纳米Ni_xCo_(1-x)O的制备及超级电容的性能  

Ni_xCo_(1-x)O Prepared by Combining Co-precipitation and Roasting and the Properties of Supercapacitors

作　　者：刘丽英[1] 张海燕[1] 刘炳容[1] 陈列春[1] 陈易明[1] 

机构地区：[1]广东工业大学材料与能源学院,广东广州510006

出　　处：《广东工业大学学报》2008年第3期18-20,共3页Journal of Guangdong University of Technology

摘　　要：以NiSO4.6H2O和Co(NO3)2.6H2O为原料,采用共沉淀-焙烧相结合的方法进行超级电容器用电极材料NixCo1-xO的制备研究.结合恒流充放电、XRD和SEM测试手段,考察了Ni/Co物质的量比、沉淀剂、氨水添加剂对合成产物物理及电化学性能的影响.实验结果表明:n(Ni)∶n(Co)=9∶1,采用NaOH作为沉淀剂,并且适量添加NH3.H2O的条件下,获得纳米级NixCo1-xO,该材料的综合电化学性能最佳,200周期的比电容达到39.37 F/g,1 000次充放电后电容保持率在90%以上.NixCo1-xO for supercapacitors was prepared by combining co-precipitation and roasting, with NiSO4 · 6H2O and Co（ NO3 ）2 · 6H2O as raw materials. The influences of Ni/Co molar ratio, precipitator and NH3 · H2O additive on physical and electrochemical performances were studied through XRD, SEM and charge-discharge tests, etc. The results show that nano-materials are obtained under the conditions of NaOH as precipitators, n （NH3 · H2O）： n（NaOH） = 1：10 and n（Ni）： n（Co） =9： 1, the 200^th specific capacity reaches 39.37 F/g, and it remains above 90% after 1 000 cycles.

关 键 词：超级电容器 比电容 共沉淀 NI Cox1-xO 

分 类 号：TM53[电气工程—电器]