电沉积液中不同镍锌比对超级电容器正极材料Ni(OH)_2电容性能的影响  

Effects of different Ni/Zn ratios of electrodepositing solution on capacitance performance of Ni(OH)_2 supercapcitor positive electrode material

作　　者：任晓敏[1] 金政[1] 秦川丽[1] 刘羽熙[1] 李博弘[1] 王淑红[1] 孙立国[1] 

机构地区：[1]黑龙江大学化学化工与材料学院功能高分子重点实验室,哈尔滨150080

出　　处：《黑龙江大学自然科学学报》2009年第5期680-683,共4页Journal of Natural Science of Heilongjiang University

基　　金：黑龙江省自然科学基金重点项目(EJG0506-01);黑龙江省教育厅2008年科学技术研究面上项目(11531265);哈尔滨市青年基金资助项目(2004AFXXJ046)

摘　　要：采用电化学共沉积技术在泡沫镍基体上直接制备掺杂Zn的Ni(OH)2电极,研究了乙醇-水体系下不同镍锌比电沉积溶液制备的电极材料的电容特性。通过XRD、SEM、EDS等测试方法对制备的电极材料进行微结构表征,并用恒流充放电、循环伏安法系统地考察其电化学性能。结果表明:所制备的电极材料为掺杂Zn的α-Ni(OH)2。当镍锌比为1∶0.0075时,循环伏安测试(扫描速率是1mV.s-1)α-Ni(OH)2电极的比电容达1906.09F.g-1。经100次恒流充放电循环后比电容衰减仅0.09%,说明电极材料具有良好的稳定性。在7.5mA.cm-2电流密度下,比电容达313.88F.g-1。The Ni（OH）2 doping with Zn was directly deposited on the surface of foam nickel by electrochemical deposition technology.Capacitance performance of electrode material was studied in the ethanol and water with different Ni/Zn ratios of electrodepositing solution.The characterization of the Ni（OH）2 electrode was studied by using X-ray diffraction（XRD）,scanning electron microscopy（SEM）,energy-dispersive spectrometry（EDS）,cyclic voltammetry（CV）and the constant charge-discharge.The results show that the product is α-Ni（OH）2 doping with Zn.The specific capacitance（1 906.09 F·g^-1 at scan rate 1 mV·s^-1）of α-Ni（OH）2 electrode is obtained at Ni/Zn ratio=1∶0.0075.The α-Ni（OH）2 electrode has excellent charge-discharge cycle stability（0.09 % loss of the specific capacitance is found at the 100th charge-discharge cycles）.The specific capacitance of α-Ni（OH）2 electrode can reach 313.88 F·g-1 at a current density of 7.5 mA·cm^-2.

关 键 词：超级电容器 Α-NI(OH)2 电沉积 电容性能 

分 类 号：TQ427.26[化学工程]