One-pot synthesis of Li3VO4@C nanofibers by electrospinning with enhanced electrochemical performance for lithium-ion batteries

Ruihuan Qin; Gaoqi Shao; Junxian Hou; Zhi Zheng; Tianyou Zhai; Huiqiao Li

doi:10.1016/j.scib.2017.07.001

One-pot synthesis of Li₃VO₄@C nanofibers by electrospinning with enhanced electrochemical performance for lithium-ion batteries

Sci Bull (Beijing). 2017 Aug 15;62(15):1081-1088. doi: 10.1016/j.scib.2017.07.001. Epub 2017 Jul 8.

Authors

Ruihuan Qin¹, Gaoqi Shao¹, Junxian Hou², Zhi Zheng¹, Tianyou Zhai¹, Huiqiao Li³

Affiliations

¹ State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China.
² Department of Composite Materials and Engineering, College of Materials Science and Engineering, Hebei University of Engineering, Handan 056038, China.
³ State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China. Electronic address: hqli@hust.edu.cn.

PMID: 36659335
DOI: 10.1016/j.scib.2017.07.001

Abstract

Electrospinning is firstly used to one-pot synthesis of Li₃VO₄@C nanofibers in a large scale. Although with the presence of organic sources in synthesis process, the pure phase Li₃VO₄ with superior nanofibrous morphology is still successfully obtained through adjusting different heat treatment processes and different vanadium sources. The prepared Li₃VO₄@C nanofibers exhibit a unique structure in which nanosized Li₃VO₄ particles are uniformly embedded in amorphous carbon matrix. Compared with Li₃VO₄/C powder, Li₃VO₄@C nanofibers display enhanced reversible capacity of 451mAhg^-1 at 40mAg^-1 with an increased initial coulombic efficiency of 82.3%, and the capacity can remain at 394mAhg^-1 after 100 cycles. This superior electrochemical performance can be attributed to its unique structure which ensures a high reactivity by nanosized Li₃VO₄, more stable electrode/electrolyte interface by carbon encapsulation, improved electronic conductivity and buffered volume changes by flexible carbon matrix. The electrospinning technology provides an effective method to obtain high performance Li₃VO₄ as a promising anode material for lithium-ion batteries.

Keywords: Anode; Carbon nanocomposite; Electrospinning; Lithium vanadium oxide; Lithium-ion batteries.