Improvement of the electrochemical performance of nanosized α-MnO2 used as cathode material for Li-batteries by Sn-doping

被引：93

作者：

Hashem, A. M. ^{[1
]}

Abdel-Latif, A. M. ^{[1
]}

Abuzeid, H. M. ^{[1
]}

Abbas, H. M. ^{[2
]}

Ehrenberg, H. ^{[3
,4
]}

Farag, R. S. ^{[5
]}

Mauger, A. ^{[6
]}

Julien, C. M.

机构：

[1] Natl Res Ctr, Dept Inorgan Chem, Cairo, Egypt

[2] Natl Res Ctr, Dept Phys Chem, Cairo, Egypt

[3] IFW Dresden, Inst Complex Mat, D-01069 Dresden, Germany

[4] Tech Univ Darmstadt, D-64287 Darmstadt, Germany

[5] Al Azhar Univ, Fac Sci, Dept Chem, Cairo, Egypt

[6] Univ Paris 06, IMPMC, F-75005 Paris, France

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 40期

关键词：

Lithium ion batteries; Manganese dioxide; Tin doping; Cryptomelane; MANGANESE OXIDES; NANOWIRES; MNO2; MORPHOLOGY;

D O I：

10.1016/j.jallcom.2011.07.075

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Sn-doped MnO2 was prepared by hydrothermal reaction between KMnO4 as oxidant, fumaric acid C4H4O4 as reductant and SnCl2 as doping agent. XRD analysis indicates the cryptomelane alpha-MnO2 crystal structure for pure and doped samples. Thermal stabilization was observed for both oxides as detected from thermogravimetric analysis. SEM and TEM images show changes in the morphology of the materials from spherical-like particles for pristine P-MnO2 to rod-like structure for Sn-MnO2. Electrochemical properties of the electrode materials have been tested in lithium cells. Improvement in capacity retention and cycling ability is observed for doped oxide at the expense of initial capacity. After 35 cycles, the Li//Sn doped MnO2 cell display lower capacity loss. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：9669 / 9674

页数：6

共 28 条

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Nanosized silver-coated and doped manganese dioxide for rechargeable lithium batteries [J].