纳米片层状氢氧化钴/泡沫镍复合材料的超级电容性能研究
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摘要
本文在2.3 V电压、30 mA电流、120 s沉积时间条件下,采用控电位电沉积方法在泡沫镍基体上沉积Co(OH)_2制备了复合电极材料并研究了其超电容性能。结果表明:所获得的复合电极材料表面为纳米片层状Co(OH)_2,且保留了泡沫镍的三维网状结构。这一结构促进了电极活性物质与电解液之间的充分接触以及离子在电极体相中的吸附与脱附,使复合材料具有优异的超电容特性,比电容值高达975.8 F/g(50 mV/s),内阻仅为0.74Ω。
The nano-flake Co(OH)_2/Ni foam composite electrode was prepared by electrodepositing Co(OH)_2 on the surface of nickel foam at the conditions of potential of 2.3 V, current of 30 mA and deposition time of 120 s. The electrochemical performance of the composite electrode is excellent due to the 3D and nano-flake superstructure, which ensure the contact of active material with electrolyte and facilitate the adsorption/desorption of ions in the electrode solution. The electrode owns the highest specific capacitance of 975.8 F/g at 50 mV /s, and the resistance is only 0.74 ?.
The nano-flake Co(OH)_2/Ni foam composite electrode was prepared by electrodepositing Co(OH)_2 on the surface of nickel foam at the conditions of potential of 2.3 V, current of 30 mA and deposition time of 120 s. The electrochemical performance of the composite electrode is excellent due to the 3D and nano-flake superstructure, which ensure the contact of active material with electrolyte and facilitate the adsorption/desorption of ions in the electrode solution. The electrode owns the highest specific capacitance of 975.8 F/g at 50 mV /s, and the resistance is only 0.74 ?.
引文
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[12]张永起,夏新辉,康婧,等.多孔氢氧化钴薄膜的制备及其超级电容器性能[J].科学通报,2012,57(27):2644-2648.
[13]张密林,刘志祥.沉淀转化法制备的Co(OH)2的超级电容特性[J].无机化学学报,2002,18(5):513-517.
[14]YANG J,LIU HW,MARTENS WN,et al.Synthesis and characterization of cobalt hydroxide,cobalt oxyhydroxide,and cobalt oxide nanodises[J].Journal of Physical Chemistry C,2009,114(1):8071-8084.
[15]XU CL,YANG GW,LI HL.Electrodeposited nickel hydroxide on nickel foam with ultrahigh capacitance[J].Chemical Communications,2008,48:6537-6539.
[2]刘春娜.超级电容器应用展望[J].电源技术,2010,34(9):979-980.
[3]朱磊,吴伯荣,陈晖,等.超级电容器研究及其应用[J].稀有金属,2003,27(3):385-390.
[4]张国驹,唐西胜,齐智平.超级电容器与蓄电池混合储能系统在微网中的应用[J].电力系统自动化,2010,34(12):85-89.
[5]牛强,张孝彬,程继鹏,等.多孔纳米碳纤维的制备及其在超级电容器中的应用研究[J].功能材料,2009,40(2):314-316.
[6]WANG GP,ZHANG L,ZHANG JJ.A review of electrode materials for electrochemical supercapacitors[J].Chemical Society Reviews,2012,41(2):797-828.
[7]于维平,杨晓萍,孟令款,等.电沉积法制备掺杂钴的氢氧化镍电极材料及其容量特性[J].材料热处理学报,2005,26(6):30-33.
[8]闻俊峰,蒋亚东,杨亚杰,等.化学气相沉积导电聚合物复合纳米薄膜及性能[J].功能材料,2014,45(16):16101-16106.
[9]ZHENG JP,CYGEN PJ,JOW TR.Hydrous ruthenium oxide as an electrode material for electrochemical capacitors[J].Journal of Electrochemical Society,1995,142:2699-2703.
[10]杨幼平,赵世兴,黄可龙,等.α-Co(OH)2的合成及其电化学电容行为[J].中国有色金属学报,2008,18(E01):326-330.
[11]叶向果,张校刚,王兴磊,等.均匀沉淀法制备Co(OH)2及其超电容特性[J].无机化学学报,2007,23(10):1729-1732.
[12]张永起,夏新辉,康婧,等.多孔氢氧化钴薄膜的制备及其超级电容器性能[J].科学通报,2012,57(27):2644-2648.
[13]张密林,刘志祥.沉淀转化法制备的Co(OH)2的超级电容特性[J].无机化学学报,2002,18(5):513-517.
[14]YANG J,LIU HW,MARTENS WN,et al.Synthesis and characterization of cobalt hydroxide,cobalt oxyhydroxide,and cobalt oxide nanodises[J].Journal of Physical Chemistry C,2009,114(1):8071-8084.
[15]XU CL,YANG GW,LI HL.Electrodeposited nickel hydroxide on nickel foam with ultrahigh capacitance[J].Chemical Communications,2008,48:6537-6539.