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Ag–Ag 0.08 V 2 O 5 · n H 2 O composite films as host materials for Li + intercalation
Author(s) -
Wang Ying,
Lee Kyoungho,
Shang Huamei,
Wiley Benjamin,
Xia Younan,
Cao Guozhong
Publication year - 2005
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200510026
Subject(s) - intercalation (chemistry) , crystallinity , materials science , electrochemistry , microstructure , electrical resistivity and conductivity , crystallography , metal , composite number , nanowire , nuclear chemistry , analytical chemistry (journal) , nanotechnology , inorganic chemistry , chemistry , electrode , metallurgy , composite material , physics , quantum mechanics , chromatography
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)