Significant enhancement on electrochemical performance of Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode via YPO4 coating

초록

The YPO4-coated LiNi0.8Co0.1Mn0.1O2 cathode material is successfully fabricated and electrochemical performances are evaluated. The YPO4-modified LiNi0.8Co0.1Mn0.1O2 cathode exhibits an initial discharge capacity of 204.7 mAh g(-1) (at 0.1 C) and delivers a discharge capacity of 179.5 mAh g(-1) after 100 cycles, which are superior performances than those of pristine LiNi0.8Co0.1Mn0.1O2 cathode. It is demonstrated that YPO4-coated LiNi0.8Co0.1Mn0.1O2 cathode has a positive effect on electrochemical performances, especially rate capability and cycling stability. Therefore, these results are considered that the YPO4 coating layer acts as a barrier to keep the LiNi0.8Co0.1Mn0.1O2 from the physical/chemical attack of electrolyte.

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