LiNi1/3Co1/3Mn1/3O2 is considered as a new-generation cathode material for lithium ion batteries. Al2O3 film was coated on the surface of LiNi1/3Co1/3Mn1/3O2 in order to prevent irreversible reactions between cathode and electrolytes. The structure analysis indicates that the Al2O3 film is amorphous with thickness of about 100nm, the core material has a hexagonal structure. The experiment results show that Al2O3 coating is effective to improve overcharge capability and cycle stability. The capacity retention of the coated LiNi1/3Co1/3Mn1/3O2 is increased by 11.5％ compared with that of a blank sample after 50 charge-discharge cycles at the cutoff voltage of 3.0--4.5V and 1C rate.
LI Xin-Lu
,
KANG Fei-Yu
,
BAI Xin-De
,
SHEN Wan-Ci
. Microstructure and Electrochemical Properties of LiNi1/3Co1/3Mn1/3O2 Coated with Al2O3 Film[J]. Journal of Inorganic Materials, 2007
, 22(6)
: 1037
-1040
.
DOI: 10.3724/SP.J.1077.2007.01037
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