Effect of molecular weight on conductivity of polymer electrolytes |
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| Authors: | Alexander A Teran Maureen H Tang Scott A Mullin Nitash P Balsara |
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| Institution: | a Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USAb Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USAc Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA, 94720, USA |
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| Abstract: | The ionic conductivity, σ, of mixtures of poly(ethylene oxide) (PEO) and lithium bis(trifluoromethanesulfone)imide (LiTFSI) was measured as a function of molecular weight of the PEO chains, M, over the range 0.2-5000 kg/mol. Our data are consistent with an expression σ = σ0 + K/M proposed by Shi and Vincent Solid State Ionics 60 (1993)] where σ0 and K are exponential and linear functions of inverse temperature respectively. Explicit expressions for σ0 and K are provided. |
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| Keywords: | Polymer electrolyte Ionic conductivity Molecular weight dependence |
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