Abstract
Because of its high energy density, the manganese-rich lithium layered material is a potential cathode material for power batteries. In order to effectively strengthen the comprehensive performance of lithium-rich layered material, different amounts of YPO4 compounds were used to wet chemically coat the cathode materials. The LMNCO, 0.5-YPO4, 1.0-YO4 and 3.0-YPO4 cathode materials are tested by XRD, SEM, TEM, XPS, constant current charge and discharge test, and EIS. Facts show that the positive electrode material coated with YPO4 has better cycle performance and rate performance. The 1.0-YPO4 sample material has the best performance. After 50 cycles of 0.5 C, its discharge capacity can still be as high as 207.4 mAhg-1.The comprehensive performance of the cathode material is improved after being coated with YPO4, which is owing to the coating of YPO4. The YPO4 layer weakens the electron transfer resistance, and suppress the phase transformation of the Electrode material and the formation of the SEI film.
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