无机材料学报2017，Vol.32Issue(2)：135-140,6.DOI:10.15541/jim20160276
(Mn7C3,Ni)@C核壳型纳米粒子制备及超级电容器电化学特性
Preparation and Electrochemical Properties of Core-shell (Mn7C3, Ni)@C Nanoparticles
摘要
Abstract
(Mn7C3,Ni)@C nanoparticles were synthesized for electrode material in a supercapacitor.Using DC arc-discharge method,in which the anodic target of Ni-Mn mixture was evaporated in the methane atmosphere by a tungsten cathode.The prepared nanoparticles own a well-defined core/shell structure with average diameter of 50 nm.Encapsulated inside of the carbon shell,the core of the nanoparticles is composed of Mn7C3 and Ni.Owing to its catalytic effect,Ni promotes the growth of carbon shell which has the typical double-layer capacitance.Meanwhile Mn7C3 as the product of Mn-C reaction is able to provide pseudo-capacitance.The proportion of Ni-Mn in the nanoparticles consequently affects the overall electrochemical performance of the electrodes.The specific capacitance of the electrode increases with the promotion of Mn content (485.12 F/g).The results shows that the nanoparticles with more Ni have better cycle stability (303.57 F/g) and retain 70％ of the initial capacitance after 1000 cycles.关键词
(Mn7C3/Ni)@C核壳纳米粒子/电极材料/直流电弧法/超级电容器Key words
(Mn7C3, Ni)@C core-shell nanoparticles/electrode material/arc-discharge method/supercapacitor分类
能源科技引用本文复制引用
王玲玲,黄昊,Ramon Alberto Paredes Camacho,吴爱民,曹国忠..(Mn7C3,Ni)@C核壳型纳米粒子制备及超级电容器电化学特性[J].无机材料学报,2017,32(2):135-140,6.基金项目
国家自然科学基金(51171033) （51171033）
国家中央高校基本科研业务费专项资金(DUT15LAB05,DUT16LAB03)National Natural Science Foundation of China (51171033) （DUT15LAB05,DUT16LAB03）
The Fundamental Research Funds for the Central Universities(DUT15LAB05,DUT16LAB03) （DUT15LAB05,DUT16LAB03）
