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

• Published in: Electrochimica acta Vol. 384; p. 138386
• Main Authors: Xu, Zhen, Li, Daobo, Xu, Jie, Lu, Junlin, Zhang, Dongmei, Ni, Shibing
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 10.07.2021; Elsevier BV
• Subjects: Anode; Anodes; Chemical synthesis; Discharge; Electrode materials; Electrospinning; Flux density; Ion storage; Lithium ion batteries; Lithium ions; Lithium vanadate; Morphology; Nanofibers; Raw materials; Reaction kinetics; Stability; Lithium ion batteries; Lithium vanadate; Anode; Nanofibers
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2021.138386

•First controllable fabrication of 1D porous Li3VO4/N doped c nanofiber.•Tuning the reaction kinetics of Li3VO4-based electrode via a facile strategy.•Ultra-high capacity and excellent rate capability for the Li3VO4/NC NFs.•New understandings between the morphology and the performance. 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. Fast reaction kinetics and excellent performance were achieved in 1D porous Li3VO4/NC nanofibers synthesized via a scalable and economical electrospinning approach. [Display omitted]