MnO_(2)/MCMB复合材料的制备及其超级电容器性能的研究  

Preparation of MnO_(2)/MCMB materials and study of their supercapacitor properties

作　　者：李建科 苗信成 高宏亮 杨春杰[1] 张大奎 徐桂英[1] 周卫民 王坤 LI Jianke;MIAO Xincheng;GAO Hongliang;YANG Chunjie;ZHANG Dakui;XU Guiying;ZHOU Weimin;WANG Kun(School of Chemical Engineering,University of Science and Technology Liaoning,Anshan 114051,China;School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China;Angang Chemical Technology Co.,Ltd.,Anshan 114000,China)

机构地区：[1]辽宁科技大学化学工程学院,辽宁鞍山114051 [2]辽宁科技大学材料与冶金学院,辽宁鞍山114051 [3]鞍钢化学科技有限公司,辽宁鞍山114011

出　　处：《辽宁科技大学学报》2024年第4期249-257,共9页Journal of University of Science and Technology Liaoning

基　　金：国家自然科学基金资助项目(51672117、51672118)。

摘　　要：为了进一步提高MnO_(2)作为超级电容器电极材料的性能,本文采用简单的一步水溶剂法将MnO_(2)与经KOH活化后的中间相炭微球(MCMB)复合,制备一系列具有赝电容储能行为的MnO_(2)/MCMB复合材料。采用XRD、Raman、XPS、SEM对其进行结构和形貌表征。结果表明,MnO_(2)/MCMB材料依然保持着MCMB的球型结构,MnO_(2)的生成影响了复合材料中MCMB的石墨化程度以及碳层间距。将MnO_(2)/MCMB复合材料组装为对称型超级电容器,测试结果表明,MnO_(2)/MCMB电极材料在1 A/g的电流密度下的质量比电容最高为844 F/g,能量密度和功率密度最高分别为32.11 W·h/kg和500 W/kg。To enhance the potential application of MnO_(2)as an electrode material for supercapacitors,a series of MnO_(2)/MCMB composites(mesocarbon microbeads(MCMB)loaded with MnO_(2)nanoparticles)with the pseudocapacitor energy storage behavior were synthesized utilizing a simple one-step hydrothermal method.The structural and morphological characteristics of the synthesized MnO_(2)/MCMB composites were conducted using XRD,Raman,XPS,and SEM techniques.The results indicate that the MnO_(2)/MCMB material maintains the spherical shape of MCMB,and the generation of MnO_(2)impacts the graphitization degree and carbon layer spacing of MCMB.When MnO_(2)/MCMB electrodes were assembled as a symmetric supercapacitor,possessing a maximum specific capacitance of 844 F/g at a current density of 1 A/g.Moreover,the supercapacitor exhibited the highest energy density of 32.11 W·h/kg and power density of 500 W/kg,respectively.

关 键 词：MnO_(2) 超级电容器 赝电容储能 中间相炭微球 

分 类 号：O484.4[理学—固体物理]