A non-aqueous electrolytic solution containing a ketone compound having the formula (I): Äeach of R and R independently represents a linear or branched alkyl group; and each of R, R, R and R independently represents a hydrogen atom or a linear or branched...

In order to manufacture a lithium secondary battery having excellent performances in safety under overcharge condition, cycle property, electric capacity, and storage endurance, 0.1 wt.% to 10 wt.% of a tert-alkylbenzene compound is favorably incorporated ...

A nonaqueous electrolytic solution for lithium secondary batteries. When the nonaqueous solvent comprises a combination of an ester of a tertiary carboxylic acid and a cyclic carbonate such as propylene carbonate or ethylene carbonate, a lithium salt havin...

A non-aqueous electrolytic solution favorably employable for a lithium secondary battery employs a non-aqueous solvent composed of a cyclic carbonate, a linear carbonate and vinylene carbonate, and shows a reduction potential of less than 1 volt, with refe...

Disclosed are a carbon porous membranous structure having fine interconnecting pores an average diameter of which is 0.05 to 10 µm and a porosity of 15 to 85% and a metal-dispersed carbon structure comprising that carbon porous membranous structure having...

A discharge capacity retention of a non-aqueous secondary battery is enhanced by incorporating into its non-aqueous electrolytic solution a small amount of a substituted diphenyldisulfide derivative in which each of the diphenyl groups has a substituent su...