Facile synthesis and capacitive characteristics of Co(OH)2 nanoflakes via a solid-reaction route at room temperature

被引：18
作者：
Gong, Liangyu [1 ]
Liu, Xiaohong [1 ]
机构：
[1] Qingdao Agr Univ, Coll Chem & Pharmaceut Sci, Laiyang 266109, Shandong, Peoples R China
来源：
MATERIALS LETTERS | 2011年 / 65卷 / 13期
关键词：
Room-temperature solid-state reaction; Cobalt hydroxide; Nanoparticles; Morphological function; Electrical properties; COBALT HYDROXIDE FILMS; ELECTROCHEMICAL CAPACITANCE; ELECTRODE; SUPERCAPACITORS; OXIDE;
D O I：
10.1016/j.matlet.2011.04.022
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Flake-like beta-Co(OH)(2) with dimension around 20-50 nm was conveniently synthesized via a simple, low cost and practical room-temperature solid-state reaction with the assistance of polyethylene glycol (PEG) 400 and its electrochemical properties were evaluated using cyclic voltammetry (CV) and galvanostatic charge-discharge technology. A high specific capacitance of 658.4 F g(-1) at 5 mA was observed for the beta-Co(OH)(2) nanoflakes, compared to 302.7 F g(-1) for the block-like beta-Co(OH)(2) obtained without the PEG-400, showing the morphological function of nanoflakes for improving the capacitive performance. Furthermore, the beta-Co (OH)(2) nanoflakes can offer a good specific capacitance retention of ca. 80% after 1000 cycles, suggesting its potential application in supercapacitors. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：2025 / 2028
页数：4
相关论文
共 18 条
[1]   Preparation of the novel nanocomposite Co(OH)2/ultra-stable Y zeolite and its application as a supercapacitor with high energy density [J].
Cao, L ;
Xu, F ;
Liang, YY ;
Li, HL .
ADVANCED MATERIALS, 2004, 16 (20) :1853-+
[2]   Preparation and gas-sensing properties of pure and Nd-doped ZnO nanorods by low-heating solid-state chemical reaction [J].
Cao, Yali ;
Pan, Weiyu ;
Zong, Ying ;
Jia, Dianzeng .
SENSORS AND ACTUATORS B-CHEMICAL, 2009, 138 (02) :480-484
[3]   MnO2 multilayer nanosheet clusters evolved from monolayer nanosheets and their predominant electrochemical properties [J].
Feng, Zhan-Ping ;
Li, Gao-Ren ;
Zhong, Jin-Hui ;
Wang, Zi-Long ;
Ou, Yan-Nan ;
Tong, Ye-Xiang .
ELECTROCHEMISTRY COMMUNICATIONS, 2009, 11 (03) :706-710
[4]   Synthesis of α-Cobalt Hydroxides with Different Intercalated Anions and Effects of Intercalated Anions on Their Morphology, Basal Plane Spacing, and Capacitive Property [J].
Hu, Zhong-Ai ;
Xie, Yu-Long ;
Wang, Yao-Xian ;
Xie, Li-Jing ;
Fu, Guo-Rui ;
Jin, Xiao-Qing ;
Zhang, Zi-Yu ;
Yang, Yu-Ying ;
Wu, Hong-Ying .
JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (28) :12502-12508
[5]   Synthesis and electrochemical capacitance of sheet-like cobalt hydroxide [J].
Hu, Zhongai ;
Mo, Liping ;
Feng, Xiaojuan ;
Shi, Jun ;
Wang, Yaoxian ;
Me, Yulong .
MATERIALS CHEMISTRY AND PHYSICS, 2009, 114 (01) :53-57
[6]   Large-Scale Uniform α-Co(OH)2 Long Nanowire Arrays Grown on Graphite as Pseudocapacitor Electrodes [J].
Jiang, Jian ;
Liu, Jinping ;
Ding, Ruimin ;
Zhu, Jianhui ;
Li, Yuanyuan ;
Hu, Anzheng ;
Li, Xin ;
Huang, Xintang .
ACS APPLIED MATERIALS & INTERFACES, 2011, 3 (01) :99-103
[7]   Co(OH)2/SBA-15 molecular sieves nanocomposite materials for electrochemical capacitors [J].
Kong, Ling-Bin ;
Cai, Jian-Jun ;
Sun, Lin-Lin ;
Zhang, Jing ;
Luo, Yong-Chun ;
Kang, Long .
MATERIALS CHEMISTRY AND PHYSICS, 2010, 122 (2-3) :368-373
[8]   Facile approach to prepare loose-packed cobalt hydroxide nano-flakes materials for electrochemical capacitors [J].
Kong, Ling-Bin ;
Lang, Jun-Wei ;
Liu, Min ;
Luo, Yong-Chun ;
Kang, Long .
JOURNAL OF POWER SOURCES, 2009, 194 (02) :1194-1201
[9]   Synthesis of Co(OH)2/USY composite and its application for electrochemical supercapacitors [J].
Liang, YY ;
Cao, L ;
Kong, LB ;
Li, HL .
JOURNAL OF POWER SOURCES, 2004, 136 (01) :197-200
[10]   Supercapacitive cobalt oxide (Co3O4) thin films by spray pyrolysis [J].
Shinde, V. R. ;
Mahadik, S. B. ;
Gujar, T. P. ;
Lokhande, C. D. .
APPLIED SURFACE SCIENCE, 2006, 252 (20) :7487-7492
12