酚醛树脂炭包覆氧化微晶石墨负极材料的电化学性能研究  

Study on Electrochemical Properties of Phenolic Resin Carbon Coated Graphite Oxide Anode Material

作　　者：周姣红[1] 杨晓红[1] 孙忠刚[1] 

机构地区：[1]湖南工业职业技术学院,湖南长沙410208

出　　处：《湖南有色金属》2017年第4期47-49,共3页Hunan Nonferrous Metals

基　　金：湖南工业职业技术学院院级项目(GYKYZ2016007)

摘　　要：采用双氧水对天然微晶石墨进行表面氧化处理,并用酚醛树脂炭包覆氧化处理石墨,考察了氧化处理和包覆处理对天然微晶石墨晶体结构、形貌和电化学性能的影响。结果表明:双氧水表面氧化增加了微晶石墨表面含氧官能团,提高了微晶石墨材料的储锂容量,首次脱锂容量由321.4m Ah/g提高到350.6 m Ah/g;酚醛树脂炭包覆氧化处理石墨的首次充放电效率提高至83.9%,30次充放电循环后的容量保持率提高到92%。Using hydrogen peroxide surface oxidation treatment of natural graphite,and phenolic resin carbon coated graphite oxidation,oxidation and coating effects on crystal structure,morphology and electrochemical performance of nature graphite were investigated. The results show that： After oxidized by H2O2,the oxygenated group was formed at the crystal interface of nature graphite and the capacity for storing lithium-ion. The initial reversible capacity increases to350. 6 m Ah/g from 321. 4 m Ah/g,the coulomb efficiency of first cycle for the oxidized sample increased to 83. 9%,and the capacity retention after 30 cycles was increased to 92% after coated treatmeat.

关 键 词：负极材料 天然微晶石墨 表面氧化 包覆 电化学性能 

分 类 号：TG113.224[金属学及工艺—物理冶金]