Co3O4@MnMoO4复合电极材料的制备及其超级电容性能研究  

Preparation and supercapacitor characteristics of Co3O4@MnMoO4 as an electrode material

作　　者：崔丹凤[1] 李渊凯 范燕云 范正 陈红梅 薛晨阳[1] CUI Danfeng;LI Yuankai;FAN Yanyun;FAN Zheng;CHEN Hongmei;XUE Chenyang(Key Laboratory of Instrumentation Science&Dynamic Measurement,Ministry of Education,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室,太原030051

出　　处：《功能材料》2020年第10期10202-10208,10215,共8页Journal of Functional Materials

基　　金：国家杰出青年科学基金资助项目(61525107);山西省青年科学基金资助项目(201801 D221197)。

摘　　要：采用两步水热法制备了以泡沫镍作为基底的Co3O4@MnMoO4复合材料,利用SEM、TEM、XRD、比表面积分析仪分别对材料的形貌、尺寸和结构与纯Co3O4纳米棒团簇进行了对比。在2.5 mAcm^-2的电流密度下,Co3O4和Co3O4@MnMoO4作为电极时的比电容分别为436和663.75 F/g。与Co3O4纳米棒团簇相比,Co3O4@MnMoO4复合材料具有更好的电容性能和良好的超级电容器应用潜力。这是由于其具有比Co3O4纳米棒团簇更高的电子/离子转移速率、更多的电活性反应位点和更大的电解质浸润面积。Co3O4@MnMoO4 composites on nickel(Ni)foam were first synthesized by a two-step hydrothermal process and exhibited better electrochemical properties than pure Co3O4 nanorod clusters according to the electrochemical test.The specific capacities of the Co3O4 and Co3O4@MnMoO4 electrodes were 436 F/g and 663.75 F/g,respectively at a current density of 2.5 mA/cm^2.After 3000 cycles,Co3O4 and Co3O4@MnMoO4 electrodes retained 100%and 95.32%of the initial specific capacities,respectively,at a current density of 3 A/g.The great capacitive property of Co3O4@MnMoO4 composites was attributed to their specific area,which led to a higher electron/ion-transfer rate,more electroactive reaction sites and larger electrolyte infiltrate area than Co3O4 nanorod clusters.

关 键 词：Co3O4@MnMoO4 超级电容器 水热法 电化学 

分 类 号：TB332[一般工业技术—材料科学与工程]