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Simultaneous Electronic and Ionic Conduction in a Block Copolymer: Application in Lithium Battery Electrodes

Authors

  • Dr. Anna E. Javier,

    1. Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA 94720 (USA)
    2. Department of Chemical Engineering, University of California at Berkeley, Berkeley, CA 94720 (USA)
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  • Shrayesh N. Patel,

    1. Department of Chemical Engineering, University of California at Berkeley, Berkeley, CA 94720 (USA)
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  • Dr. Daniel T. Hallinan Jr.,

    1. Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA 94720 (USA)
    2. Department of Chemical Engineering, University of California at Berkeley, Berkeley, CA 94720 (USA)
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  • Dr. Venkat Srinivasan,

    1. Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA 94720 (USA)
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  • Prof. Nitash P. Balsara

    Corresponding author
    1. Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA 94720 (USA)
    2. Department of Chemical Engineering, University of California at Berkeley, Berkeley, CA 94720 (USA)
    • Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA 94720 (USA)
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  • This work was supported by U.S. DOE contract no. DE-AC02-05CH11231 BATT Program (A.E.J., D.T.H., V.S., N.P.B.), and through the LBNL LDRD Program (S.N.P., 2007–2010). S.N.P. thanks NSF (CBET 0966632). SAXS experiments were performed at the Advanced Light Source, LBNL, a DOE national user facility supported by the DOE under the same contract. We also wish to thank Profs. R.A. Segalman and M. Jeffries-EL, and Drs. H. Gao and T. Constantin for helpful discussions.

Abstract

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Charging ahead: Separate values for the simultaneous electronic and ionic conductivity of a conjugated polymer containing poly(3-hexylthiophene) and poly(ethylene oxide) (P3HT-PEO) were determined by using ac impedance and dc techniques. P3HT-PEO was used as binder, and transporter of electronic charge and Li+ ions in a LiFePO4 cathode, which was incorporated into solid-state lithium batteries (see picture; TFSI=bis(trifluoromethane sulfone)imide).

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