超级电容器(NixCo1-x)0.85Se纳米球状正极材料的制备及性能研究
Preparation and properties of(NixCo1-x)0.85Se nano spherical cathode material for supercapacitor
张卫国 1陈光耀 2王宏智 2姚素薇2
作者信息
- 1. 天津大学化工学院,天津 300072;天津体育学院,天津 301617
- 2. 天津大学化工学院,天津 300072
- 折叠
摘要
采用溶剂热法制备了镍钴双金属硒化物(NixCo1-x)0.85Se电极材料,利用XRD、SEM、TEM以及XPS测试材料的微观形貌和元素组成,通过三电极体系测试电极材料的电化学性能.(NixCo1-x)0.85Se呈现纳米球状结构,直径在200～500 nm之间.通过调节实验条件,合成了 Ni/Co比例不同的材料,其中(Ni0.50Co0.50)0.85Se具有最大比电容值(2 900 F·g-1,1 A·g-1).(Ni0.50Co0.50)0.85Se与活性炭组装成混合超级电容器,循环稳定性较好(1 A·g-1电流密度下2 500次充放电循环后,电容保持率83.21％),表明镍钴硒化物在超级电容器领域具有较高的应用价值.
Abstract
Ni-Co bimetal selenide(NixCo1-x)0.85Se electrode material was prepared by solvothermal meth-od.The microstructure and elemental composition of the electrode material were measured by XRD,SEM,TEM and XPS.The electrochemical properties of the electrode material were tested by three-elec-trode system.(NixCo1-x)0.85Se presents a nano-spherical structure with a diameter of 200-500 nm.By adjusting the experimental conditions,the materials with different Ni/Co ratios were synthesized,in which(Ni0.50Co0.50)0.85Se had the maximum specific capacitance(2 900 F·g-1,1 A·g-1).(Ni0.50Co0.50)0.85Se was assembled with activated carbon to form hybrid supercapacitor,and the cycle stability was good(the capacitance retention rate was 83.21％after 2 500 charge-discharge cycles at 1 A·g-1 current density),indicating that Ni-Co selenide has high application value in the field of super-capacitor.
关键词
镍钴硒化物/混合超级电容器/纳米球状材料Key words
nickel cobalt selenide/hybrid supercapacitor/nano spherical material引用本文复制引用
出版年
2025
NETL
NSTL
万方数据