Electrochemical Characterization of Vanadium Oxide Nanostructured Electrode

Elsa A. Olivetti, Kenneth C. Avery, Ikuo Taniguchi, Donald R. Sadoway, Anne M. Mayes
2008 Journal of the Electrochemical Society  
Films consisting of a vanadium pentoxide ͑i.e., V 2 O 5 ͒ phase formed within a rubbery block copolymer were developed for their potential use as nanocomposite cathodes in lithium rechargeable batteries. Films were prepared by sol-gel synthesis from vanadyl triisopropoxide precursor in poly͑oligooxyethylene methacrylate͒-block-poly͑butyl methacrylate͒, incorporating LiCF 3 SO 3 and carbon black as conductivity additives. The morphology of the films was examined using electron microscopy, and
more » ... ir electrochemical performance was assessed by galvanostatic cycling. An all-solid-state battery comprising a polymer-based cathode and a block copolymer electrolyte was cycled repeatedly. The capacity was measured to be 40 mAh/g and found to be limited by the conductivity of the polymer electrolyte. A comparison between a nanocomposite cathode and a control cathode with the same carbon:vanadium oxide ratio demonstrated higher rate capability for the nanocomposite sample when paired with a liquid electrolyte. This study demonstrates the potential utility of block copolymers in the fabrication of high-surface-area cathodes for lithium batteries.
doi:10.1149/1.2909560 fatcat:qlitbew7bncn7nni3zt2s7vfw4