D. Rauber, T.K.F. Dier, D.A. Volmer, R. Hempelmann, Electrochemical lignin degradation in recyclable ionic liquids for production of renewable aromatic chemicals, Zeitschrift für Physikalische Chemie 232, 189-208 (2018).
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).
R. Ye, D. Henkensmeier, S.-J. Yoon, Z. Huang, D.-K. Kim, Z. Chang, S. 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]
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)
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)
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]
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
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)
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)
F. Philippi, D. Rauber, J. Zapp, R. Hempelmann, Transport properties and ionicity of phosphonium ionic liquids, Phys. Chem. Chem. Phys. 19, 23015-23023 (2017)
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)
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)
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
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)
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)
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)
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)
A. Egetenmeyer, M. Baumgärtner, D. Durneata, H. Natter, R. Hempelmann, I. Radev, V. Peinecke, Brennstoffzellenkatalysatoren auf Gasdiffusionselektroden elektrochemisch herstellen, Galvanotechnik 4, 675-684 (2016)
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)
R. Chen, R. Hempelmann, Ionic Liquid-Mediated Aqueous Redox Flow Batteries for High Voltage Applications, Electrochemistry Communications 70, 56-59 (2016)
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)
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)
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).
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)
R. Chen, R. Hempelmann, Aqueous supporting elctrolytes and redox couples for redox flow batteries (presentation), 27th ATC 2018: Industrial Inorganic Chemistry – Materials and Processes, DECHEMA-Haus, Frankfurt am Main, Feb. 22-23, 2018
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 materialsm 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 (Lecture);
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
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 (Lecture), 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);
R. Chen, Energy storage: from solid-state Li-ion batteries to liquid-phase redox flow batteries (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 (Lecture), 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 (Lecture), Bunsentagung 2016 – 115th General Assembly of the German Bunsen Society for Physical Chemistry, Rostock, Germany, May 2016.