提高锂离子电池天然石墨负极倍率性能研究  

Investgation on improving the negative rate performance of natural graphite in lithium ion battery

作　　者：穆江涛 杨林 王英新 李松男 张千玉 邵光杰[1] 王振波 MU Jiang-tao;YANG Lin;WANG Ying-xin;LI Song-nan;ZHANG Qian-yu;SHAO Guang-jie;WANG Zhen-bo(Yanshan University,College of Environmental and Chemical Engineering,Qinhuangdao 066000,China;Harbin Institute of Technology,School of Chemistry and Chemical Engineering,Harbin 150001,China;Jixi Weida New Material Technology co.,LTD,Jixi 158100,China;School of Materials Science and Engineering,Dongguan University of Technology,Dongguan 52380&China)

机构地区：[1]燕山大学环境与化学工程学院,秦皇岛066000 [2]哈尔滨工业大学化工与化学学院,哈尔滨150001 [3]鸡西市唯大新材料科技有限公司,鸡西158100 [4]东莞理工学院材料科学与工程学院,东莞523808

出　　处：《炭素》2020年第2期5-12,共8页Carbon

基　　金：黑龙江省“百千万”工程科技重大专项项目(项目编号:2019ZX09A02)和广东省自然科学基金-博士启动项目(项目编号:2016A030310127)。

摘　　要：随着科学技术的进步,尤其以新能源汽车等新兴产业的发展更加依赖电池创新,对锂离子电池的倍率性能提出了更高的要求。天然石墨电极作为传统的锂离子电池负极,具有价格便宜、储蓄量大、具有优良的导电性等优点,但也存在着循环后体积膨胀,倍率性能低等诸多问题,目前可以通过多种改性方法提升它的倍率性能。本文总结了通过改善固体电解质界面(SEI膜)、缩短锂离子的扩散距离等当前提升天然石墨倍率性能的主要方法,并指出了改善倍率性能的未来方向。With the progress of science and technology,especially the development of new energy vehicles and other emerging industries rely more on battery innovation,which puts forward higher requirements for the rate performance of lithium-ion batteries.As a traditional negative electrode of lithium-ion battery,natural graphite electrode has many advantages,such as low price,large savings,excellent conductivity,etc.,but it also has many problems,such as volume expansion after circulation,low rate performance,etc.at present,its rate performance can be improved by a variety of modification methods.This paper summarizes the main methods to improve the rate performance of natural graphite by improving the solid electrolyte in terface(SEI)and shortening the diffusion distance of lithium ion,and points out the future direction of improving the rate performance.

关 键 词：锂离子电池 天然石墨 微膨处理 碳包覆 

分 类 号：TM911.3[电气工程—电力电子与电力传动]