期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 32, 页码 27326-27332出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b06670
关键词
Li-rich cathode; nano-AlPO4; in situ coating; surface modification; less side products
资金
- National Natural Science Foundation of China [U1637202, U163720101]
- Shanghai Science and Technology Commission Project [16DZ1120700]
- Shanghai Sailing Program [18YF1417000]
Being considered as one of the most potential cathode materials, Li1.15Ni0.17Co0.11Mn0.57O2 draws plenty of attention towards its optimization on cycling and rate performance. The surface coating process provides a longer cycling life and better rate performance for the cathodes. A systematic investigation has been carried out on the nano-AlPO4 coating layer for the Li1.15Ni0.17Co0.11Mn0.57O2 cathode material through a facile in situ dispersion process. The 1% coated cathode material can hold about 90% capacity retention after 100 cycles. Besides, the surface coating enhances the rate ability of Li1.15Ni0.17Co0.11Mn0.57O2, which holds a reversible capacity of 202.3 mAh g(-1) at the rate of 1C. Surface information is collected during cycling, which reveals that less side reactions occur on the electrode-electrolyte interface after the coating process for improved cycling and rate performance.
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