Hierarchical NiCo2O4 Nanosheets@halloysite Nanotubes with Ultrahigh Capacitance and Long Cycle Stability As Electrochemical Pseudocapacitor Materials

被引：197
作者：
Liang, Jin [1 ,2 ,3 ]
Fan, Zhaoyang [1 ,2 ,3 ]
Chen, Sheng [1 ,2 ,3 ]
Ding, Shujiang [1 ,2 ,3 ]
Yang, Guang [4 ,5 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, MOE Key Lab Nonequilibrium Synth & Modulat Conden, Xian 710049, Peoples R China
[3] Xi An Jiao Tong Univ, Dept Appl Chem, Sch Sci, Xian 710049, Peoples R China
[4] Xi An Jiao Tong Univ, Elect Mat Res Lab, Key Lab, Minist Educ, Xian 710049, Peoples R China
[5] Xi An Jiao Tong Univ, Int Ctr Dielect Res, Xian 710049, Peoples R China
来源：
CHEMISTRY OF MATERIALS | 2014年 / 26卷 / 15期
基金：
中国国家自然科学基金;
关键词：
HIGH-PERFORMANCE; SUPERCAPACITOR APPLICATIONS; NICKEL COBALTITE; NANOSTRUCTURES; ELECTRODES; NANOWIRES; SURFACE; GROWTH; SHELL; OXIDE;
D O I：
10.1021/cm500786a
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：
One-dimensional hierarchical nanostructure of NiCo2O4 nanosheets@halloysite nanotubes was successfully prepared through a facile coprecipitation method followed by a thermal annealing treatment. The microstructure and chemical composition of NiCo2O4 nanosheets@halloysite nanotubes are investigated by SEM, TEM, HRTEM, XRD, and XPS. The specific capacitance of the unique NiCo2O4 nanosheets@ halloysite nanotubes is 1728 F g(-1) at the end of 8600 cycles when the charge-discharge current density is 10 A g(-1) leading to only 5.26% capacity loss. Broadly, the as-obtained NiCo2O4 nanosheets@halloysite nanotubes reveal ultrahigh capacitance and remarkable cycling stability in virtue of the ultrathin and hierarchical nanosheets and intense cation/anion exchange performance of halloysite.
引用
收藏
页码：4354 / 4360
页数：7
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