摘要
采用化学沉淀法制备Ni(OH)2,组装的氢氧化镍超级电容器在0.1A/g的电流密度下,首次放电比电容为206.6F/g,等效串联电阻为25.6Ω,能量密度为9.97W·h/kg。由于Ni(OH)2的氧化还原反应进行得充分彻底,所以等效串联电阻小,比电容和能量密度均高于活性炭超级电容器。复合超级电容器的各项储能性能均介于两者之间。当电流密度增大到0.6A/g时,活性炭超级电容器被击穿,而复合超级电容器和氢氧化镍超级电容器在1A/g时的比电容仍然高于160F/g,倍率性能较好。
Ni(OH)2 was prepared using chemical precipitation method,the first discharge specific capacitance of the nickel hydroxide super capacitor under the current density of 0.1A/g was 206.6F/g,the equivalent series resistance was 25.6Ω,the energy density was 9.97W·h/kg.Because the redox reaction of Ni(OH)2 was fully and completely carried out,the equivalent series resistance was small,and the specific capacitance and energy density were higher than that of activated carbon supercapacitor.The energy storage performance of composite supercapacitor was between the two.In addition,when the current density increased to 0.6A/g,activated carbon supercapacitors broke down,while the specific capacitance of composite capacitors and nickel hydroxide capacitors was still higher than 160F/g at 1A/g,with better rate performance.
作者
李喆
杨少华
赵平
LI Zhe;YANG Shaohua;ZHAO Ping(Shenyang Ligong University,Shenyang 110159,China)
出处
《沈阳理工大学学报》
CAS
2019年第4期70-74,共5页
Journal of Shenyang Ligong University
关键词
氢氧化镍
活性炭
超级电容器
比电容
Ni(OH)2
activated carbon
supercapacitors
specific capacitance
