水热电沉积法生长Co_9S_8薄膜电极  

Hydrothermal Electrochemical Deposition Synthesis of Co_9S_8 Film Electrode

作　　者：陈婕 黎晓华[1] 熊信柏[1] 马俊[1] 曾燮榕[1] 李均钦[1] 汤皎宁[1] 钱海霞[1] Chen Jie;Li Xiaohua;Xiong Xinbo;Ma Jun;Zeng Xierong;Li Junqin;Tang Jiaoning;Qian Haixia(Shenzhen Key Laboratory of Special Functional Materials,Shenzhen University,Shenzhen 518060,China)

机构地区：[1]深圳大学深圳市特种功能材料重点实验室,广东深圳518060

出　　处：《稀有金属材料与工程》2019年第3期967-972,共6页Rare Metal Materials and Engineering

基　　金：广东省自然科学基金(2015A030313559);广东省高等教育教学改革项目(GDJG20142288)

摘　　要：采用水热电沉积法在泡沫镍基体上原位沉积Co_9S_8薄膜,并对其形貌、组成、结构和电化学性能进行表征和测试。结果表明,镍基Co_9S_8薄膜呈花瓣片状,并具有优异的电化学性能,其在电流密度为10mA/cm^2时,比电容可高达2538.7 F/g。即使电流密度扩大至50 mA/cm^2时,比电容依然可达1930.7 F/g。经过1000次循环(电流密度为20 mA/cm2),比电容仍可达为1825.2 F/g,电容保有率72.8%,经过1500次循环后,电容保有率61.4%。A Co9S8 film was in-situ deposited onto nickel foam substrate by a hydrothermal electrochemical deposition method.The morphology,composition and structure of the as-prepared film were characterized and the electrochemical performances were tested.The result show that the as-synthesized Co9S8 film displays a petal-like morphology and possesses excellent capacitive behavior with a specific capacitance of 2538.7 F/g at a discharge current density of 10 mA/cm^2,which remains to be 1930.7 F/g even at a higher density of 50mA/cm2.After 1000 cycles at 20 mA/cm^2,a specific capacitance of 1825.2 F/g still remains,and the capacitance retention is calculated to be 72.8%.Even after 1500 cycles,a specific capacitance retention of 61.4%can be retained.

关 键 词：水热电沉积法 超级电容器 Co9S8薄膜 

分 类 号：TB43[一般工业技术]