二氧化锰/纳米碳复合粉末的制备及其电化学性能的研究  

Preparation and electrochemical performance of MnO_2/nanocarbon composite materials for supercapacitors

作　　者：杨晨 周贤良[1] 饶有海[1] 危震坤 YANG Chen;ZHOU Xianliang;RAO Youhai;WEI Zhenkun(School of Materials Science and Engineering,Nanchang Hang Kong University, Nanchang 330063, China)

机构地区：[1]南昌航空大学材料科学与工程学院,南昌330063

出　　处：《功能材料》2017年第12期12120-12124,共5页Journal of Functional Materials

基　　金：江西省教育厅科技落地计划资助项目(DB201101397)

摘　　要：通过3种不同的方法处理制备超级电容器粉末材料的前驱体,其得到MnO_2/纳米炭球(NCs)复合粉末。利用X射线衍射(XRD)、场发射扫描电镜(FSEM)、比表面积测试(BET)等方法对样品粉末性质进行分析,对3种不同方法得到的粉末进行循环伏安、恒流充放电测试,结果表明,保持有前驱体形貌的MnO_2/NCs粉末样品具有良好的电容性能,在5~50 mV的扫描速率下,其比容量保持率分别为80.3%和88%。MnO_2成网络状包覆纳米炭球(NCs)的样品,具有最高的比容量122.6 F/g,其网络状的结构使其拥有较高的比容量与倍率性能。The precursor of powder materials applied in super-capacitor was prepared to obtain MnO2/nano carbon sphere composite powder by three different methods.X-ray diffraction(XRD),field emission scanning electron microscopy(FSEM)and specific surface area test(BET)were used to analyze the properties of composite powder.The electrochemical properties of composite powder were tested by cyclic voltammetry and constant current charge-discharge.Based on the experimental results,the powder keeping the feature of precursor showed good capacitive performance,and the retention rate of specific capacity were80.3%and88%respectively under the scanning rate of550mV.A sample of MnO2coated activated carbon ball with network had the highest specific capacity of122.6F/g.Its reticular structure makes it have higher specific capacity and rate performance.

关 键 词：超级电容器 MnO2/NCs复合粉末 前驱体 倍率性能 

分 类 号：TB332[一般工业技术—材料科学与工程]