引用本文:
王洪, 张伟德. 富锂正极材料Li[Li0.2Mn0.4Fe0.4]O2的表面包覆改性[J]. 应用化学,
2013, 30(6): 705-709.
doi:
10.3724/SP.J.1095.2013.20364
Citation: WANG Hong, ZHANG Weide. Surface-coating Modification of Li-rich Cathode Materials Li[Li0.2Mn0.4Fe0.4]O2[J]. Chinese Journal of Applied Chemistry, 2013, 30(6): 705-709. doi: 10.3724/SP.J.1095.2013.20364
Citation: WANG Hong, ZHANG Weide. Surface-coating Modification of Li-rich Cathode Materials Li[Li0.2Mn0.4Fe0.4]O2[J]. Chinese Journal of Applied Chemistry, 2013, 30(6): 705-709. doi: 10.3724/SP.J.1095.2013.20364
富锂正极材料Li[Li0.2Mn0.4Fe0.4]O2的表面包覆改性
摘要:
用共沉淀法合成了富锂正极材料Li[Li0.2Mn0.4Fe0.4]O2,并对其表面进行Al2O3包覆。采用XRD、SEM和电化学测试等方法对样品进行表征。结果表明,与Li[Li0.2Mn0.4fe0.4]O2相比,包覆改性后的Li[Li0.2Mn0.4Fe0.4]O2具有较好的电化学性能,其初始放电容量未明显降低,而循环寿命大大提高,4.0%Al2O3包覆处理的富锂正极材料经50次充放电循环后,容量衰减量在9%左右。
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关键词:
- 锂离子电池
- / 表面包覆Li[Li0.2Mn0.4Fe0.4]O2
- / 富锂正极材料
English
Surface-coating Modification of Li-rich Cathode Materials Li[Li0.2Mn0.4Fe0.4]O2
Abstract:
Li-rich cathode material of Li[Li0.2Mn0.4Fe0.4]O2 was prepared by co-precipitation,and was modified by surface coating with Al2O3. The modified samples were characterized by X-ray diffraction,scanning electron microscopy,and electrochemical tests. It was found that the 4.0% Al2O3 coated Li[Li0.2Mn0.4Fe0.4]O2 exhibited a good cycling performance compared with the bare Li[Li0.2Mn0.4Fe0.4]O2. The discharge capacity loss of the surface coated Li[Li0.2Mn0.4Fe0.4]O2 after 50 cycling was about 9%.
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