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Synthesis and Electrochemical Properties of V2O5 Intercalated with Binary Polymers
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- Authors
- Nam-Gyu Park, Kwang Sun Ryu, Yong Joon Park, Man Gu Kang, Dong-Kuk Kim, Seong-Gu Kang, Kwang Man Kim, Soon-Ho Chang
- Issue Date
- 2002-01
- Citation
- Journal of Power Sources, v.103, no.2, pp.273-279
- Language
- English
- Type
- Journal Article
- Abstract
- We have synthesized a new inorganic/organic hybrid material, which comprises vanadium pentoxide (V2O5) and the binary polymers poly(2,5-dimercapto-1,3,4-thiadiazole) (PDMcT) and polyaniline (PANI), and have investigated its electrochemical property. Fourier transform infrared spectra (FT-IR) confirms that both 2,5-dimercapto-1,3,4-thiadiazole (DMcT) and aniline molecules are oxidatively intercalated into the interlayer of V2O5 xerogel, and result in a binary polymers/V2O5 hybrid material. X-ray diffraction (XRD) shows that intercalation of polymers expands the V2O5 interlayer distance by 4.8횇. V K-edge X-ray absorption near-edge structure spectroscopic analysis shows no significant change in VO6 octahedral symmetry, but a slight reduction of the V(5+) state. Electrochemical investigations in the 4-2V range versus Li/Li+ using non-aqueous electrolyte cells show that as-synthesized binary polymers/V2O5 material exhibits an initial discharge capacity of ~190mAhg-1 while an oxygen-treated sample exhibits an initial capacity of about 220mAhg-1 and a better reversibility for lithium insertion/de-insertion. © 2002 Elsevier Science B.V. All rights reserved.
- KSP Keywords
- 4-Thiadiazole, 5-dimercapto-1, As-synthesized, Fourier Transform Infrared Spectroscopy(FTIR), Fourier transform infrared spectra, K-edge, Non-aqueous electrolyte, Octahedral symmetry, Spectroscopic Analysis, X-ray absorption near-edge structure, X-ray diffraction (xrd)