Microwave-assisted synthesis of spherical β-Ni(OH)2 superstructures for electrochemical capacitors with excellent cycling stability

被引：25

作者：

Mondal, Anjon Kumar ^{[1
]}

Su, Dawei ^{[1
,2
]}

Chen, Shuangqiang ^{[1
]}

Zhang, Jinqiang ^{[1
]}

Ung, Alison ^{[1
]}

Wang, Guoxiu ^{[1
]}

机构：

[1] Univ Technol Sydney, Ctr Clean Energy Technol, Sch Chem & Forens Sci, Sydney, NSW 2007, Australia

[2] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia

来源：

CHEMICAL PHYSICS LETTERS | 2014年 / 610卷

基金：

澳大利亚研究理事会;

关键词：

NICKEL-HYDROXIDE; HYDROTHERMAL SYNTHESIS; POSITIVE-ELECTRODE; HOLLOW SPHERES; PERFORMANCE; SUPERCAPACITOR; NANOSTRUCTURES; NI(OH)(2); TRANSITION; TEMPLATE;

D O I：

10.1016/j.cplett.2014.07.025

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：

A novel single-step microwave-assisted process has been developed to synthesize spherical beta-Ni(OH)(2) superstructures without using any templates. Structure characterizations show that the spherical beta-Ni(OH)(2) composed of twisted nanosheets was obtained. The electrochemical properties of the as-prepared materials were evaluated by cyclic voltammetry and chronopotentiometry technology in 2 M KOH solution. Due to the unique morphology, the prepared beta-Ni(OH)(2) electrode displays a high specific capacitance of 2147 F g(-1) at a discharge current of 1 A g(-1) and outstanding cycling stability (99.5% capacitance retained after 2000 cycles), suggesting its potential application as an efficient electrode material for high-performance electrochemical capacitors. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：115 / 120

页数：6

共 49 条

[1] Synthesis, characterization, and electrochemical properties of ultrafine β-Ni(OH)2 nanoparticles [J].