Layered solid solution material Li1.2Ni0.2Mn0.6O2 is synthesized and the AlF3 is added to improve the
electrochemical performance. X-ray diffraction (XRD) results show that the Li1.2Ni0.2Mn0.6O2 samples exhibit
layered characteristics. The AlF3 additive is detected by transmission electron microscope (TEM) technology. The
electrochemical tests show that Li1.2Ni0.2Mn0.6O2 electrode with AlF3 added delivers better discharge capacity
(240mA· h/g), first coulomb efficiency 79.2%, cyclic performance (capacity retention ratio of 100.6% after 50
cycles), and rate capacity (68mA· h/g at 10 capacity (C)) than the pristine sample. Electrochemical impedance
spectroscopy (EIS) results show that the charge transfer resistance of Li1.2Ni0.2Mn0.6O2 electrode with AlF3 added
increases slower than that of pristine Li1.2Ni0.2Mn0.6O2 after cycling, which is responsible for better cyclic and
rate performance.
LIU Yun-jian1,2,3* (刘云建), LIU San-bing2 (刘三兵), CHEN Xiao-hua2 (陈效华), CHEN Long3 (陈龙)
. Improvement the Electrochemical Performance of Li1.2Ni0.2Mn0.6O2 Electrode with AlF3 Added[J]. Journal of Shanghai Jiaotong University(Science), 2012
, 17(6)
: 697
-700
.
DOI: 10.1007/s12204-012-1348-z
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