hempelmann, Photovoltaik + Vanadium-Redox-Flow-Batterie: Autarke, regenerativ betriebene Stromparkplätze (Poster), Jahrestreffen der Processnet-Fachgruppe Energieverfahrenstechnik, DECHEMA-Haus, Frankfurt am Main, March 7-8, 2018

R. Chen, R. Hempelmann, Aqueous supporting elctrolytes and redox couples for redox flow batteries, oral presentation at 27th ATC 2018: Industrial Inorganic Chemistry – Materials and Processes, DECHEMA-Haus, Frankfurt am Main, Feb. 22-23, 2018
 

2017

R. Hempelmann, Hierarchical structured foams of porous nitrogen-doped carbon for PEM fuel cells (Key note lecture), EUROMAT 2017, Thessaloniki, Greece, Sept. 17-11, 2017

J. Geiser, H. Natter, R. Hempelmann, Investigation on an improved state-of-charge indicator for the all-vanadium redox flow battery (Poster);
K. Weisshaar, H. Natter, R. Hempelmann, Characterisation and improvement of the active materials of the vanadium redox flow battery (Poster);
Annual meeting of the FG Electrochemistry at the GDCh-Wissenschaftsforum, Berlin, Sept. 11-15, 2017

R. Chen, High voltage aqueous redox flow batteries, Invited Presentation at the 3rd International Conference on Electrochemistry, Berlin, July 10-11, 2017

R. Chen, Z. Chang, Ionic modification of TEMPO and its application in a hybrid TEMPO/Zn redox flow battery, Presentation at the “Organic Battery Days”, Uppsala, Sweden, June 8-9, 2017

R. Chen, Z. Huang, Y. Zhang, R. Hempelmann, High Voltage Aqueous Redox Flow Batteries Using Ionic Liquids (presentation);
D. Rauber, F. Philippi, R. Hempelmann, Ionicity of Ionic Liquids determined by PFG-STE NMR (Poster);
G. Skorikova, R. Hempelmann, Immobilization of ionic liquids in PBI framework for HT-PEMFC applications (Poster);
K. Weisshaar, H. Natter, R. Hempelmann, Characterization and improvement of the active materials in the vanadium redox flow battery (Poster);
J. Geiser, H. Natter, R. Hempelmann, Investigations on an improved state-of-charge indicator for the all-vanadium redox flow battery (Poster);
Z. Huang, R. Hempelmann, R. Chen, Anion intercalation electrode for high-voltage semi-solid flow batteries (Poster);
Y. Zhang, R. Hempelmann, R. Chen, Ionic liquid based aqueous electrolytes for redox flow battery (Poster);
116th General Assembly of the German Bunsen Society for Physical Chemistry, Kaiserslautern, Germany, May 2017

Z. Chang, Z. Huang, R. Hempelmann, R. Chen, Redox active solution/suspension for flow batteries (Poster), 13th Zsigmondy Colloquium of the German Colloid Society, Saarbrücken, April 2017

D.K. Kim, S.J. Yoon, J. Lee, S. Kim, Investigation of mass transport through Nafion 115 in the vanadium redox flow battery (Lecture), 14th Symp. Fuel Cell and Battery Modelling and Experimental Validation - Modval 14, Karlsruhe, March 2017

R. Chen, R. Hempelmann, High intercalation level of lithium in disordered rock-salt inorganic Materials (Poster), 26th ATC 2017: Industrial Inorganic Chemistry - Materials and Processes, Frankfurt, February 2017

E.-J. Oh, G. Skorikova, H. Natter, R. Hempelmann, Three-dimensional porous architecture of graphene / CNT composites in PEM fuel cells (Lecture), 7th Int. Conf. Fundamentals & Developments of Fuel Cells, Stuttgart, January 2017
 

2016

S.W. Kim (Lecture), Energy storage for energy transition;
R. Hempelmann (Lecture), The fuel cell market ion Germany and the fuel cell research at KIST Europe;
ENGINEERING for our FUTURE, ADeKo Joint Korean German Conference, Dresden, November 2016

R. Chen, R. Hempelmannm (presentation), Aqueous ionic liquid electrolyte for high voltage redox flow batteries, GDCh Electrochemistry, Goslar, September 2016

R. Chen, M. Knapp, E. Maawad, S. Zander, P. Beran, R. Hempelmann, Electrochemistry driven structural transition of VO2F into disordered rock-salt (Poster);
R. Chen, R. Hempelmann (Poster), Ionic liquids-mediated aqueous electrolytes for redox flow batteries ;
67th Annual Meeting of the International Society of Electrochemistry, The Hague, The Netherlands, August 2016

J. Lee, Barriers for reduction of gas phase carbon dioxide in PEM architecture (Lecture);
KIST Europe Workshop: Sustainable – Electrochemistry, Saarbrücken, June 2016

S. W. Kim, J. Lee, R. Chen, R. Hempelmann, Development of Energy storage at KIST Europe (Invited Lecture), Italian – Korean Summer School 2016, Naples, Italy, June 2016

R. Chen, R. Hempelmann, Ionic liquid-mediated aqueous electrolytes for redox flow batteries (presentation), 7th International Flow Battery Forum (IFBF) 2016, Karlsruhe, Germany, June 2016.

S. W. Kim, D. Henkensmeier, N. Jo, L. Komsiyska, G. Gupta, Application of Nafion/polybenzimidazole blend membranes to vanadium flow batteries (Poster),  7th International Flow Battery Forum (IFBF) 2016, Karlsruhe, Germany, June 2016.

R. Chen, Intercalation chemistry and solid-state cathode materials for lithium-ion batteries, Inorganic Chemistry Colloquium 2016 - Saarland University, Saarbrücken, Germany, June 2016.

S. W. Kim, D. Henkensmeier, N. Jo, L. Komsiyska, G. Gupta, Vanadium redox flow battery performance improvement (Lecture), New concept in Energy Transformation and Energy Storage, Saarbrücken, Germany, May 2016.

R. Chen, R. Hempelmann, E. Maawad, M. Yavuz, M. Knapp, S. Zander, Structural insights into charged Li2-xMO2F by synchrotron X-ray PDF and XANES (presentation), Bunsentagung 2016 – 115th General Assembly of the German Bunsen Society for Physical Chemistry, Rostock, Germany, May 2016.

 

 

 

 

 



 

 


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