MgCo_(2)O_(4)@Co(OH)_(2)复合材料的制备及电化学性能研究  

Preparation and Electrochemical Properties of MgCo_(2)O_(4)@Co(OH)_(2) Composite Material

作　　者：倪航 胡潭伟 唐梦凡 丁悦 田玉[1] 朱小龙[1] 郑广[1] NI Hang;HU Tanwei;TANG Mengfan;DING Yue;TIAN Yu;ZHU Xiaolong;ZHENG Guang(Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education,Jianghan University,Wuhan 430056,Hubei,China)

机构地区：[1]江汉大学光电化学材料与器件教育部重点实验室,湖北武汉430056

出　　处：《江汉大学学报（自然科学版）》2024年第5期5-16,共12页Journal of Jianghan University：Natural Science Edition

基　　金：江汉大学一流学科建设重大研究专项(2023XKZ007)。

摘　　要：由于复合材料具有丰富的活性位点与良好的导电性能,已成为超级电容器电极材料的研究热点之一。通过水热和电沉积法在泡沫镍上成功制备了MgCo_(2)O_(4)@Co(OH)_(2)复合材料,采用X射线衍射(XRD)、扫描电镜(SEM)以及电化学工作站对产物进行了表征和电化学性能测试。结果表明,该复合材料作为一种无粘结剂的超级电容器电极材料在电流密度为1 mA/cm^(2)下的比电容高达3034.75 F/g;在14 mA/cm^(2)的电流密度下循环1000圈后,比电容保持了96%,展示出MgCo_(2)O_(4)作为能量存储电极材料的巨大潜力。Composite materials have become one of the hot topics for supercapacitors′electrode material because of their abundant active sites and excellent electroconductivity performance.MgCo_(2)O_(4)@Co(OH)_(2) composite material was successfully synthesized on Ni foam by hydrothermal and electrodeposition in this work.The product was characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM),and the electrochemical performance of the product was tested by the electrochemical workstation.The results showed that this MgCo_(2)O_(4)@Co(OH)_(2) composite material exhibited a maximum capacitance of 3034.75 F/g at a current density of 1 mA/cm^(2) when used as a binder-free electrode material for electrochemical capacitors.After 1000 cycles at the current density of 14 mA/cm^(2),the specific capacitance was maintained at 96%,manifesting the great potential of MgCo_(2)O_(4) as an excellent material for energy storage.

关 键 词：电沉积法 MgCo_(2)O_(4)@Co(OH)_(2)复合材料 比电容 循环性能 

分 类 号：TB383[一般工业技术—材料科学与工程]