Add time:07/18/2019         Source:sciencedirect.com

Incorporation of ionic liquid functionalized TiO2 nanoparticles in low conducting, 0.6 M lithium salt doped N-methyl-N-butylpyrrolidinium bis(trifluoromethylsulfonyl)imide (Pyr14TFSI) ionic liquid electrolyte is found to not only suppress crystallinity but also significantly improve both ionic conductivity and lithium transference number in the electrolyte. The Li/LiMn2O4 cell with the best conducting ionanofluid electrolyte delivers a discharge capacity of about 131 mAh g−1 at 25 °C at a current density of 24 mAg−1, much higher than that obtained in conventional 0.2 M Li salt dissociated Pyr14TFSI electrolyte (87 mAh g−1). Excellent rate performance with outstanding capacity retention of the cell as compared to the conventional one indicate superior electrode-electrolyte interfacial compatibility, which further establishes great application potentiality of this optimized newly developed electrolyte for safer lithium metal batteries.

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