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Enhanced ionic conductivity of poly(ethylene oxide) (PEO) electrolyte by adding mesoporous molecular sieve LiAlSBA

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Abstract

Mesoporous molecular sieve LiAlSBA was prepared via an ion exchange process with mesoporous AlSBA directly, which has a regular 2D hexagonal structure with pore size about 7 nm. It was added into poly(ethylene oxide) (PEO) solid electrolyte as filler. The characteristics of the composite polymer electrolyte were determined by XRD, DSC, TGA, FTIR, PLM and electrochemical methods. Compared with bare PEO electrolyte, the adding of dispersed LiAlSBA powder improved the ionic conductivity of PEO polymer electrolyte more than three orders. The reason for it is that mesoporous LiAlSBA powder acts as crystal cores in PEO composite electrolyte and fines the crystallites, decreases the crystallinity, which provides much more continuous amorphous domain for Li+ moving easily in PEO electrolyte. Besides, lithium ions of the mesoporous molecular sieves can hop from one site to another along the surface of the mesoporous channels, this mechanism is absent in the case of common nano-ceramic fillers in PEO electrolyte.

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Acknowledgements

This work was supported by National Science Foundation of China.

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Authors and Affiliations

  1. Department of Chemistry, and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200433, P.R. China

    Xueli Li, Yi Zhao, Liang Cheng, Manming Yan, Xuezheng Zheng, Zi Gao & Zhiyu Jiang

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  1. Xueli Li
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  2. Yi Zhao
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  3. Liang Cheng
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  4. Manming Yan
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  5. Xuezheng Zheng
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  6. Zi Gao
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  7. Zhiyu Jiang
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Correspondence to Zhiyu Jiang.

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Li, X., Zhao, Y., Cheng, L. et al. Enhanced ionic conductivity of poly(ethylene oxide) (PEO) electrolyte by adding mesoporous molecular sieve LiAlSBA. J Solid State Electrochem 9, 609–615 (2005). https://doi.org/10.1007/s10008-004-0613-y

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  • DOI: https://doi.org/10.1007/s10008-004-0613-y

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