Controllable synthesis of Li3VO4/N doped C nanofibers toward high-capacity and high-rate Li-ion storage

Li3VO4 (LVO) is a promising anode material with comprehensive advantages of energy density and safety performance. However, it suffers from unsatisfactory performance correlating with intrinsic poor reaction kinetics. Herein, morphology-controlled synthesis of LVO/N doped C nanofibers (LVO/NC NFs) is successfully realized via a concise electrospinning approach using low-cost raw materials. The designed LVO/NC NFs show excellent reaction kinetics which result in high pseudocapacitive Li-ion storage throughout cycling, giving rise to ultra-high capacity and prominent rate performance. It delivers discharge capacity of 750 mAh g(-1) after 400 cycles at 0.2 A g(-1), and 545 mAh g(-1) after 900 cycles at 2.0 A g(-1). After 2 period rate performance testing from 0.2 to 4.0 A g(-1) over 170 cycles, the discharge capacity still reverts to 717 mAh g(-1) when the current decreases back to 0.2 A g(-1). Tuning the reaction kinetics of LVO via facile electrospinning provides a feasible strategy for constructing high-performance LVO-based anode material. (C) 2021 Elsevier Ltd. All rights reserved.

Automated summary

In this study, morphology-controlled synthesis of LVO/NC NFs was achieved, showing excellent reaction kinetics and high pseudocapacitive Li-ion storage performance. The material exhibited high capacity and prominent rate performance after cycling tests, indicating its potential as a high-performance anode material.