电化学法制备石墨烯/镍钴氧化物复合薄膜电极及其性能

摘要

用电化学法控电位制备石墨烯/Co₂O₃-NiO薄膜电极，通过XRD、Raman、SEM、TEM等仪器对所制备的薄膜进行表征。复合材料中Ni和Co主要以NiO和Co₂O₃的形式负载于石墨烯的表面，直径在50~200 nm之间。循环伏安测试结果表明，石墨烯/Co₂O₃-NiO复合材料性能较纯石墨烯材料明显提升。恒电流充放电测试表明，石墨烯/Co₂O₃-NiO复合材料具有高比电容，在2 A/g的电流密度下，复合材料的比电容最高达到503 F/g，循环500次后比电容保持率为91%。

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	王宏智
	姜世圣
	石玉磊
	张卫国
	姚素薇

关键词：石墨烯镍钴氧化物超级电容器电化学法

Abstract：

For the purpose of searching supercapacitor material with high property, graphene/Co₂O₃-NiO film electrode was prepared by electrochemical method, whose working potential is determined by polarization curves. Morphology and structure characterization results indicate that nickel and cobalt existing in the form of NiO and Co₂O₃. NiO and Co₂O₃ particles with diameters between 50 nm and 200 nm are distributed between and on the surface of graphene, forming a sandwich structure. Cyclic voltammetry curves indicate the performance of graphene/Co₂O₃-NiO was improved obviously, compared with that of graphene. Charge-Discharge curves suggest that its specific capacitance reached 503 F/g at a current density of 2 A/g, and the capacitance remained 91% after 500 cycles.

Keywords： graphene； nickel-cobalt oxide； supercapacitor； electrochemical

Received 2016-05-04;

Corresponding Authors: 张卫国,E-mail:zwg@tju.edu.cn。 Email: zwg@tju.edu.cn

About author: 王宏智(1973-),男,博士研究生,副教授,现从事金属基复合材料方面的研究。

引用本文:

王宏智, 姜世圣, 石玉磊, 张卫国, 姚素薇.电化学法制备石墨烯/镍钴氧化物复合薄膜电极及其性能[J]. 化学工业与工程, 2018,35(1): 63-68

Wang Hongzhi, Jiang Shisheng, Shi Yulei, Zhang Weiguo, Yao Suwei.Preparation of Graphene/Co₂O₃-NiO via Electrochemical Methods and Its Property in Supercapacitor[J]. Chemcial Industry and Engineering, 2018,35(1): 63-68

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