热处理温度对中间相炭微球电化学性能的影响  

EFFECT OF HEAT-TREATMENT TEMPERATURE ON ELECTROCHEMICAL PROPERTIES OF MESOCARBON MICROBEADS

作　　者：宋士华[1] 侯翠岭[2] 魏健宁[2] 

机构地区：[1]九江学院机械与材料工程学院,江西九江副教授332005 [2]九江学院理学院,江西九江讲师332005

出　　处：《煤炭转化》2015年第3期74-77,86,共5页Coal Conversion

基　　金：江西省自然科学(青年)基金资助项目(20111521020013);江西省教育厅青年科技项目(GJJ10257)

摘　　要：采用甲醛聚合改性煤沥青,运用热聚合工艺制备出中间相炭微球(MCMB),并对MCMB进行高温热处理.利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和电池测试仪等对MCMB的微观结构和电化学性能进行研究.结果表明,高温热处理可有效改善MCMB中碳原子排列和微晶结构的有序化程度.并随着热处理温度的提高,MCMB的可逆容量、不可逆容量和首次充电容量降低,库仑效率和充放电效率升高,循环性能增加.1 400℃热处理后,MCMB的充放电效率最高,循环性能最优.Mesocarbon microbeads （MCMB） were prepared via pyrolysis condensation of coal-tar pitch modified with formaldehyde. The microstructure and electrochemical properties were investigated using scanning electron microscope （SEM）, X-ray diffraetion （XRD） and battery tester. The results indicate that MCMB treated by high temperature can effectively improve the ordering degree of carbon atoms arranged and microcrystalline structure in MCMB. With the in- crease of heat treatment temperature, reversible capacity, irreversible capacity and first charge capacity of MCMB decreased, eoulombic and charge-discharge efficiency increased, and cycle per- formance enhanced. The charge-discharge capacity of MCMB heat-treated at 1 400 ℃ was the highest, and the cycle performance was the excellentest.

关 键 词：中间相炭微球 热处理 电化学性能 

分 类 号：TQ522.65[化学工程—煤化学工程] TM911.15[电气工程—电力电子与电力传动]