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摘要:
The Li-rich cathode materials Li[NixLi1/3-2x/3Mn2/3-x/3]O-2 (x = 1/5, 1/4, 1/3) were synthesized with co-precipitated metal hydroxide precursors M ( OH) (2) ( M = Mn, Ni). The results of X-ray diffraction ( XRD) and selected area electron diffraction( SAED) analysis confirmed the Li, Ni and Mn atoms are ordered in the M layer to form the superstrucutre. Images of scanning electron microscopy( SEM) show the Li-rich materials particles are about 1-3 mu m, aggregated of submicron grains. Electrochemical behavior was examined by charge-discharge cycling. The Li [ NixLi1/3-2x/3Mn2/3-x/3 ]O-2 (x = 1/5, 1/4, 1/3) materials exhibited high reversible capacity of 200-240 mA . h/g and excellent cycle performance between 2.0 and 4.8 V at 10 mA/g current density.
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来源 :
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
ISSN: 0251-0790
年份: 2009
期: 12
卷: 30
页码: 2358-2362
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JCR@2022
ESI学科: CHEMISTRY;
JCR分区:3
中科院分区:1