Effect of modification by poly(ethylene-oxide) on the reversibility of Li insertion/extraction in MoO3 nanocomposite films

✍ Scribed by Li-Qiang Mai; Wen Chen; Qing Xu; Quan-Yao Zhu

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 169 KB
• Volume: 66
• Category: Article
• ISSN: 0167-9317
• DOI: 10.1016/s0167-9317(03)00047-9

✦ Synopsis

MoO xerogel films modified by poly(ethylene-oxide) (PEO) were obtained by combining ion-exchange 3 method with sol-gel technique. Investigations were conducted by X-ray diffractometry (XRD), Fourier transformation infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry. The results show that when MoO xerogel is modified by the intercalation of PEO, the H atoms in PEO are 3 H-bonded with the O atoms in the Mo=O bonds of MoO xerogel, which effectively shields the electrostatic 3 1 1 interaction between MoO interlayer and Li ions. The reversibility of the insertion / extraction of Li ions is 3 greatly improved by the modification with PEO of MoO nanocomposite films.

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