Robust pseudocapacitive charge storage behavior in Li3VO4 induced by N doped MXene

Abstract

High theoretical capacity and safety performance endow Li3VO4 with great promising as anode material for Li-ion batteries. However, approaches and inner mechanisms to advance the performance of Li3VO4 are limited. Herein, we demonstrate for the first time, continuously-high pseudocapacitive charge storage triggered by N doped MXene in a Li3VO4-based electrode, resulting in excellent comprehensive electrochemical performance. The hybrid electrode delivers high discharge capacity of 515.2 mAh g−1 after 500 cycles at 0.1 A g−1. After periodic rate performance test from 0.1 to 2.0 A g−1 for 410 cycles, the capacity of the hybrid electrode can be fully recovered. Followed by additional 1000 cycles at 0.5 A g−1, the hybrid electrode still delivers high discharge capacity of 457.6 mAh g−1. The robust capacitive charge storage induced by N doped MXene and the remarkable comprehensive electrochemical performance are referential for the design of high performance Li3VO4-based anode material, and the facile approach is beneficial for mass production toward practical application.Graphical abstract [Display omitted] N doped MXene induced robust pseudocapacitive charge storage in a Li3VO4 electrode is firstly demonstrated responsible for the excellent comprehensive electrochemical performance.