Large-Scale Uniform α-Co(OH)2 Long Nanowire Arrays Grown on Graphite as Pseudocapacitor Electrodes

被引：162

作者：

Jiang, Jian ^{[1
]}

Liu, Jinping ^{[1
]}

Ding, Ruimin ^{[1
]}

Zhu, Jianhui ^{[1
]}

Li, Yuanyuan ^{[2
]}

Hu, Anzheng ^{[1
]}

Li, Xin ^{[1
]}

Huang, Xintang ^{[1
]}

机构：

[1] Huazhong Normal Univ, Dept Phys, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China

[2] Huazhong Univ Sci & Technol, Dept Elect Sci & Technol, Wuhan 430074, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2011年 / 3卷 / 01期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

alpha-Co(OH)(2); long nanowire arrays; robust adhesion; graphite subrate; supercapacitor; sacrificial template; ELECTROCHEMICAL CAPACITORS; MATERIALS SCIENCE; CARBON NANOTUBES; NANOSTRUCTURES; CONVERSION; SUPERCAPACITOR; SUBSTRATE; FILMS; RUO2;

D O I：

10.1021/am1009887

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Large-scale uniform alpha-Co(OH)(2) nanowire arrays (NWAs) with an average length of similar to 20 mu m grown on pyrolytic graphite (PG) were successfully synthesized by a hydrothermal method at 120 degrees C Ultrasonication test was carried out toward the as made nanoarray products and the result demonstrated their robust adhesion to graphtic substrate. Afte 300,s of sonication testing alpha-Co(OH)(2) NWAs could still possess both integrated one-dimensional (1 D) nanoarray architecture and good electronic connections with current collector. When investigated as electrochemical pseudocapacitor electrodes, alpha-Co(OH)(2) NWAs exhibited good energy-storage performance in terms of high specific capacitance of 642.5 F/g, good rate capability and excellent capacity retention. Our work not only presents a cost-effective and scale-up synthetic-method for alpha-Co(OH)(2) NWAs bu also holds promise in general synthesis of long arrays of other metal hydroxides/oxide (TiO2, Fe2O3,SnO2 etc) nanostructures on PG substrate by using alpha-Co(OH)(2) NWAs as sacrificial templates.

引用

页码：99 / 103

页数：5

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