交流电电解制备NiO-Ni(OH)_(2)/石墨片及其电性能研究  

Preparation and Electrical Property of NiO-Ni(OH)_(2)/Graphite Flakes by Alternating Current Electrolysis

作　　者：孙开莲[1] 杨雯婷 曹婷 王璇 毛倩倩 SUN Kailian;YANG Wenting;CAO Ting;WANG Xuan;MAO Qianqian(School of Materials and Chemical Engineering,Chuzhou University,Chuzhou,Anhui 239000,China)

机构地区：[1]滁州学院材料与化学工程学院,安徽滁州239000

出　　处：《平顶山学院学报》2023年第5期38-42,共5页Journal of Pingdingshan University

基　　金：安徽省高校自然科学基金重点项目(KJ2019A0636);滁州学院博士科研启动项目(2017qd13jz)。

摘　　要：分别以镍条和石墨棒为电极、氢氧化钠为电解液,施加交流电进行电解合成NiO-Ni(OH)_(2)/石墨片复合材料.通过XRD、SEM及(HR)TEM等对该材料进行物性表征,并研究其用作超级电容器电极的电化学性能.结果表明,经电解进入溶液中的镍离子以NiO和Ni(OH)_(2)两种晶体形式,颗粒尺寸约为70 nm均匀分散在被剥离成石墨片形成的微米束中.该复合材料做成的电极表现出优异的电化学综合性能,当充放电电流密度为20 A/g时,比容量高达1142 F/g;经2000次充放电循环后,容量保持率接近96%.材料优异的电化学性能归功于活性物质镍氧化合物颗粒纳米化以及石墨片层形成的微米束为离子和电子传输提供快速通道.NiO-Ni(OH)_(2)/graphite sheet composite was prepared by electrolysis with alternating current using nickel strip and graphite rod as two electrodes and sodium hydroxide as electrolyte.The material was characterized by XRD,SEM and TEM,and its electrochemical performance as an electrode of supercapacitor was studied.The results show that NiO and Ni(OH)_(2)crystal particles with 70 nm diameter are highly dispersed in graphite flakes.The electrical performance study showed that the composite showed excellent electrochemical comprehensive performance.When the current density was 20 A/g,the specific capacity was as high as 1142 F/g.After 2000 charge and discharge cycles,the capacity retention rate was close to 96%.The excellent electrochemistry of the material is attributed to the nanoscale of the active material nickel oxide particles and the fast ion and electron transport provided by the microbeam formed by graphite flakes.

关 键 词：交流电 电解 NiO-Ni(OH)_(2)/石墨片 超级电容器电极 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]