文献类型：期刊文献

中文题名：组合法制备MnO_2/活性碳复合电极材料及其电化学性能研究

英文题名：MnO_2/activated carbon composite electrode materials prepared by combination method and its electrochemical performance

作者：李祥 郑峰 罗援 罗泳梅 张琼

第一作者：李祥

机构：[1]贵州理工学院材料与冶金工程学院;[2]中南大学材料科学与工程学院

第一机构：贵州理工学院材料与冶金工程学院

年份：2017

卷号：48

期号：8

起止页码：186-189

中文期刊名：功能材料

外文期刊名：Journal of Functional Materials

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD_E2017_2018】；

基金：贵州省科学技术基金资助项目(黔科合J字[2014]2077);贵州省科学技术联合基金资助项目(黔科合LH字[2015]7092)

语种：中文

中文关键词：超级电容器;活性碳;比电容;循环性能

外文关键词：supercapacitor ; Mn02; activated carbon ; specific capacitance ; cycle properties

摘要：在不同温度的反应釜中使KMnO_4与MnCl_2进行反应并掺杂活性碳,然后组合球磨工艺制备了超级电容器复合电极材料。XRD揭示MnO_2/活性碳复合物低于140℃烧结5h为水合非晶态,而165℃烧结时,开始呈现弱的衍射峰。通过SEM分析得出电活性复合物形貌呈现为细小环绕微纳米晶须球状。采用循环伏安、怛流充放电及阻抗谱测试MnO_2/活性碳复合电极的电化学性能。当扫描速率为10 mV/s时,MnO_2/活性碳复合电极的比电容值达365F/g且等效串联电阻值仅为1.32Ω。经3 000次循环后复合电极的比电容值仅下降约6%。
KMnO4was reacted with MnCl2in reaction kettle at different temperature and doped with activated carbon.Then composite electrode materials for supercapacitor were prepared by combining ball mill process.XRD revealed that MnO2/activated carbon composite was hydrated amorphous while sintered at low140°C for5h.Meanwhile,the composite showed diffraction peaks at sintering temperature of165°C.SEM analysis illus-trated that the morphology of the electroactive composite was tiny and surrounded micro-nanometer whisker globe.Electrochemical performances of composite electrode were tested by cyclic voltammetry,galvanostatic charge-discharge and impedance spectrum.When scan rate was10mV/s,specific capacitance of the electrode reached365F/g and equivalent series resistance value was of1.32O.After3000cycles,capacitance value of composite electrode decayed by approximately6%.