Citation:
WANG Xu-Yang, YE Xue-Hai, ZHI Xiao-Ke, HE Ai-Zhen, ZHAO Zhen, ZHANG Su, SHI Jie. Effects of AlF3 Coating on the Electrochemical Performance of Li1.2Mn0.534Ni0.133Co0.133O2 Cathode Materials[J]. Chinese Journal of Inorganic Chemistry,
;2013, 29(4): 774-778.
doi:
10.3969/j.issn.1001-4861.2013.00.067
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Li1.2Mn0.534Ni0.133Co0.133O2 cathode material of lithium ion batteries was prepared by co-precipitation method, and then the cathode material was coated by AlF3. The experiment results showed that the electrochemical properties of AlF3-coated material were improved obviously. Before coating, the initial discharge capacity was 253 mAh·g-1 at 0.2C with a charge/discharge efficiency of only 88.8%. However, after coating, the initial discharge capacity was 294 mAh·g-1 at 0.2C with a charge/discharge efficiency of 96.4%. Similarly, the capacity retention was also improved through AlF3 coating. The pristine material delivered a discharge capacity of only 185 mAh·g-1 (with capacity retention of 82.2%) after 50 charge/discharge cycles at 1.0C. Meanwhile, the AlF3-coated material delivered a discharge capacity of 222 mAh·g-1 (with capacity retention of 96.5%) after 50 charge/discharge cycles at 1.0C.
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