Ionic Conductivity of Poly(ethylene oxide)-Containing Block Copolymers at Order-Disorder and Order-Order Transitions

ORAL

Abstract

The order-disorder transition (ODT) and order-order transition (OOT) of block copolymers with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salts are measured with a combination of small-angle x-ray scattering (SAXS) and birefringence. The block copolymers comprise of polyethylene oxide (PEO), a polymer with a higher dielectric constant that dissolves LiTFSI, and polystyrene (PS), a polymer with a lower dielectric constant that does not dissolve LiTFSI. Ionic conductivity of the block copolymers are measured through the observed ODT and OOT. The effect of morphology on the ionic conductivity will be presented and compared with literature results.

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Authors

  • Nisita Wanakule

    UC Berkeley

  • Ashoutosh Panday

    UC Berkeley, Lawrence Berkeley National Labs, Lawrence Berkeley Lab, Berkeley,CA, UC Berkeley

  • Scott Mullin

    UC Berkeley, Lawrence Berkeley National Labs, UC Berkeley

  • Nitash Balsara

    UC Berkeley, Lawrence Berkeley National Labs, University of California, Berkeley, CA, UC Berkeley