| AlF3包覆对Li1.2Mn0.534Ni0.133Co0.133O2正极材料电化学性能的影响 | |
| Effects of AlF3 Coating on the Electrochemical Performance of Li1.2Mn0.534Ni0.133Co0.133O2 Cathode Materials | |
| 摘要: 通过共沉淀法制备锂离子电池富锂锰基正极材料Li1.2Mn0.534Ni0.133Co0.133O2, 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 Li1.2Mn0.534Ni0.133Co0.133O2 充放电性能 | |
| 基金项目: | |
| Abstract: 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. | |
| Keywords: lithium ion batteries AlF3 coating Li1.2Mn0.534Ni0.133Co0.133O2 charge/discharge performance | |
| 投稿时间：2012-08-26 修订日期：2012-09-28 | |
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| 王旭阳,叶学海,郅晓科,何爱珍,赵桢,章甦,时洁.AlF3包覆对Li1.2Mn0.534Ni0.133Co0.133O2正极材料电化学性能的影响[J].无机化学学报,2013,29(4):774-778. | |
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