Structure-function Properties of Microphase Separated Ion Conducting Block Copolymer Thin Films

ORAL

Abstract

In this talk, we will discuss the role of the ion conduction path on the electrochemical behavior of ion conducting block copolymer (BCP) thin films. A BCP thin film with one ion conducting block (poly(2-vinyl n-methylpyridinium iodide)) and one ion insulating block (polystyrene) was micro-phase separated into a variety of conduction paths on top of interdigitated electrodes (IDEs). A random copolymer was grafted onto the IDE surface to align the domains perpendicular to the surface. Therefore, simple top down surface metrology techniques could be used to characterize all of the ion conduction pathways from one electrode to the other. The conductivity and capacitance values, calculated from complex impedance spectra, changed by orders of magnitude when the morphology of the BCP film was altered. Additionally, visual analysis of the conduction paths along with molecular dynamic simulations were used to predict the measured resistance of the film within experimental error.

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Presenters

  • Yu Kambe

    University of Chicago

Authors

  • Yu Kambe

    University of Chicago

  • Christopher Arges

    Chemical Engineering, Louisiana State University

  • Yamil Colon

    University of Chicago

  • Weiwei Chu

    University of Chicago

  • Juan De Pablo

    Institute for Molecular Engineering, The University of Chicago, Institute for Molecular Engineering, Univ of Chicago, Institute for molecular engineering, The University of Chicago, University of Chicago, Univ of Chicago, Institute for Molecular Engineering, University of Chicago, The Institute for Molecular Engineering, The University of Chicago, Institute of Molecular Engineering, University of Chicago

  • Paul Nealey

    University of Chicago, Univ of Chicago, Institute for Molecular Engineering, The University of Chicago, University of Chicago and Argonne National Laboratory, Institute for Molecular Engineering, University of Chicago