Single-crystal α-MnO2 nanorods:: synthesis and electrochemical properties

被引：207

作者：

Wang, Hongen ^{[1
]}

Lu, Zhouguang

Qian, Dong

Li, Yujie

Zhang, Wei

机构：

[1] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China

[2] State Key Lab Powder Met, Changsha 410083, Peoples R China

来源：

NANOTECHNOLOGY | 2007年 / 18卷 / 11期

关键词：

D O I：

10.1088/0957-4484/18/11/115616

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Single-crystal alpha-MnO2 nanorods were prepared by hydrothermal reaction of single KMnO4 under acidic conditions. The nanorods have a diameter of 30-70 nm and a length up to 2 mu m. The formation mechanism for the alpha-MnO2 nanorods was investigated. Electrochemical properties of the MnO2 nanomaterials prepared for different hydrothermal times were characterized by galvanostatic charge/discharge tests and cyclic voltammetry ( CV) studies. The results indicate that the MnO2 nanorods prepared for 5 and 8 h show fine capacitive behaviour with high specific capacitances of 71.1 and 70.9 F g(-1), respectively.

引用

页数：5

共 23 条

[1] Surface properties of sol-gel synthesized δ-MnO2 as assessed by N2 sorptometry, electron microscopy, and X-ray photoelectron spectroscopy [J].

AL-Sagheer, FA ;

Zaki, MI .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2000, 173 (1-3) :193-204

[2] Facile controlled synthesis of MnO2 nanostructures of novel shapes and their application in batteries [J].

Cheng, FY ;

Zhao, JZ ;

Song, W ;

Li, CS ;

Ma, H ;

Chen, J ;

Shen, PW .

INORGANIC CHEMISTRY, 2006, 45 (05) :2038-2044

[3] High-power alkaline Zn-MuO2 batteries using γ-MnO2 nanowires/nanotubes and electrolytic zinc powder [J].

Cheng, FY ;

Chen, J ;

Gou, XL ;

Shen, PW .

ADVANCED MATERIALS, 2005, 17 (22) :2753-+

[4] Synthesis and catalytic activity of cryptomelane-type manganese dioxide nanomaterials produced by a novel solvent-free method [J].

Ding, YS ;

Shen, XF ;

Sithambaram, S ;

Gomez, S ;

Kumar, R ;

Crisostomo, VMB ;

Suib, SL ;

Aindow, M .

CHEMISTRY OF MATERIALS, 2005, 17 (21) :5382-5389

[5]

Horn Y.S., 1998, J ELECTROCHEM SOC, V145, P582

[6] Supercapacitor behavior with KCl electrolyte [J].

Lee, HY ;

Goodenough, JB .

JOURNAL OF SOLID STATE CHEMISTRY, 1999, 144 (01) :220-223

[7] Synthesis, characterization and magnetic properties of β-MnO2 nanorods [J].

Liu, XM ;

Fu, SY ;

Huang, CJ .

POWDER TECHNOLOGY, 2005, 154 (2-3) :120-124

[8] Preparation of nanowires of M substituted manganese dioxides (M=Al, Co, Ni) by the electrochemical-hydrothermal method [J].

Machefaux, E. ;

Verbaere, A. ;

Guyomard, D. .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2006, 67 (5-6) :1315-1319

[9] Novel electrode materials for thin-film ultracapacitors: Comparison of electrochemical properties of sol-gel-derived and electrodeposited manganese dioxide [J].

Pang, SC ;

Anderson, MA ;

Chapman, TW .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2000, 147 (02) :444-450

[10] Synthesis and electrochemical characterization of amorphous MnO2 electrochemical capacitor electrode material [J].

Reddy, RN ;

Reddy, RG .

JOURNAL OF POWER SOURCES, 2004, 132 (1-2) :315-320

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