NiCo2O4/RGO复合材料的制备及其电化学性能

兰州理工大学学报 ›› 2021, Vol. 47 ›› Issue (5): 162-166.

NiCo₂O₄/RGO复合材料的制备及其电化学性能

王青^*1,2, 耿文博¹, 戴剑锋^1,2, 李维学^1,2, 高姗姗¹

1.兰州理工大学理学院, 甘肃兰州 730050;
2.兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室, 甘肃兰州 730050

收稿日期:2020-12-11 出版日期:2021-10-28 发布日期:2021-11-18
通讯作者: 王青(1965-), 女,江苏扬州人,教授.Email:wangqing@lut.edu.cn
基金资助:
国家自然科学基金(11664023)

Study on preparation of NiCo₂O₄/RGO composite material and its electrochemical performance

WANG Qing^1,2, GENG Wen-bo¹, DAI Jian-feng^1,2 , LI Wei-xue^1,2, GAO Shan-shan¹

1. School of Science, Lanzhou Univ. of Tech., Lanzhou 730050, China;
2. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou Univ. Of Tech., Lanzhou 730050, China

Received:2020-12-11 Online:2021-10-28 Published:2021-11-18

摘要/Abstract

摘要： 采用两步水热法制备NiCo₂O₄/RGO复合材料,并对其电化学性能进行研究.研究结果表明,当电流密度为1 A/g时,NiCo₂O₄/RGO复合材料的比电容高达2 332.40 F/g,约是NiCo₂O₄材料的3倍,当电流密度增加至10 A/g时,其比电容还能保持为1 127.22 F/g,表现出优异的倍率性能.这归因于复合材料特殊的多孔蓬松结构,有效增加了材料的比表面积,NiCo₂O₄的比表面积为56.488 0 cm²/g,而NiCo₂O₄/RGO复合材料的比表面积高达188.604 2 cm²/g,能够提供更多的反应活性位点,同时RGO能够有效提高材料的导电性,两者之间的协同作用使得电化学性能大幅提升.

关键词: 超级电容器, NiCo₂O₄/RGO, 电化学, 复合材料

Abstract: The NiCo₂O₄/RGO composite material was prepared by a two-step hydrothermal method and its electrochemical performance was studied. The research results showed that when the current density was 1 A/g, the specific capacitance of NiCo₂O₄/RGO composite material was as high as2 332.40 F/g, which was about three times that of NiCo₂O₄ material. When the current density was increased to 10 A/g, its specific capacitance could be maintained 1 127.22 F/g, showing excellent rate performance. Due to the special porous and fluffy structure of the composite material, the specific surface area of the material is effectively increased. The specific surface area of NiCo₂O₄ is 56.488 0 cm²/g, while the specific surface area of NiCo₂O₄/RGO composite material is as high as 188.604 2 cm²/g, which can provide more reactive sites, at the same time, RGO can effectively improve the conductivity of the material, thereby, the electrochemical performance is greatly improve.

Key words: supercapacitor, NiCo₂O₄/RGO, electrochemistry, composite material

中图分类号:

O469

王青, 耿文博, 戴剑锋, 李维学, 高姗姗. NiCo₂O₄/RGO复合材料的制备及其电化学性能[J]. 兰州理工大学学报, 2021, 47(5): 162-166.

WANG Qing, GENG Wen-bo, DAI Jian-feng , LI Wei-xue, GAO Shan-shan. Study on preparation of NiCo₂O₄/RGO composite material and its electrochemical performance[J]. Journal of Lanzhou University of Technology, 2021, 47(5): 162-166.

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NiCo₂O₄/RGO复合材料的制备及其电化学性能

Study on preparation of NiCo₂O₄/RGO composite material and its electrochemical performance

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