Low temperature synthesis of LiNiO2@LiCoO2 as cathode materials for lithium ion batteries.

Autor:	Xian-Zhu Fu, Xin Wang, Hong-Feng Peng, Fu-Sheng Ke, Jun-Hu Lei, Ling Huang, Jing-Dong Lin, Dai-Wei Liao
Předmět:	LITHIUM-ion batteries LOW temperatures ORGANIC synthesis SCANNING electron microscopes ELECTROCHEMICAL analysis
Zdroj:	Journal of Solid State Electrochemistry; Jun2010, Vol. 14 Issue 6, p1117-1124, 8p, 4 Black and White Photographs, 9 Graphs
Abstrakt:	Spherical LiNiO2@LiCoO2 as cathode material for lithium ion batteries was synthesized by firing the mixture of β-NiOOH@ β-CoOOH and LiOH at low temperature in air atmosphere. The effect of synthesis conditions on the structure of the resultant samples was investigated by X-ray diffraction, scanning electron microscope, and energy dispersive spectroscope. Spherical LiNiO2@LiCoO2 obtained at 600 °C for 24 h exhibited best layered hexagonal structure and remained core-shell property. Electrochemical test demonstrated that LiNiO2@LiCoO2 had high initial discharge capacity of 181.4 mA h g−1, better cycle, and storage stability than pure LiNiO2 prepared from spherical β-NiOOH. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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