Quasi-solid state electrolyte and all solid state lithium secondary battery using same
AssigneesHitachi, Ltd., Tohoku University
InventorsErina Yokoyama, Jun Kawaji, Yoshiyuki Ganbe, Nobuto Oka, Itaru Honma
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Abstract
It is an objective of the invention to provide a quasi-solid state electrolyte that has a well-balanced combination of contact performance with electrode active materials, conductivity, and chemical and structural stability, each at a high level, and an all solid state lithium secondary battery using the quasi-solid state electrolyte. There is provided a quasi-solid state electrolyte comprising: metal oxide particles; and an ionic conductor, the ionic conductor being a mixture of either a glyme or DEME-TFSI and a lithium salt that includes LiFSI, and being carried by the metal oxide particles.
Claims10
A quasi-solid state electrolyte comprising:
- metal oxide particles;
- and
- an ionic conductor, the ionic conductor being a mixture of an organic solvent that consists of at least one of tetraglyme, pentaglyme, hexaglyme and N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium bis(trifluoromethylsulfonyl)imide and lithium bis(fluorosulfonyl)imide (LiFSI) and being carried by the metal oxide particles,
- wherein a molar mixing ratio of the lithium bis(trifluoromethylsulfonyl)imide to the organic solvent (organic solvent (mol)/(LiFSI) lithium salt (mol)) is 1 or higher and 10 or lower.
Dependencies are inferred from the claim text.