化工新型材料

化工新型材料 ›› 2023, Vol. 51 ›› Issue (2) : 74-80. DOI: 10.19817/j.cnki.issn1006-3536.2023.02.016

新材料与新技术

石墨烯/MnO₂纳米片复合薄膜的制备及其超级电容性能研究

作者信息 +

Study of preparation and supercapacitor performance of graphene/MnO₂ nanosheets hybrid films

He Xinjian, Jia Jinzhu, Wu Zhonghui, Yang Xiongzhi, Sun Linghao, Yang Xiaolan, Zhou Junli

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文章历史 +

Received		Published
2021-11-15		2023-02-20
Issue Date	Revised Date
2023-03-01	2021-11-15

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摘要

采用两步界面组装法制备石墨烯/MnO₂纳米片(GMTF)三维复合薄膜电极,研究了复合薄膜的电化学性能。结果表明,MnO₂的赝电容和石墨烯的双电层电容相互协调,使得GMTF复合薄膜材料比单一的MnO₂纳米片或者石墨烯材料具有更佳的电化学性能。在三电极体系中,GMTF电极的比电容在5mV/s时达156.54mF/cm²,远高于石墨烯(40.24mF/cm²)和MnO₂纳米片(69.03mF/cm²)。此外,在两电极体系中,基于GMTF复合薄膜的固态超级电容器也显示出较高的面积比电容(120.49mF/cm²)和质量比电容(204.22F/g)、优良的循环性能。在功率密度为39mW/cm³时,能量密度能够达到1.735mWh/cm³。

Abstract

Graphene/MnO₂ nanosheet (GMTF) three-dimensional hybrid film electrode was prepared by two-step interfacial assembly method,and the electrochemical properties of the hybrid film were studied.The results showed that the pseudocapacitance of MnO₂ and the electric double-layer capacitance of graphene coordinated with each other,which made GMTF hybrid film material have better electrochemical properties than single MnO₂ nanosheet or graphene material.In the three-electrode system,the specific capacitance of GMTF electrode was 156.54mF/cm² at 5mV/s,which was much higher than that of graphene (40.24mF/cm²) and MnO₂ nanosheets (69.03mF/cm²).In addition,in the two-electrode system,the solid-state supercapacitor based on GMTF hybrid film also exhibited high area specific capacitance (120.49mF/cm²),the mass specific capacitance (204.22F/g) and excellent cycle performance.When the power density was 39mW/cm³,the energy density reached to 1.735mWh/cm³.

关键词

三维导电网络 / 复合薄膜 / 柔性超级电容器

Key words

3D conductive network / thin film / flexible supercapacitors

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石墨烯/MnO₂纳米片复合薄膜的制备及其超级电容性能研究[J]. 化工新型材料, 2023, 51(2): 74-80 DOI:10.19817/j.cnki.issn1006-3536.2023.02.016

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