Agitation drying synthesis of porous carbon supported Li3VO4 as advanced anode material for lithium-ion batteries

• 作者: Wen-Wen Gou Shuang Zhou Xin-Xin Cao Yi-Lin Luo Xiang-Zhong Kong Jing Chen Xue-Fang Xie An-Qiang Pan
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（12）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 3466-3476
• 页数: 11页
• 语种: 英文

摘要

Li3VO4 has been considered as a promising insertion-type anode for lithium-ion batteries due to its high theoretical specific capacity and suitable operating voltage platform.However,this promising anode still suffers from poor electrical conductivity.To address this issue,herein,a porous carbon supported Li3VO4 compos-ites (Li3VO4/C) via a facile agitation-drying method combined with subsequent calcination is reported,in which Ketjen black carbon with high porosity,easy dispersion and excellent conductivity can serve as one of carbon sources.The Li3VO4/C composite prepared at 700 ℃ with a carbon content of ～ 10％ exhibits the optimized struc-ture.The void space of the composite accommodates the volume changes during the charge/discharge process.Meanwhile,the carbon shell serves as a conductive skeleton to provide bi-continuous Li ions and electrons pathways.Electrochemical results reveal that the compos-ite delivers a high initial discharge capacity of 572 mAh·g-1 and maintains a capacity of 442.9 mAh·g-1 after 100 cycles at 100 mA·g-1.Even at a high current density of 2 A·g-1,a considerable capacity of 243.8 mAh·g-1 can still be obtained.This work provides a promising approach for the practical application of Li3VO4 as anode material for LIBs.