Electrochemical properties of nanofibers α-MoO3 as cathode materials for Li batteries

被引：69
|
作者：
Hashem, A. M. [2 ,3 ]
Groult, H. [2 ]
Mauger, A. [4 ]
Zaghib, K. [1 ]
Julien, C. M. [2 ]
机构：
[1] Inst Rech Hydroquebec, Varennes, PQ J3X 1S1, Canada
[2] Univ Paris 06, UMR 7195, F-75005 Paris, France
[3] Natl Res Ctr, Dept Inorgan Chem, Cairo, Egypt
[4] Univ Paris 06, IMPMC, F-75005 Paris, France
来源：
JOURNAL OF POWER SOURCES | 2012年 / 219卷
关键词：
Nanomaterials; Molybdenum trioxide; Cathodes; Lithium batteries; Raman spectroscopy; LITHIUM INSERTION; 2-PHASE REACTION; MOLYBDENUM; NANOBELTS; PARTICLES; OXIDES;
D O I：
10.1016/j.jpowsour.2012.06.093
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：
MoO3 nanofibers have been synthesized by hydrothermal reaction from acidified ammonium heptamolybdate tetrahydrate precursor. Characterization included X-ray diffraction (XRD), scanning electron microscopy (SEM), SQUID magnetometry and Raman scattering (RS) spectroscopy. Structural analysis shows that MoO3 nanofibers 50-80 nm in diameter and a several micrometers in length are grown in the orthorhombic system (Pbnm S.G.). The composition MoO2.9975 was determined by Rietveld refinement and magnetic susceptibility measurements. The electrochemical performance of Li//MoO3 cells with nanofibers deliver a better discharge capacity after 40 cycles than MoO3 bulk. Raman spectroscopy studies revealed the structural modulation upon Li intercalation in MoO3 nanofibers. The possible mechanism of intercalation is discussed. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：126 / 132
页数：7
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