Reciprocated suppression of polymer crystallization toward improved solid polymer electrolytes: Higher ion conductivity and tunable mechanical properties |
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| Authors: | Sheng Bi Che‐Nan Sun Thomas A. Zawodzinski Jr. Fei Ren Jong Kahk Keum Suk‐Kyun Ahn Dawen Li Jihua Chen |
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| Affiliation: | 1. Department of Electrical and Computer Engineering Center for Materials Information Technology, University of Alabama, Tuscaloosa, Alabama;2. Materials Science & Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee;3. Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee;4. Department of Mechanical Engineering, Temple University, Philadelphia, Pennsylvania;5. Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee;6. Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee;7. Department of Polymer Science and Engineering, Pusan National University, Busan, Republic of Korea |
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| Abstract: | Solid polymer electrolytes based on lithium bis(trifluoromethanesulfonyl) imide and polymer matrix were extensively studied in the past due to their excellent potential in a broad range of energy related applications. Poly(vinylidene fluoride) (PVDF) and polyethylene oxide (PEO) are among the most examined polymer candidates as solid polymer electrolyte matrix. In this work, we study the effect of reciprocated suppression of polymer crystallization in PVDF/PEO binary matrix on ion transport and mechanical properties of the resultant solid polymer electrolytes. With electron and X‐ray diffractions as well as energy filtered transmission electron microscopy, we identify and examine the appropriate blending composition that is responsible for the diminishment of both PVDF and PEO crystallites. A three‐fold conductivity enhancement is achieved along with a highly tunable elastic modulus ranging from 20 to 200 MPa, which is expected to contribute toward future designs of solid polymer electrolytes with high room‐temperature ion conductivities and mechanical flexibility. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2015 , 53, 1450–1457 |
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| Keywords: | blends crystallization ion conductivity polymer crystallization reciprocated suppression solid polymer electrolytes TEM |
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