沉积电流对水热电沉积法制备硫/钴/镍/氧/复合物超级电容电极材料的影响研究  

Effects of Deposition Currents on S/Co/Ni/O Composite Film for Supercapacitive Electrode Prepared by Hydrothermal Electrodeposition

作　　者：雷灵均 柳乔 吴端阳 程玲 梁彩芹 张甲 Lei Lingjun;Liu Qiao;Wu Duanyang;Cheng Ling;Liang Caiqin;Zhang Jia(Shenzhen University College of Material,Shenzhen 518060;Shenzhen Key Laboratory of Special Functional Materials,Shenzhen 518060,China)

机构地区：[1]深圳大学材料学院,广东深圳518061 [2]深圳市特种功能材料重点实验室,广东深圳518061

出　　处：《广东化工》2020年第8期228-231,共4页Guangdong Chemical Industry

基　　金：国家自然科学基金:碳/碳表面强韧型掺杂HA/石墨烯涂层的超声水热电沉积新工艺基础研究(51672178)。

摘　　要：采用水热电沉积法,以碳纤维纸为正极、泡沫镍为负极,制备硫/钴/镍/氧超级电容器复合电极材料,研究了120℃下获得的薄膜在不同电流密度下(6 mA·cm^-2至10 mA·cm^-2)的形貌、组成、结构和超级电容性能的影响规律。结果表明,随沉积电流密度增大,所获得纳米片交错三维多孔结构形貌越致密,并且发生团聚形成球形颗粒倾向增大。当沉积电流密度为8 mA·cm^-2的电极材料在1 A·g^-1工作时,循环稳定性是这三种电极材料中最优异的,其质量比电容为127.8 mAh·g^-1。循环2800次后,比电容为初始比电容的80%。A composite film of the main elements such as S,Co,Ni and O etc for supercapacitors were prepared on nickel foam by a hydrothermal electrodeposition method with carbon fiber paper as the positive electrode and foamed nickel as the negative electrode.The effects of the deposition current densities from 6 mA·cm^-2 to 10 mA·cm^-2 on the morphology,structure,composition and electrochemical performance of the electrode were investigated at 120℃.The results showed that as the current density increased,the film with a three-dimensional porous structure of the nanosheets becomes denser,and the tendency of agglomeration to form spherical particles increased.This electrode material obtained at a current density of 8 mA·cm^-2 had a mass specific capacitance of 127.8 mAh·g^-1,and its cycle stability showed to be best among these three electrode materials,reaching 80%of the initial specific capacitance after 2800 cycles.

关 键 词：超级电容器 水热电沉积 硫/钴/镍/氧复合物 

分 类 号：TQ[化学工程]