Corresponding Author

Ding-guo XIA(dgxia@pku.edu.cn);
Zi-yu WU


Despite there are many successful reports about the preparation of electrode materials with surface coating for lithium ion batteries, the study in surface self-coating of cathode materials using segregation of doping elements and their electrochemical properties is still very rare. The LiFePO4 particles with rich-Al on the surface were synthesized by one step solvothermal route. TEM results demonstrated that the surface of the obtained LiFePO4 particles was well-covered by the amorphous coating. The soft X-ray absorption spectroscopy (XAS) and Auger electron spectroscopy (AES) component analyses revealed that the amorphous coating was composed of LiFe1-xAlxPO4 by part of Al substitution to Fe. The LiFePO4 material with surface rich-Al showed good electrochemical rate capacity and low temperature performance. This could be attributed to the changes of the bulk and surface electron structures which promote the bulk electron and surface ionic conductivities.

Graphical Abstract


LiFePO4, surface coating, electrochemical performances

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