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4. Improved Rate Capability and Thermal Stability of LiNi0.5Co0.2Mn0.3O2 Cathode Materials via Nanoscale SiP2O7 Coating.

Author

Yong-Seok Lee, Docheon Ahn, Young-Hyun Cho, Tae Eun Hong, and Jaephil Cho

Subjects
STABILITY (Mechanics), CATHODES, THIN films, LITHIUM, NICKEL, SILICON, POTASSIUM, IONS
Abstract

LiδPyOz-coated LiNi0.5Co0.2Mn0.3O2 cathode materials doped with P and Si ions were prepared by direction reaction of LiOH and SiP2O7-coated Ni0.5Co0.2Mn0.3(OH)2 precursors. The coated cathodes exhibited quite impressive results; rate capability was improved by almost 100% at a 7 C rate compared to pristine LiNi0.5Co0.2Mn0.3O2. Furthermore, the amount of heat generation at 4.5 V charge cut-off as a result of the evolution of oxygen was reduced by 79%, compared to pristine LiNi0.5Co0.2Mn0.3O2 sample. [ABSTRACT FROM AUTHOR]

Published
2011
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