期刊
JOURNAL OF POWER SOURCES
卷 406, 期 -, 页码 176-184出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2018.10.050
关键词
Ionanofluid electrolytes; Lithium metal batteries; High lithium salt concentration; Ionic conductivity; Capacitance retentivity; Safety
资金
- DST-SERB (Govt. of India) [EMR/2014/000290]
Incorporation of ionic liquid functionalized TiO2 nanoparticles in low conducting, 0.6 M lithium salt doped N- methyl-N-butylpyrrolidinium bis(trifluoromethylsulfonyl)limide (Pyr(14)TFSI) 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 degrees C at a current density of 24 mAg(-1), much higher than that obtained in conventional 0.2 M Li salt dissociated Pyr(14)TFSI 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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