AlF3包覆对Li1.2Mn0.534Ni0.133Co0.133O2正极材料电化学性能的影响

引用本文: 王旭阳, 叶学海, 郅晓科, 何爱珍, 赵桢, 章甦, 时洁. AlF₃包覆对Li_1.2Mn_0.534Ni_0.133Co_0.133O₂正极材料电化学性能的影响[J]. 无机化学学报, 2013, 29(4): 774-778. doi: 10.3969/j.issn.1001-4861.2013.00.067 shu

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 Li_1.2Mn_0.534Ni_0.133Co_0.133O₂ Cathode Materials[J]. Chinese Journal of Inorganic Chemistry, 2013, 29(4): 774-778. doi: 10.3969/j.issn.1001-4861.2013.00.067 shu

AlF₃包覆对Li_1.2Mn_0.534Ni_0.133Co_0.133O₂正极材料电化学性能的影响

摘要: 通过共沉淀法制备锂离子电池富锂锰基正极材料Li_1.2Mn_0.534Ni_0.133Co_0.133O₂, 并对其进行AlF₃包覆。实验结果表明, 通过AlF₃包覆, 材料的电化学性能得到明显提高。在0.2C下, 包覆前材料的首次放电比容量为253 mAh·g^-1, 首次充放电效率仅为88.8%。经过AlF₃包覆, 材料的首次放电比容量提高到294 mAh·g^-1, 首次充放电效率高达96.4%。同样, 在1.0C下循环50次, 未包覆材料的放电比容量由225 mAh·g^-1降到185 mAh·g^-1, 容量保持率仅为82.2%。经过AlF₃包覆, 材料的放电比容量由230 mAh·g^-1仅降为222 mAh·g^-1, 容量保持率高达96.5%。

关键词:

锂离子电池;AlF₃包覆;Li_1.2Mn_0.534Ni_0.133Co_0.133O₂;充放电性能

English

Effects of AlF₃ Coating on the Electrochemical Performance of Li_1.2Mn_0.534Ni_0.133Co_0.133O₂ Cathode Materials

1.
CNOOC Tianjin Chemical Research & Design Institute, Tianjin 300131, China
Received Date: 26 August 2012

Abstract: Li_1.2Mn_0.534Ni_0.133Co_0.133O₂ 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.

Key words:

lithium ion batteries;AlF₃ coating;Li_1.2Mn_0.534Ni_0.133Co_0.133O₂;charge/discharge performance

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

AlF₃包覆对Li_1.2Mn_0.534Ni_0.133Co_0.133O₂正极材料电化学性能的影响

English

Effects of AlF₃ Coating on the Electrochemical Performance of Li_1.2Mn_0.534Ni_0.133Co_0.133O₂ Cathode Materials

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