Solution processing of V2O5-WO3 composite films for enhanced Li-ion intercalation properties

被引:20
作者
Cai, Chuan [1 ]
Guan, Dongsheng [1 ]
Wang, Ying [1 ]
机构
[1] Louisiana State Univ, Dept Mech Engn, Baton Rouge, LA 70803 USA
关键词
Composite materials; Energy storage materials; Scanning electron microscopy; X-ray diffraction; TUNGSTEN-OXIDE FILMS; LASER ABLATION TECHNIQUE; SOL-GEL; ELECTROCHEMICAL PROPERTIES; ELECTROCHROMIC PROPERTIES; VANADIUM PENTOXIDE; THIN-FILMS; CATHODE MATERIALS; DOPED V2O5; HYDROTHERMAL SYNTHESIS;
D O I
10.1016/j.jallcom.2010.09.129
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
We have employed a simple and novel solution processing method to prepare V2O5-WO3 composite films which demonstrate enhanced Li-ion intercalation properties for applications in lithium-ion batteries or electrochromic displays. This solution processing method employs precursors that only contain the elements of V, W, O and H, which avoids impurity elements such as Na that has been commonly used in other solution methods (e.g. using precursors of sodium metavanadate and sodium tungstate solution). The V2O5-WO3 composite films show enhanced Li-ion intercalation properties compared to pure V2O5 and WO3 films. For example, at a high current density of 1.33 A/g, V2O5-WO3 film with a V2O5/WO3 molar ratio of 10/1 exhibits the highest capacities of 200 mA h/g at the first cycle and 132 mA h/g after 50 cycles, while pure V2O5 film delivers discharge capacities of 108 mA h/g at the first cycle and 122 mA h/g after 50 cycles. The enhanced Li-ion intercalation properties of the composite films are ascribed to the reduced crystallinity, the increased porosity and thus the enhanced surface area. Both the cyclic voltammogram and chronopotentiometric curves of the V2O5-WO3 film with a molar ratio of 10:1 are distinctively different from those of pure oxide films, suggesting a different Li-ion intercalation process in the V2O5-WO3 film with the molar ratio of 10:1. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:909 / 915
页数:7
相关论文
共 54 条
[1]   Polyethylene oxide electrolyte membranes with pyrrolidinium-based ionic liquids [J].
Abitelli, E. ;
Ferrari, S. ;
Quartarone, E. ;
Mustarelli, P. ;
Magistris, A. ;
Fagnoni, M. ;
Albini, A. ;
Gerbaldi, C. .
ELECTROCHIMICA ACTA, 2010, 55 (19) :5478-5484
[2]   Preparation of silica microspheres coated with V2O5 xerogel and V2O5/WO3 composite xerogel via adapted Stober process [J].
Barbosa, Glauciane N. ;
Bolsoni, Aline T. ;
Oliveira, Herenilton P. .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2008, 354 (30) :3548-3553
[3]   Doped vanadium oxides as host materials for lithium intercalation [J].
Coustier, F ;
Hill, J ;
Owens, BB ;
Passerini, S ;
Smyrl, WH .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1999, 146 (04) :1355-1360
[4]   Dip-coated silver-doped V2O5 xerogels as host materials for lithium intercalation [J].
Coustier, F ;
Passerini, S ;
Smyrl, WH .
SOLID STATE IONICS, 1997, 100 (3-4) :247-258
[5]   Opportunities and challenges in science and technology of WO3 for electrochromic and related applications [J].
Deb, Satyen K. .
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2008, 92 (02) :245-258
[6]   A comparison of electrochromic properties of sol-gel derived amorphous and nanocrystalline tungsten oxide films [J].
Deepa, M. ;
Singh, D. P. ;
Shivaprasad, S. M. ;
Agnihotry, S. A. .
CURRENT APPLIED PHYSICS, 2007, 7 (02) :220-229
[7]   IR-SPECTRAL STUDY OF VANADATE VITREOUS SYSTEMS [J].
DIMITRIEV, Y ;
DIMITROV, V ;
ARNAUDOV, M ;
TOPALOV, D .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 1983, 57 (01) :147-156
[8]  
Fang GJ, 2001, THIN SOLID FILMS, V394, P64
[9]   Orientated growth of V2O5 electrochromic thin films on transparent conductive glass by pulsed excimer laser ablation technique [J].
Fang, GJ ;
Liu, ZL ;
Wang, YQ ;
Liu, HH ;
Yao, KL .
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2000, 33 (23) :3018-3021
[10]   Synthesis and electrochemical characterization of vanadium oxide/carbon nanotube composites for supercapacitors [J].
Fang, Wei-Chuan .
JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (30) :11552-11555