rGO/NiCo复合材料制备及电化学性能研究

doi:10.11896/cldb.22030311

材料导报

2023, Vol. 37

Issue (18): 22030311-6 https://doi.org/10.11896/cldb.22030311

无机非金属及其复合材料

rGO/NiCo复合材料制备及电化学性能研究

颜冬仙, 樊新^*

桂林理工大学材料科学与工程学院,广西桂林 541004

Preparation and Electrochemical Performance of rGO/NiCo Composites

YAN Dongxian, FAN Xin^*

College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China

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摘要超级电容器因其能量密度大、功率密度高等优异性能而被认为是理想的储能器件,能在一定程度上有效解决能源问题。电极材料决定性影响着超级电容器的性能,而具有高理论比电容的过渡金属是人们的研究热点。镍钴双金属氧化物储能效力高,但是内阻大,导致倍率性能差。基于此,本工作利用简单的水热法成功合成rGO@Ni_xCo_y纳米复合材料,通过不断调控镍钴元素的相对比例来调整物质的形貌结构,找到其最佳比例。在所有纳米复合材料中,rGO/NiCo纳米复合材料在0.5 A/g下表现出600 F/g的优异比电容值,其组装的rGO/NiCo∥rGO柔性器件在1 A/g下的比电容为418.2 F/g,能量密度为98 Wh/kg,功率密度为1 300 W/kg,且在8 000次充放电循环后仍保持93%的比电容,同时固态柔性器件可以有效地在广泛的电压窗口中操作,优异的电化学性能预示了其在柔性超级电容器器件中的应用前景。

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	颜冬仙
	樊新

关键词: 还原氧化石墨烯镍钴双金属氧化物形貌调控超级电容器

Abstract: Supercapacitors are considered as ideal energy storage devices due to their high energy density and high power density, which can effectively solve the energy problem to a certain extent. Electrode materials have a decisive influence on the performance of supercapacitors, and transition metals with high theoretical specific capacitance are the focus of research. Nickel-cobalt bimetallic oxides have high energy storage efficiency, but high internal resistance leads to poor rate performance. Based on this, rGO@Ni_xCo_y nanocomposites were successfully synthesized by simple hydrothermal method, and the morphologic structure of the material was adjusted by constantly adjusting the relative proportion of nickel and cobalt elements to find the best proportion. Among all the nanocomposites, rGO/NiCo nanocomposites show excellent specific capacitance of 600 F/g at 0.5 A/g, and the rGO/NiCo∥rGO flexible device has specific capacitance of 418.2 F/g and energy density of 98 Wh/kg with a power density of 1 300 W/kg. Maintaining a specific capacitance of 93% after 8 000 charge-discharge cycles, the solid-state flexible device can operate efficiently in a wide range of voltage windows. Excellent electrochemical performance predicts its application in flexible supercapacitor devices.

Key words: rGO nickel-cobalt bimetallic oxide morphological control supercapacitor

出版日期: 2023-09-25 发布日期: 2023-09-18

ZTFLH:

TB33

基金资助: 广西自然科学基金((2020GXNSFAA159015)

通讯作者: *樊新,桂林理工大学材料科学与工程学院教授、博士研究生导师。2000年中南大学化学系应用化学专业本科毕业,2007年中南大学化学系应用化学专业本科毕业,2010年中南大学粉末冶金研究院材料物理与化学专业博士毕业后到桂林理工大学工作至今。目前主要从事复合材料的研究,涉及纳米结构电极材料的设计、合成及其在能量储存与转化中的应用等方面的研究工作。发表论文30余篇,包括Carbon、Appl. Surf. Sci.、Sci. Rep.、RSC Adv.、Chinese J. Chem.、Chem. Phy. Lett.、Polymers、Org. Electron.、Front. Mater. Sci.、Colloid Polym. Sci.和Mater. Tech.等。xfan@glut.edu.cn

作者简介: 颜冬仙,现为桂林理工大学材料科学与工程学院硕士研究生,在樊新教授的指导下进行研究。目前主要研究领域为超级电容器电极材料。

引用本文:

颜冬仙, 樊新. rGO/NiCo复合材料制备及电化学性能研究[J]. 材料导报, 2023, 37(18): 22030311-6.
YAN Dongxian, FAN Xin. Preparation and Electrochemical Performance of rGO/NiCo Composites. Materials Reports, 2023, 37(18): 22030311-6.

链接本文:

http://www.mater-rep.com/CN/10.11896/cldb.22030311 或 http://www.mater-rep.com/CN/Y2023/V37/I18/22030311

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