Abstract
Films consisting of a vanadium pentoxide (i.e., ) 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 poly(oligooxyethylene methacrylate)-block-poly(butyl methacrylate), incorporating and carbon black as conductivity additives. The morphology of the films was examined using electron microscopy, and their 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 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.
Published Version
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