沉淀转化法制备的Co(OH)_2的超级电容特性  

Supercapacitor Characteristics of Co(OH)_2 Synthesized by Deposition Transformation

作　　者：张密林[1] 刘志祥 

机构地区：[1]哈尔滨工程大学化学工程系,哈尔滨150001

出　　处：《无机化学学报》2002年第5期513-517,共5页Chinese Journal of Inorganic Chemistry

摘　　要：Cobalt hydroxide, often used as an additive in nickel electrode, is rarely studied as active material for supercapacitors. In this paper, the Co(OH)2 with the particle size less than 20nm by deposition transformation was synthesized. Its single electrode specific capacitance was measured to be 92F·g-1, and the electrode resistance was so low that the initial potential drop when discharging is unobvious even the discharge current increased to 200mA for a 1cm2 electrode. After ten thousand cycles, Co(OH)2 on the electrode changes to Co3O4 gradually, the resistance of the electrode does not increase much, while the specific capacitance increases to 133F·g-1 at 10mA。Cobalt hydroxide, often used as an additive in nickel electrode, is rarely studied as active material for supercapacitors. In this paper, the Co(OH)2 with the particle size less than 20nm by deposition transformation was synthesized. Its single electrode specific capacitance was measured to be 92F·g-1, and the electrode resistance was so low that the initial potential drop when discharging is unobvious even the discharge current increased to 200mA for a 1cm2 electrode. After ten thousand cycles, Co(OH)2 on the electrode changes to Co3O4 gradually, the resistance of the electrode does not increase much, while the specific capacitance increases to 133F·g-1 at 10mA。

关 键 词：超级电容器 沉淀转化法 CO(OH)2 氢氧化钴 电容特性 电容活性物质 

分 类 号：TM53[电气工程—电器] TM2[一般工业技术—材料科学与工程]