Facile synthesis of hollow Co3O4 boxes for high capacity supercapacitor

被引：255

作者：

Du, Wei ^{[1
,2
]}

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

Jiang, Yuanwen ^{[1
]}

Lu, Qingyi ^{[1
]}

Fan, Yongzhang ^{[1
,2
]}

Gao, Feng ^{[2
]}

机构：

[1] Nanjing Univ, Sch Chem & Chem Engn, Nanjing Natl Lab Microstruct, Inst Coordinat Chem,State Key Lab Coordinat Chem, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China

[3] Anhui Polytech Univ, Coll Biol & Chem Engn, Wuhu 241000, Anhui, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2013年 / 227卷

基金：

中国国家自然科学基金;

关键词：

Cobalt oxide; Hollow structures; Kirkendall effect; Supercapacitor; COBALT; BATTERIES; AEROGELS; BEHAVIOR;

D O I：

10.1016/j.jpowsour.2012.11.009

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 (1D) cobalt acetate hydroxide (Co-5(OH)(2)(CH3COO)(8)center dot 2H(2)O) prisms has been obtained through a low temperature re-crystallization process in the dissolvant of ethanol and then transferred to cobalt oxide by calcining in the air. Cobalt oxide keeps the outside configuration of the 1D cobalt acetate hydroxide but turns to be boxes with hollow structure inside through the Kirkendall effect The precursor prisms and polycrystalline boxes both have length of about 3 mu m, width of 300 nm and height of 300 nm characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The electrochemical measurement results show that the hollow Co3O4 structures exhibit wonderful capacitive properties with high capacitance and good cyclicity. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：101 / 105

页数：5

共 23 条

[1] Building better batteries [J].