Co(OH)2/rGO电极储能动力学实验设计  

Experimental design on energy storage dynamics of Co(OH)2/rGO electrode

作　　者：李文坡[1] 郝江瑜 杨欣 王士超 敖勋 LI Wenpo;HAO Jiangyu;YANG Xin;WANG Shichao;AO Xun(School of Chemistry and Chemical Engineering,Chongqing University,Chongqing 401331,China)

机构地区：[1]重庆大学化学化工学院,重庆401331

出　　处：《实验技术与管理》2020年第5期69-73,共5页Experimental Technology and Management

基　　金：重庆市自然科学基金项目(cstc2019jcyj-msxmX0347);重庆大学教学改革研究项目(2019Y51,2019Y54)。

摘　　要：随着能源在现代社会的作用日益凸显,储能电极材料的研究越来越受到关注。越来越多的新型电极材料显示出既不是纯电容性(超级电容器,表面电容控制)也不是纯法拉第性(电池,扩散控制)的电化学特性。为了阐明电极的这2种电化学储能行为差异,该文采用在实验课堂上就可以进行的简单快速的方法制得Co(OH)2/还原氧化石墨烯(rGO)复合电极。在1 mol/L KOH水溶液体系中,对该电极进行了不同小扫速下的循环伏安测试(CV)。根据电流i与扫速v的幂律关系对电极反应的表面控制与扩散控制贡献进行定量计算,并探讨其与Co(OH)2电极在相同测试条件下的电化学行为差异。该实验将当前的储能研究热点整合成一个物理化学实验,有利于学生学会电池材料、超级电容器材料及其储能原理等相关概念,掌握电极材料储能动力学分析方法和原理,学习一种储能电极材料的制备方法,由此激发学生科学研究的兴趣。As energy plays an increasingly important role in modern society,the research of energy storage electrode materials has attracted more and more attention.More and more new electrode materials show electrochemical properties that are neither pure capacitive(supercapacitors,surface capacitance control),nor pure Faraday(batteries,diffusion control).In order to clarify the differences between the two electrochemical energy storage behaviors of electrodes,the Co(OH)2/reduced graphene oxide(rGO)composite electrode is prepared by a simple and fast method which can be carried out in the experimental classroom.Co(OH)2/rGO composite electrode is performed in 1 mol/L KOH aqueous solution by cyclic voltammetry(CV)at different scanning speeds.According to the power-law relationship between current i and sweep velocity v,the contribution of surface capacitance control and diffusion control of electrode reaction is calculated quantitatively.The difference of electrochemical behavior between Co(OH)2/rGO and Co(OH)2 electrode under the same test condition is discussed.The experiment is to integrate current research hotspots of energy storage into a physical chemistry experiment.This can help students to learn battery materials,supercapacitor materials and its related concepts such as the energy storage principle,dynamic analysis method and principle of electrode material storage,and preparation method of electrode materials for energy storage.Thus,the students’interest in scientific research is aroused.

关 键 词：物理化学实验 材料科学 循环伏安 表面电容控制 扩散控制 动力学 

分 类 号：G642.423[文化科学—高等教育学] O646.6[文化科学—教育学]