Asymmetric supercapacitors based on high capacitance Ni6MnO8 and graphene

被引：0

作者：

Mingyang Zeng ^{[1
]}

Li Zhang ^{[1
]}

DANDan Wu ^{[1
]}

Jun Ma ^{[1
]}

Cao Zhang ^{[1
]}

Shujuan Li ^{[2
]}

机构：

[1] Department of Physics, School of Science, Lanzhou University of Technology

[2] Institute for Mathematics, Free University of Berlin

来源：

Chinese Chemical Letters | 2019年 / 30卷 / 06期

基金：

中国博士后科学基金;

关键词：

Ni6MnO8; Electrode; Asymmetric supercapacitors; Power density; Energy density;

D O I：

暂无

中图分类号：

TM53 [电容器]; TQ127.11 []; TQ138.13 [];

学科分类号：

080801 ; 0817 ;

摘要：

Supercapacitors with high energy density and high power density have attracted numerous attentions.Here,we successfully synthesized Ni6MnO8material by a fast,facile,and cost-effective method,which the area specific capacitance was found to be as high as 1113 mF/cm2at a current density of 1 mA/cm2.Further,the asymmetric supercapacitor was assembled by using Ni6MnO8as the positive electrode and graphene as the negative electrode with an operation potential from 0 to 1.4 V.It exhibited an area specific capacitance of 69.1 m F/cm2at 0.5 mA/cm2and stable cycling performance which presented about 80% capacitance retention after 5000 cycles at 5 mA/cm2.The energy density of graphene//Ni6MnO8supercapacitors was calculated to be 18.81 mWh/cm2at a power density of 350.1 mW/cm2and still remained 5.8 mWh/cm2at a power density of 6990,7 mW/cm2,meaning that the asymmetric supercapacitor combine excellent power density and energy density.

引用

页码：1329 / 1334

页数：6