2015

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, S. 3-15. ISSN 09215107,
[Artikel]

2013

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, S. 313-321. ISSN 00134686,
[Artikel]

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, S. 357-363. ISSN 00134686,
[Artikel]

2012

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), S. 12321-12331. ISSN 1463-9076,
[Artikel]

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), S. 2479-2485. ISSN 0022-2461,
[Artikel]

2011

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), S. 33-38. ISSN 02540584,
[Artikel]

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), S. 9669-9674. ISSN 09258388,
[Artikel]

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), S. 3429-3441. ISSN 0897-4756,
[Artikel]

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), S. 9344-9352. ISSN 1463-9076,
[Artikel]

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), S. 108-115. ISSN 01672738,
[Artikel]

2010

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), S. 5180-5185. ISSN 00134686,
[Artikel]

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), S. 484-488. ISSN 02540584,
[Artikel]

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), S. 305-310. ISSN 0947-7047,
[Artikel]

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), S. 300-303. ISSN 09258388,
[Artikel]

2009

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), S. 2008-2011. ISSN 13882481,
[Artikel]

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), S. 1871-1877. ISSN 1618-2642,
[Artikel]

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), S. 3278-3289. ISSN 1463-9076,
[Artikel]

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), S. 273-277. ISSN 09258388,
[Artikel]

2008

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), S. 553-560. ISSN 03787753,
[Artikel]

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), S. 1969-1974. ISSN 01672738,
[Artikel]

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), S. 034108-1. ISSN 00218979,
[Artikel]

2007

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), S. 112906-1. ISSN 00036951,
[Artikel]

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), S. 253-257. ISSN 01672738,
[Artikel]

2005

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), S. 932-935. ISSN 1438-1656,
[Artikel]

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), S. 851-853. ISSN 0021-8898,
[Artikel]

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), S. 17-26. ECS Transactions, [Artikel]

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), S. 74-81. ISSN 03787753,
[Artikel]

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), S. A379-A381. ISSN 10990062,
[Artikel]

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), S. 1647-1652. ISSN 01672738,
[Artikel]

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), S. 1193-1199. ISSN 01672738,
[Artikel]

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), S. 134109-1-134109-10. [Artikel]

2004

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), S. 558-564. ISSN 1432-8488,
[Artikel]

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), S. 76-84. ISSN 03787753,
[Artikel]