Controllable synthesis of layered Co-Ni hydroxide hierarchical structures for high-performance hybrid supercapacitors

被引：22

作者：

Yuan, Peng ^{[1
,2
,3
]}

Zhang, Ning ^{[2
]}

Zhang, Dan ^{[1
]}

Liu, Tao ^{[1
,2
]}

Chen, Limiao ^{[1
]}

Ma, Renzhi ^{[2
]}

Qiu, Guanzhou ^{[1
]}

Liu, Xiaohe ^{[1
,2
,3
]}

机构：

[1] Cent S Univ, Dept Inorgan Mat, Changsha 410083, Hunan, Peoples R China

[2] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

[3] Cent S Univ, Inst Mat Microstruct, Changsha 410083, Hunan, Peoples R China

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2016年 / 88卷

基金：

中国国家自然科学基金;

关键词：

Inorganic compounds; Nanostructures; Chemical synthesis; Electrochemical properties; ELECTRODE MATERIALS; NICO2O4; NANOSHEETS; COBALT HYDROXIDE; GROWTH; NANOPARTICLES; MICROSPHERES; SPHERES;

D O I：

10.1016/j.jpcs.2015.09.006

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A facile solvothermal method is developed for synthesizing layered Co-Ni hydroxide hierarchical structures by using hexamethylenetetramine (HMT) as alkaline reagent. The electrochemical measurements reveal that the specific capacitances of layered bimetallic (Co-Ni) hydroxides are generally superior to those of layered monometallic (Co, Ni) hydroxides. The as-prepared Co0.5Ni0.5 hydroxide hierarchical structures possesses the highest specific capacitance of 1767 F g(-1) at a galvanic current density of 1 A g(-1) and an outstanding specific capacitance retention of 87% after 1000 cycles. In comparison with the dispersed nanosheets of Co-Ni hydroxide, layered hydroxide hierarchical structures show much superior electrochemical performance. This study provides a promising method to construct hierarchical structures with controllable transition-metal compositions for enhancing the electrochemical performance in hybrid supercapacitors. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：8 / 13

页数：6