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Issue 27, 2011
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A novel concentration-gradient Li[Ni0.83Co0.07Mn0.10]O2 cathode material for high-energy lithium-ion batteries

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Abstract

A novel concentration-gradient Li[Ni0.83Co0.07Mn0.10]O2 cathode material was successfully synthesized viaco-precipitation, in which the core Li[Ni0.9Co0.05Mn0.05]O2 was encapsulated completely with a stable concentration-gradient layer having reduced Ni content. The electrochemical and thermal properties of the concentration-gradient Li[Ni0.83Co0.07Mn0.10]O2 were studied and compared to those of the core Li[Ni0.9Co0.05Mn0.05]O2 material alone. The concentration-gradient material had a superior lithium intercalation stability and thermal stability compared to the core material. The high capacity was delivered from the Ni-rich core Li[Ni0.9Co0.05Mn0.05]O2, and the improved thermal stability was achieved by the Ni-depleted concentration-gradient layer with outer surface composition of Li[Ni0.68Co0.12Mn0.20]O2. The concentration-gradient materials open a new era for the development of advanced Li-ion batteries with high energy density, long cycle life, and improved safety.

Graphical abstract: A novel concentration-gradient Li[Ni0.83Co0.07Mn0.10]O2 cathode material for high-energy lithium-ion batteries

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Article information


Submitted
05 Dec 2010
Accepted
13 Jan 2011
First published
09 Feb 2011

J. Mater. Chem., 2011,21, 10108-10112
Article type
Paper

A novel concentration-gradient Li[Ni0.83Co0.07Mn0.10]O2 cathode material for high-energy lithium-ion batteries

Y. Sun, B. Lee, H. Noh, H. Wu, S. Myung and K. Amine, J. Mater. Chem., 2011, 21, 10108
DOI: 10.1039/C0JM04242K

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