Hausbrand, René ; Cherkashinin, Gennady ; Ehrenberg, Helmut ; Gröting, Melanie ; Albe, Karsten ; Hess, Christian ; Jaegermann, Wolfram (2015)
Fundamental degradation mechanisms of layered oxide Li-ion battery cathode materials: Methodology, insights and novel approaches.
In: Materials Science and Engineering: B, 192
doi: 10.1016/j.mseb.2014.11.014
Artikel, Bibliographie

Kızıltaş-Yavuz, Nilüfer ; Herklotz, Markus ; Hashem, Ahmed M. ; Abuzeid, Hanaa M. ; Schwarz, Björn ; Ehrenberg, Helmut ; Mauger, Alain ; Julien, Christian M. (2013)
Synthesis, structural, magnetic and electrochemical properties of LiNi1/3Mn1/3Co1/3O2 prepared by a sol–gel method using table sugar as chelating agent.
In: Electrochimica Acta, 113
doi: 10.1016/j.electacta.2013.09.065
Artikel, Bibliographie

Bie, Xiaofei ; Du, Fei ; Wang, Yuhui ; Zhu, Kai ; Ehrenberg, Helmut ; Nikolowski, Kristian ; Wang, Chunzhong ; Chen, Gang ; Wei, Yingjin (2013)
Relationships between the crystal/interfacial properties and electrochemical performance of LiNi0.33Co0.33Mn0.33O2 in the voltage window of 2.5–4.6V.
In: Electrochimica Acta, 97
doi: 10.1016/j.electacta.2013.02.131
Artikel, Bibliographie

Cherkashinin, Gennady ; Nikolowski, Kristian ; Ehrenberg, Helmut ; Jacke, Susanne ; Dimesso, Lucangelo ; Jaegermann, Wolfram (2012)
The stability of the SEI layer, surface composition and the oxidation state of transition metals at the electrolyte-cathode interface impacted by the electrochemical cycling: X-ray photoelectron spectroscopy investigation.
In: Physical Chemistry Chemical Physics, 14 (35)
doi: 10.1039/C2CP41134B
Artikel, Bibliographie

Hashem, A. M. ; Abuzeid, H. M. ; Mikhailova, D. ; Ehrenberg, H. ; Mauger, A. ; Julien, C. M. (2012)
Structural and electrochemical properties of α-MnO2 doped with cobalt.
In: Journal of Materials Science, 47 (5)
doi: 10.1007/s10853-011-6071-x
Artikel, Bibliographie

Hashem, Ahmed M. ; Abuzeid, Hanaa M. ; Narayanan, N. ; Ehrenberg, Helmut ; Julien, C. M. (2011)
Synthesis, structure, magnetic, electrical and electrochemical properties of Al, Cu and Mg doped MnO2.
In: Materials Chemistry and Physics, 130 (1-2)
doi: 10.1016/j.matchemphys.2011.04.074
Artikel, Bibliographie

Hashem, Ahmed M. ; Abdel-Latif, A. M. ; Abuzeid, Hanaa M. ; Abbas, H. M. ; Ehrenberg, Helmut ; Farag, R. S. ; Mauger, A. ; Julien, C. M. (2011)
Improvement of the electrochemical performance of nanosized α-MnO2 used as cathode material for Li-batteries by Sn-doping.
In: Journal of Alloys and Compounds, 509 (40)
doi: 10.1016/j.jallcom.2011.07.075
Artikel, Bibliographie

Mikhailova, Daria ; Bramnik, Natalia N. ; Bramnik, Kirill G. ; Reichel, P. ; Oswald, S. ; Senyshyn, A. ; Trots, D. M. ; Ehrenberg, Helmut (2011)
Layered LixMoO2Phases with Different Composition for Electrochemical Application: Structural Considerations.
In: Chemistry of Materials, 23 (15)
doi: 10.1021/cm2010715
Artikel, Bibliographie

Jakes, Peter ; Erdem, Emre ; Ozarowski, Andrew ; Van Tol, Johan ; Buckan, Ronny ; Mikhailova, Daria ; Ehrenberg, Helmut ; Eichel, Rüdiger-A. (2011)
Local coordination of Fe3+ in Li[Co0.98Fe0.02]O2 as cathode material for lithium ion batteries—multi-frequency EPR and Monte-Carlo Newman-superposition model analysis.
In: Physical Chemistry Chemical Physics, 13 (20)
doi: 10.1039/C0CP02048F
Artikel, Bibliographie

Abuzeid, Hanaa M. ; Hashem, Ahmed M. ; Narayanan, N. ; Ehrenberg, Helmut ; Julien, C. M. (2011)
Nanosized silver-coated and doped manganese dioxide for rechargeable lithium batteries.
In: Solid State Ionics, 182 (1)
doi: 10.1016/j.ssi.20https://doi.org/10.11.023
Artikel, Bibliographie

Saadoune, Ismael ; Labrini, Mohamed ; Yahya, Mustapha ; Almaggoussi, Abdelmajid ; Ehrenberg, Helmut (2010)
LiNi0.1Mn0.1Co0.8O2 electrode material: Structural changes upon lithium electrochemical extraction.
In: Electrochimica Acta, 55 (18)
doi: 10.1016/j.electacta.2010.04.033
Artikel, Bibliographie

Gonzalo, E. C. ; Morán, E. ; Parada, C. ; Ehrenberg, Helmut (2010)
Microwave-assisted synthesis of LiCoO2 and LiCo1−xGaxO2: Structural features, magnetism and electrochemical characterization.
In: Materials Chemistry and Physics, 121 (3)
doi: 10.1016/j.matchemphys.2010.02.011
Artikel, Bibliographie

Hashem, Ahmed M. ; Abuzeid, Hanaa M. ; Nikolowski, Kristian ; Ehrenberg, Helmut (2010)
Table sugar as preparation and carbon coating reagent for facile synthesis and coating of rod-shaped MnO2.
In: Journal of Alloys and Compounds, 497 (1-2)
doi: 10.1016/j.jallcom.2010.03.039
Artikel, Bibliographie

Hashem, Ahmed M. ; Abdel Ghany, Ashraf E. ; Nikolowski, Kristian ; Ehrenberg, Helmut (2010)
Effect of carbon coating process on the structure and electrochemical performance of LiNi0.5Mn0.5O2 used as cathode in Li-ion batteries.
In: Ionics, 16 (4)
doi: 10.1007/s11581-009-0403-8
Artikel, Bibliographie

Wei, Y. J. ; Nikolowski, Kristian ; Zhang, Shan-Tao ; Ehrenberg, Helmut ; Oswald, S. ; Chen, G. ; Wang, C. Z. ; Chen, H. (2009)
Electrochemical kinetics and cycling performance of nano Li[Li0.23Co0.3Mn0.47]O2 cathode material for lithium ion batteries.
In: Electrochemistry Communications, 11 (10)
doi: 10.1016/j.elecom.2009.08.040
Artikel, Bibliographie

Oswald, S. ; Nikolowski, Kristian ; Ehrenberg, Helmut (2009)
Quasi in situ XPS investigations on intercalation mechanisms in Li-ion battery materials.
In: Analytical and Bioanalytical Chemistry, 393 (8)
doi: 10.1007/s00216-008-2520-z
Artikel, Bibliographie

Laubach, Sonja ; Laubach, Stefan ; Schmidt, Peter C. ; Ensling, David ; Schmid, Stefan ; Jaegermann, Wolfram ; Thißen, Andreas ; Nikolowski, Kristian ; Ehrenberg, Helmut (2009)
Changes in the crystal and electronic structure of LiCoO2 and LiNiO2 upon Li intercalation and de-intercalation.
In: Physical Chemistry Chemical Physics, 11 (17)
doi: 10.1039/b901200a
Artikel, Bibliographie

Wei, Y. J. ; Ehrenberg, Helmut ; Kim, K. B. ; Park, C. B. ; Huang, Z. F. ; Baehtz, Carsten (2009)
Characterizations on the structural and electronic properties of thermal lithiated Li0.33MnO2.
In: Journal of Alloys and Compounds, 470 (1-2)
doi: 10.1016/j.jallcom.2008.02.036
Artikel, Bibliographie

Bhuvaneswari, M. S. ; Bramnik, N. N. ; Ensling, D. ; Ehrenberg, H. ; Jaegermann, W. (2008)
Synthesis and characterization of Carbon Nano Fiber/LiFePO4 composites for Li-ion batteries.
In: Journal of Power Sources, 180 (1)
doi: 10.1016/j.jpowsour.2008.01.090
Artikel, Bibliographie

Li, X. ; Wei, Y. J. ; Ehrenberg, Helmut ; Du, F. ; Wang, C. Z. ; Chen, G. (2008)
Characterizations on the structural and electrochemical properties of LiNi1/3Mn1/3Co1/3O2 prepared by a wet-chemical process.
In: Solid State Ionics, 178 (39-40)
doi: 10.1016/j.ssi.2008.01.048
Artikel, Bibliographie

Zhang, Shan-Tao ; Kounga, Alain Brice ; Aulbach, Emil ; Jo, Wook ; Granzow, Torsten ; Ehrenberg, Helmut ; Rödel, Jürgen (2008)
Lead-free piezoceramics with giant strain in the system Bi[sub 0.5]Na[sub 0.5]TiO[sub 3]–BaTiO[sub 3]–K[sub 0.5]Na[sub 0.5]NbO[sub 3]. II. Temperature dependent properties.
In: Journal of Applied Physics, 103 (3)
doi: 10.1063/1.2838476
Artikel, Bibliographie

Zhang, Shan-Tao ; Kounga, Alain Brice ; Aulbach, Emil ; Ehrenberg, Helmut ; Rödel, Jürgen (2007)
Giant strain in lead-free piezoceramics Bi[sub 0.5]Na[sub 0.5]TiO[sub 3]–BaTiO[sub 3]–K[sub 0.5]Na[sub 0.5]NbO[sub 3] system.
In: Applied Physics Letters, 91 (11)
doi: 10.1063/1.2783200
Artikel, Bibliographie

Wei, Y. J. ; Ehrenberg, Helmut ; Bramnik, Natalia N. ; Nikolowski, Kristian ; Baehtz, Carsten ; Fuess, Hartmut (2007)
In situ synchrotron diffraction study of high temperature prepared orthorhombic LiMnO2.
In: Solid State Ionics, 178 (3-4)
doi: 10.1016/j.ssi.2006.11.018
Artikel, Bibliographie

Nikolowski, Kristian ; Baehtz, Carsten ; Bramnik, Natalia N. ; Ehrenberg, Helmut (2005)
A Swagelok-type in situ cell for battery investigations using synchrotron radiation.
In: Journal of Applied Crystallography, 38 (5)
doi: 10.1107/S0021889805022302
Artikel, Bibliographie

Ehrenberg, Helmut ; Nikolowski, Kristian ; Bramnik, Natalia N. ; Baehtz, Carsten ; Buhrmester, Thorsten ; Gross, Toni André (2005)
Conditioning of Li(Ni,Co)O2 Cathode Materials for Rechargeable Batteries During the First Charge-Discharge Cycles.
In: Advanced Engineering Materials, 7 (10)
doi: 10.1002/adem.200500116
Artikel, Bibliographie

Nikolowski, Kristian M. ; Bramnik, Natalia N. ; Baehtz, Christian ; Ehrenberg, Helmut ; Fuess, Hartmut (2005)
In Situ XRD of Highly Charged and Discharged Li<em>x</em>Ni0.8Co0.2O2 (<em>x</em> close to 0).
In: Rechargeable Lithium and Lithium-Ion Batteries Editor(s): J. Weidner, 1 (26)
Artikel, Bibliographie

Bramnik, Natalia N. ; Bramnik, Kirill G. ; Baehtz, Carsten ; Ehrenberg, Helmut (2005)
Study of the effect of different synthesis routes on Li extraction–insertion from LiCoPO4.
In: Journal of Power Sources, 145 (1)
doi: 10.1016/j.jpowsour.2004.12.036
Artikel, Bibliographie

Bramnik, Natalia N. ; Bramnik, Kirill G. ; Nikolowski, Kristian ; Hinterstein, Manuel ; Baehtz, Carsten ; Ehrenberg, Helmut (2005)
Synchrotron Diffraction Study of Lithium Extraction from LiMn[sub 0.6]Fe[sub 0.4]PO[sub 4].
In: Electrochemical and Solid-State Letters, 8 (8)
doi: 10.1149/1.1940487
Artikel, Bibliographie

Baehtz, Carsten ; Buhrmester, Thorsten ; Bramnik, Natalia N. ; Nikolowski, Kristian ; Ehrenberg, Helmut (2005)
Design and performance of an electrochemical in-situ cell for high resolution full-pattern X-ray powder diffraction.
In: Solid State Ionics, 176 (17-18)
doi: 10.1016/j.ssi.2005.03.021
Artikel, Bibliographie

Meštrić, Hrvoje ; Eichel, Rüdiger-A. ; Koss, T. ; Dinse, Klaus-Peter ; Laubach, Sonja ; Laubach, Stefan ; Schmidt, Peter C. ; Schönau, Kristin A. ; Knapp, Michael ; Ehrenberg, Helmut (2005)
Iron-oxygen vacancy defect centers in PbTiO3 : Newman superposition model analysis and density functional calculations.
In: Physical Review B, 71 (13)
doi: 10.1103/PhysRevB.71.134109
Artikel, Bibliographie

Gross, Toni André ; Buhrmester, Thorsten ; Bramnik, Kirill G. ; Bramnik, Natalia N. ; Nikolowski, Kristian ; Baehtz, Carsten ; Ehrenberg, Helmut ; Fuess, Hartmut (2005)
Structure–intercalation relationships in LiNiCoO.
In: Solid State Ionics, 176 (13-14)
doi: 10.1016/j.ssi.2005.02.008
Artikel, Bibliographie

Bramnik, Natalia N. ; Bramnik, Kirill G. ; Buhrmester, Thorsten ; Baehtz, Carsten ; Ehrenberg, Helmut ; Fuess, Hartmut (2004)
Electrochemical and structural study of LiCoPO4-based electrodes.
In: Journal of Solid State Electrochemistry, 8 (8)
doi: 10.1007/s10008-004-0497-x
Artikel, Bibliographie

Leyzerovich, N. N. ; Bramnik, Kirill G. ; Buhrmester, Thorsten ; Ehrenberg, Helmut ; Fuess, Hartmut (2004)
Electrochemical intercalation of lithium in ternary metal molybdates MMoO4 (M: Cu, Zn, Ni and Fe).
In: Journal of Power Sources, 127 (1-2)
doi: 10.1016/j.jpowsour.2003.09.010
Artikel, Bibliographie