Controllable synthesis of porous nickel-cobalt oxide nanosheets for supercapacitors

被引:207
|
作者
Lu, Xihong [1 ]
Huang, Xi [1 ]
Xie, Shilei [1 ]
Zhai, Teng [1 ]
Wang, Chengsheng [1 ]
Zhang, Peng [1 ]
Yu, Minghao [1 ]
Li, Wei [1 ]
Liang, Chaolun [2 ]
Tong, Yexiang [1 ]
机构
[1] Sun Yat Sen Univ, MOE Lab Bioinorgan & Synthet Chem, Key Lab Environm & Energy Chem,Inst Optoelect & F, Guangdong Higher Educ Inst,Sch Chem & Chem Engn, Guangzhou 510275, Guangdong, Peoples R China
[2] Sun Yat Sen Univ, Instrumental Anal & Res Ctr, Guangzhou 510275, Guangdong, Peoples R China
关键词
NANOWIRE ARRAYS; ELECTROCHEMICAL CAPACITORS; OXYGEN EVOLUTION; PERFORMANCE; NANOPARTICLES; TEMPERATURE; ELECTRODES;
D O I
10.1039/c2jm30927k
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Vertically aligned nickel-cobalt oxide (NCO) nanosheets with porous structure were successfully synthesized on FTO substrates by a simple electrochemical method without any templates. Cyclic voltammetry (CV) and galvanostatic charge/discharge measurements show that the porous NCO nanosheets have an ideal capacitive performance and long-term stability. With an optimum amount of Ni, the specific capacitance for the NCOs could reach as high as 453 F g(-1) at a scan rate of 5 mV s(-1) and 506 F g(-1) at a current density of 1 A g(-1), showing an improvement of around 50% compared with cobalt oxide. Furthermore, a symmetric supercapacitor based on two NCO electrodes exhibits a maximum specific capacitance of 89.2 F g(-1) at 0.17 A g(1).
引用
收藏
页码:13357 / 13364
页数:8
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