MnFe2O4电极的制备及其在赝电容器中的应用  

Preparation of MnFe2O4 Electrode and Its Application in Pseudocapacitors

作　　者：闫伟 禚凯 李艳萍 Yan Wei;Zhuo Kai;Li Yanping(Micro-Nano System Research Center,College of Information and Computer,Taiyuan University of Technology,Jinzhong 030600,China)

机构地区：[1]太原理工大学信息与计算机学院微纳系统研究中心,山西晋中030600

出　　处：《微纳电子技术》2020年第7期521-525,540,共6页Micronanoelectronic Technology

基　　金：国家自然科学基金资助项目(61703298);山西省自然科学基金面上自然基金项目(201801D121146);山西省高等学校科技创新项目(201802029)。

摘　　要：以醋酸锰和氯化铁为原料、醋酸钠为沉淀剂,采用共沉淀法制备无黏合剂的铁酸锰(MnFe2O4)电极。通过扫描电子显微镜(SEM)对材料的微观结构和形貌进行表征,MnFe2O4是纳米片和纳米线的复合结构,具有大的比表面积和与电解质的接触反应面积。在三电极的体系中,使用循环伏安法、恒电流充放电和电化学阻抗谱测试分析电极的性能。结果表明MnFe2O4电极具有优异的电化学性能和长期循环稳定性。MnFe2O4电极在1 A/g的电流密度下的比电容为157.6 F/g。MnFe2O4电极在2000次循环充放电后,电容保持率为102%。该实验提供了一种无黏合剂、高比电容和循环性能好的赝电容电极。With manganese acetate and ferric chloride as raw materials and sodium acetate as precipitant,a binder-free manganese ferrite(MnFe2O4)electrode was prepared by coprecipitation method.The microstructure and morphology of the material were characterized by scanning electron microscope(SEM).MnFe2O4 is a composite structure of nanosheets and nanowires with large specific surface area and contact reaction area with electrolyte.In a three-electrode system,the performances of the electrode were tested and analyzed by using cyclic voltammetry method,galvanostatic charge-discharge method and electrochemical impedance spectroscopy.The results show that the MnFe2O4 electrode has excellent electrochemical performance and long-term cycle stability.The specific capacitance of the MnFe2O4 electrode is 157.6 F/g at a current density of1 A/g.After MnFe2O4 electrode is charged and discharged in2000 cycles,the capacitance retention rate is 102%.The binder-free pseudocapacitor electrode with high specific capacitance and good cycling performance was obtained by the experiment.

关 键 词：二氧化锰(MnO2) 铁酸锰(MnFe2O4) 共沉积 赝电容器 电极材料 

分 类 号：TM53[电气工程—电器]