Synthesis and electrochemical Li-storage performance of Li2ZrO3-Li3V2(PO4)3/C composites

A simple and efficient synthetic route was developed to obtain composites by mechanically ball-milling Li2ZrO3 (LZO) with Li3V2(PO4)(3)/C (LVPC). LZO improves the ionic conductivity of LVPC, compensates for the transfer of Li+ between the LVPC and the electrolyte, reduces the impedance of LVPC, and protects LVPC from side reactions caused by direct contact with the electrolyte. The composite consisting of 4.0 wt% of LZO exhibited a considerable electrochemical performance. The 1st discharge capacity reached 192 mAh g(-1) at 30 mA g(-1) between 3.0 and 4.8 V, and remained at 153 mAh g(-1) after 50 cycles. The EIS analysis showed that the charge transfer and diffusion of Li+ in the LZO-LVPC composites were more favorable than those of pristine LVPC. The synthetic method proposed in this work is simple and efficient, which is convenient for large-scale production.

Automated summary

In this study, a simple and efficient synthetic route was developed to prepare LZO-LVPC composites by mechanically ball-milling. The composites showed improved electrochemical performance, with enhanced charge transfer and diffusion of Li+ compared to pristine LVPC. This synthetic method is convenient for large-scale production.