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DOE OSTI · 1761672

In situ polymerized succinonitrile-based solid polymer electrolytes for lithium ion batteries

Liu, Kai·Zhang, Qingqing·Thapa, Bishnu·Sun, Xiao-Guang·Ding, Fei·Liu, Xingjiang·Zhang, Jinli·Dai, Sheng
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Abstract

Novel solid polymer electrolytes based on succinonitrile (SN) plastic crystal electrolyte (SN-PCE) and polymerized ionic liquid (PIL) has been successfully synthesized via an in-situ method. The fabricated electrolyte (PIL-SN-PCE) is uniformly inlayed into the supporting matrix of polyimide, which effectively ameliorates the mechanical properties of the electrolyte. PIL can effectively enhance the thermal stability of electrolytes up to 300 °C and mitigate the parasitic reactions between the electrolytes and the electrodes. PIL-SN-PCE exhibits a remarkable oxidation ability up to 5.4 V vs Li/Li + and a high room temperature ionic conductivity of 6.54 × 10 -4 S cm -1 . Furthermore, in-situ formed interface in PIL-SN-PCE guarantee an excellent compatibility with different electrodes, which can effectively improve the cycle stability and rate performances of both half-cells and full cells. Finally, PIL-SN-PCE is considered as a promising electrolyte for high energy density lithium-ion batteries.

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25 ENERGY STORAGEin-situ methodlithium-ion batteriespolymerized ionic liquidsuccinonitrile

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Liu, Kai, Zhang, Qingqing, Thapa, Bishnu, Sun, Xiao-Guang, Ding, Fei, Liu, Xingjiang, Zhang, Jinli, Dai, Sheng. 2019-12-17. In situ polymerized succinonitrile-based solid polymer electrolytes for lithium ion batteries. https://doi.org/10.1016/j.ssi.2019.115159

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