Effect of thermal history on the ionic conductivity of block copolymer electrolytes |
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| Authors: | Scott A Mullin Alexander A Teran Rodger Yuan Nitash P Balsara |
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| Institution: | 1. Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, , Berkeley, California, 94720;2. Department of Chemical and Biomolecular Engineering, University of California, , Berkeley, California, 94720;3. Department of Material Science and Engineering, University of California, , Berkeley, California, 94720;4. Materials Sciences Division, Lawrence Berkeley National Laboratory, , Berkeley, California, 94720 |
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| Abstract: | We have studied the effect of thermal history on ionic conductivity of block copolymer electrolytes. Previous work on block copolymer electrolytes composed of polystyrene‐b‐poly(ethylene oxide) (SEO) and lithium bis(trifluoromethanesulfone) imide (LiTFSI) salt was restricted to lamellar morphologies. This study addresses both cylindrical and lamellar morphologies. The conductivity of low molecular weight samples decreases after they are annealed. In contrast, the conductivity of high molecular weight samples is generally unaffected by annealing. These results are explained in the context of connectivity and composition of the conducting phase. © 2013 Wiley Periodicals, Inc. J. Polym. Sci. Part B: Polym. Phys. 2013 , 51, 927–934 |
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| Keywords: | annealing block copolymer ionic conductivity polystyrene‐block‐poly(ethylene oxide) polymer electrolyte self‐assembly |
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