Facile synthesis and electrochemical characterization of hierarchical α-MnO2 spheres

被引：35

作者：

Wang, Hong-En ^{[1
,2
]}

Lu, Zhouguang ^{[2
]}

Qian, Dong ^{[2
]}

Fang, Shunping ^{[2
]}

Zhang, Jianfeng ^{[2
]}

机构：

[1] Zhengzhou Res Inst Light Met, Zhengzhou Res Inst CHALCO, Zhengzhou 450041, Peoples R China

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

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 466卷 / 1-2期

关键词：

Oxide materials; Chemical synthesis; Crystal growth; Electrode materials;

D O I：

10.1016/j.jallcom.2007.11.041

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：

Hierarchical alpha-MnO2 spheres have been synthesized by a facile wet chemical method involving no templates. The products were characterized by XRD, SEM, EDX, and TEM. It was found that the products are composed of a large quantity of submicron-spheres with diameters of 300-500 nm and a few microspheres with diameters of several micrometers. The MnO2 submicron-spheres were constructed of many small nanorods with diameters of ca. 10 nm and lengths up to 50 nm. The influences of experimental parameters on the morphology and phase of the products were investigated. The possible formation mechanism for the hierarchical alpha-MnO2 spheres was discussed based on the experimental results. Electrochemical properties of the as-synthesized MnO2 spheres as cathode materials in Li-ion cells were also studied and compared. (c) 2007 Elsevier B. V. All rights reserved.

引用

页码：250 / 257

页数：8

共 32 条

[1] SOL-GEL SYNTHESIS OF MANGANESE OXIDES [J].

BACH, S ;

HENRY, M ;

BAFFIER, N ;

LIVAGE, J .

JOURNAL OF SOLID STATE CHEMISTRY, 1990, 88 (02) :325-333

[2] Hydrothermal synthesis and characterization of K chi MnO2 center dot gamma H2O [J].

Chen, RJ ;

Zavalij, P ;

Whittingham, MS .

CHEMISTRY OF MATERIALS, 1996, 8 (06) :1275-1280

[3] Synthesis and characterization of inorganic double helices of cryptomelane nanomaterials [J].

Cheney, Marcos A. ;

Birkner, Nancy R. ;

Ma, Longzhou ;

Hartmann, Thomas ;

Bhowmik, Pradip K. ;

Hodge, Vernon F. ;

Steinberg, Spencer M. .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2006, 289 (1-3) :185-192

[4] 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

[5] 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

[6] Synthesis of hierarchically mesoporous anatase spheres and their application in lithium batteries [J].

Guo, Yu-Guo ;

Hu, Yong-Sheng ;

Maier, Joachim .

CHEMICAL COMMUNICATIONS, 2006, (26) :2783-2785

[7] Synthesis and optical properties of rutile TiO2 microspheres composed of radially aligned nanorods [J].

Han, Yi ;

Li, Guicun ;

Zhang, Zhikun .

JOURNAL OF CRYSTAL GROWTH, 2006, 295 (01) :50-53

[8] MnO2 (α-, β-, γ-) compounds prepared by hydrothermal-electrochemical synthesis:: characterization, morphology, and lithium insertion behavior [J].

Hill, LI ;

Verbaere, A ;

Guyomard, D .

JOURNAL OF POWER SOURCES, 2003, 119 :226-231

[9]

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

[10] Preparation of layered MnO2 via thermal decomposition of KMnO4 and its electrochemical characterizations [J].

Kim, SH ;

Kim, SJ ;

Oh, SM .

CHEMISTRY OF MATERIALS, 1999, 11 (03) :557-563

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