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High ionic conductive PVDF-based fibrous electrolytes

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Abstract

The high ionic conductive polymer electrolytes were prepared based on poly(vinylidenefluoride) (PVDF) fibers modified via preirradiation grafting poly(methyl methacrylate) (PMMA). In these polymer electrolytes, the PVDF fibers served as the supporting phase providing dimensional stability, and PMMA acted as the gel phase helping for the trapping liquid electrolyte and substituting the nonconductive PVDF phase to provide contact with electrodes well thus increasing conductive area. The modified PVDF fibrous membranes were used as a polymer electrolyte in lithium ion battery after they were activated by uptaking 1 M LiPF6/ethylene carbonate–dimethyl carbonate (1:1 vol) liquid electrolyte, which showed a much higher room-temperature ionic conductivity than the pristine PVDF fibrous membrane. The LiCoO2-mesocarbon microbead coin cells containing the dual-phase fibrous membrane (degree of graft, 111.8%) demonstrated excellent rate performance, and the cell still retained about 86% of discharge capacity at 4C rate, as compared to that at 0.1C rate. The prototype cell showed good cycle performance.

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Authors and Affiliations

  1. School of Chemistry and Chemical Technology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People’s Republic of China

    Zhiming Li, Feng Shan, Jiangong Wei, Jun Yang & Xinling Wang

  2. School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, People’s Republic of China

    Xinsong Li

Authors
  1. Zhiming Li
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  2. Feng Shan
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  3. Jiangong Wei
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  4. Jun Yang
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  5. Xinsong Li
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  6. Xinling Wang
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Correspondence to Xinling Wang.

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Li, Z., Shan, F., Wei, J. et al. High ionic conductive PVDF-based fibrous electrolytes. J Solid State Electrochem 12, 1629–1635 (2008). https://doi.org/10.1007/s10008-008-0540-4

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  • DOI: https://doi.org/10.1007/s10008-008-0540-4

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