氢氧化镍/还原氧化石墨烯复合材料的制备及其电化学性能

人工晶体学报 ›› 2021, Vol. 50 ›› Issue (5): 915-919.

氢氧化镍/还原氧化石墨烯复合材料的制备及其电化学性能

张杰

衡水学院应用化学系,衡水 053000

收稿日期:2021-02-03 出版日期:2021-05-15 发布日期:2021-06-15
作者简介:张杰(1982—),女,河北省人,讲师。E-mail:chinazj_2010@126.com
基金资助:
2021年度河北省高等学校科学技术研究项目(ZC2021238);衡水市科技局项目(2020011008Z);衡水学院校级科研课题(2020ZR21)

Preparation and Electrochemical Properties of Nickel Hydroxide/Reduced Graphene Oxide Composites

ZHANG Jie

Department of Applied Chemistry, Hengshui University, Hengshui 053000, China

Received:2021-02-03 Online:2021-05-15 Published:2021-06-15

摘要/Abstract

摘要： 以六水合硝酸镍和氧化石墨烯为原料,多孔泡沫镍为基底,尿素为沉淀剂,十六烷基三甲基溴化铵(CTAB)为分散剂,采用简单的一步水热还原法,制备Ni(OH)₂/RGO复合电极材料。对制备得到的Ni(OH)₂/RGO电极材料进行形貌结构表征,并通过循环伏安(CV)和恒电流充放电(GCD)测试研究了材料的电化学性能。通过X射线衍射(XRD)分析确定了Ni(OH)₂和Ni(OH)₂/RGO的晶型,SEM结果表明,丝绸状还原氧化石墨烯片有效且均匀地分布在Ni(OH)₂层的表面,在水热过程中Ni(OH)₂片原位生长在泡沫镍上,形成三维多孔多层多样化结构。与纯Ni(OH)₂相比,1 A/g下纯Ni(OH)₂的比电容为1 930 F/g,而Ni(OH)₂/RGO比电容高达2 508 F/g。这些结果表明Ni(OH)₂/RGO是一种很有前途的超级电容器电极候选材料。

关键词: 还原氧化石墨烯, 氢氧化镍, 电极材料, 超级电容器, 协同效应

Abstract: Ni(OH)₂/RGO composite electrode materials were prepared from nickel nitrate and graphene oxide by one-step hydrothermal reduction using porous nickel foam as substrate, urea as precipitant and hexadecyl trimethyl ammonium bromide (CTAB) as dispersant. The morphology and structure of Ni(OH)₂/RGO electrode materials were characterized, and the electrochemical properties of the materials were investigated by cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) tests. The crystal forms of Ni(OH)₂ and Ni(OH)₂/RGO were determined by X-ray diffraction (XRD) analysis. SEM images show that the silky RGO sheets are effectively and uniformly distributed on the surface of Ni(OH)₂ layer. During the hydrothermal process, Ni(OH)₂ sheets grow in situ on the nickel foam, forming a three-dimensional porous multi-layer diversified structure. Compared with pure Ni(OH)₂, the specific capacitance of pure Ni(OH)₂ at 1 A/g is 1 930 F/g and the specific capacitance of Ni(OH)₂/RGO is 2 508 F/g. These results indicate that Ni(OH)₂/RGO is a promising electrode candidate material for supercapacitor.

Key words: reduction of graphene oxide, nickel hydroxide, electrode material, supercapacitor, synergistic effect

中图分类号:

O646

张杰. 氢氧化镍/还原氧化石墨烯复合材料的制备及其电化学性能[J]. 人工晶体学报, 2021, 50(5): 915-919.

ZHANG Jie. Preparation and Electrochemical Properties of Nickel Hydroxide/Reduced Graphene Oxide Composites[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(5): 915-919.

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