Abstract
In this work, a polymer/ceramic phase-separation porous membrane is first prepared from polyvinyl alcohol–polyacrylonitrile water emulsion mixed with fumed nano-SiO2 particles by the phase inversion method. This porous membrane is then wetted by a non-aqueous Li–salt liquid electrolyte to form the polymer/colloid dual-phase electrolyte membrane. Compared to the liquid electrolyte in conventional polyolefin separator, the obtained electrolyte membrane has superior properties in high ionic conductivity (1.9 mS cm−1 at 30 °C), high Li+ transference number (0.41), high electrochemical stability (extended up to 5.0 V versus Li+/Li on stainless steel electrode), and good interfacial stability with lithium metal. The test cell of Li/LiCoO2 with the electrolyte membrane as separator also shows high-rate capability and excellent cycle performance. The polymer/colloid dual-phase electrolyte membrane shows promise for application in rechargeable lithium batteries.
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The authors greatly appreciate Dr. Wu Xu of Ferro Corporation for helpful discussions and Dr. Jeffrey Morgan Lucas of University of Massachusetts Amherst/Department of Chemistry for refining the language.
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Huai, Y., Deng, J., Li, R. et al. Polymer/colloid dual-phase electrolyte membrane for rechargeable lithium batteries. J Solid State Electrochem 17, 209–215 (2013). https://doi.org/10.1007/s10008-012-1877-2
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DOI: https://doi.org/10.1007/s10008-012-1877-2