Non-aqueous electrolytic solution for lithium secondary battery or lithium ion capacitor, and lithium secondary battery or lithium ion capacitor using the same
摘要
說明書
The non-aqueous electrolytic solution according to a first aspect of the present invention is a non-aqueous electrolytic solution for a lithium secondary battery or a lithium ion capacitor, including a lithium salt as dissolved in a non-aqueous solvent in a concentration of 0.8 to 1.5 M (mol/L), wherein
the non-aqueous solvent includes, in relation to the whole of the non-aqueous solvent, 5 to 25% by volume of ethylene carbonate, 5 to 25% by volume of propylene carbonate, 20 to 30% by volume of dimethyl carbonate, 10 to 20% by volume of a fluorinated chain ester, and 20 to 40% by volume of methyl ethyl carbonate,
in the non-aqueous solvent, the total content of ethylene carbonate and propylene carbonate is 20 to 30% by volume, and the total content of dimethyl carbonate and the fluorinated chain ester is 30 to 40% by volume, and
the flash point of the non-aqueous electrolytic solution is 20° C. or higher.
Or alternatively, the non-aqueous electrolytic solution according to a second aspect of the present invention is a non-aqueous electrolytic solution for a lithium secondary battery or a lithium ion capacitor, including a lithium salt as dissolved in a non-aqueous solvent in a concentration of 0.9 to 1.5 m (mol/L), wherein
the non-aqueous solvent includes, in relation to the whole of the non-aqueous solvent, 5 to 25% by volume of ethylene carbonate, 5 to 25% by volume of propylene carbonate, 20 to 30% by volume of dimethyl carbonate, 20 to 40% by volume of methyl ethyl carbonate, and 10 to 20% by volume of ethyl propionate,
in the non-aqueous solvent, the total content of ethylene carbonate and propylene carbonate is 20 to 30% by volume, and the total content of dimethyl carbonate and ethyl propionate is 30 to 40% by volume, and
