期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 14, 期 6, 页码 919-922出版社
SPRINGER
DOI: 10.1007/s10008-009-0873-7
关键词
Li[Ni-0.Co-5(0).Mn-2(0).(3)]O-2 center dot Li[Ni-0.Co-5(0).Mn-2(0).(3)]O-2 coated with LiFePO4; High temperature performance; Cathode material; Lithium secondary battery
资金
- Ministry of Knowledge Economy, Korea [10028974]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10028974] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Li[Ni0.5Co0.2Mn0.3]O-2 coated with LiFePO4 was synthesized by a co-precipitation method. It consisted of the parent Li[Ni0.5Co0.2Mn0.3]O-2 as the core and the LiFePO4 as the coating material, with an average particle diameter of 500 nm. The LiFePO4-coated Li[Ni0.5Co0.2Mn0.3]O-2 showed no large initial capacity drop in the first cycle, which generally occurred with cathode materials bearing inactive coating layers such as Al2O3, ZnO, and MgO. Furthermore, it presented a remarkably improved cycle retention rate of over 89% until 400 cycles at 50 A degrees C. We suggest that the LiFePO4 coating technique is a very effective tool to improve the cycle performance of Li[Ni0.5Co0.2Mn0.3]O-2 at high temperatures.
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