Ag-Ag0.08V2O5·nH2O composite films as host materials for Li+intercalation

✍ Scribed by Wang, Ying ;Lee, Kyoungho ;Shang, Huamei ;Wiley, Benjamin ;Xia, Younan ;Cao, Guozhong

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 141 KB
• Volume: 202
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200510026

✦ Synopsis

Abstract

We have prepared Ag–Ag~0.08~V~2~O~5~·__n__H~2~O composite films by dispersing Ag nanowires into V~2~O~5~·__n__H~2~O sol and have investigated electrochemical properties of the films for Li^+^‐ion intercalation applications. With the molar ratio of Ag nanowires to V~2~O~5~·__n__H~2~O as 0.1, such prepared films are composed of metallic Ag nanowires embedded in the matrix of Ag~0.08~V~2~O~5~·__n__H~2~O, due to partial Ag reacted with V~2~O~5~·__n__H~2~O. At a current density of 85 mA/g, such Ag–Ag~0.08~V~2~O~5~·__n__H~2~O film can intercalate about two equivalents of Li ions and delivers twice the capacity of the V~2~O~5~·__n__H~2~O xerogel film. Such improved electrochemical performance is ascribed to the changes in the microstructure and crystallinity of the Ag–Ag~0.08~V~2~O~5~·__n__H~2~O films including (i) further amorphization of V~2~O~5~·__n__H~2~O, (ii) increased porosity, and (iii) enhancement of electrical conductivity. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)