Purification process of coal-based coke powder as anode for Li-ion batteries  

作　　者：杨娟 马路路 周向阳 

机构地区：[1]Powder Metallurgy Research Institute, Central South University [2]School of Metalllurgy and Environment, Central South University

出　　处：《Journal of Central South University》2014年第3期857-861,共5页中南大学学报（英文版）

基　　金：Projects(51274240,51204209) supported by the National Natural Science Foundation of China;Project(2012M521545) supported by the National Postdoctoral Science Foundation of China

摘　　要：A process of purification of coal-based coke powder as anode the treatment of coke powder with dilute hydrofluoric acid solution, for Li-ion batteries was attempted. The process started with followed by united-acid-leaching using sulfuric acid and hydrochloric acid. The effects of altering the hydrofluoric acid addition, hydrofluoric acid concentration, contact time, temperature and acid type were investigated. A minimum ash content of 0.35% was obtained when proper conditions were applied. The electrochemical performance of purified coke powder shows greatly improved electrochemical performance. The as-purified coke powder presented an initial reversible capacity of 257.4 mAh/g and a retention rate of 95% after 50 cycles. The proposed purification process paves a way to prepare a promising anode material with good performance with low cost of coke powder for Li-ion batteries.A process of purification of coal-based coke powder as anode for Li-ion batteries was attempted. The process started with the treatment of coke powder with dilute hydrofluoric acid solution, followed by united-acid-leaching using sulfuric acid and hydrochloric acid. The effects of altering the hydrofluoric acid addition, hydrofluoric acid concentration, contact time, temperature and acid type were investigated. A minimum ash content of 0.35% was obtained when proper conditions were applied. The electrochemical performance of purified coke powder shows greatly improved electrochemical performance. The as-purified coke powder presented an initial reversible capacity of 257.4 mAh/g and a retention rate of 95% after 50 cycles. The proposed purification process paves a way to prepare a promising anode material with good performance with low cost of coke powder for Li-ion batteries.

关 键 词：purification process coal-based coke powder anode material Li-ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动]