Ionic conductivity of mesoporous block copolymer membranes in liquid electrolyte as a function of copolymer and homopolymer molecular weight

ORAL

Abstract

Mesoporous block copolymer membranes have been synthesized using poly(styrene-block-ethylene-block-polystyrene) (SES). A series of symmetric SES copolymers and PS homopolymers have been studied at different blending fractions. Ionic conductivities of the porous films in a liquid electrolyte, 1.0 M LiPF$_{6}$ in ethylene carbonate/diethyl carbonate, compare favorably to conventional battery separators and generally increase with internal surface area, as measured by nitrogen adsorption. Characterization of the effects of pore structure and SES morphology on conductivity will be presented.

–

Authors

  • David Wong

    University of California, Berkeley

  • Scott Mullin

    University of California, Berkeley

  • Greg Stone

    University of California at Berkeley, University of California, Berkeley

  • Vincent Battaglia

    Lawrence Berkeley National Labs

  • Nitash Balsara

    UC Berkeley, University of California, Berkeley