Organic electrolytic solution and lithium battery employing the same

Abstract

An organic electrolytic solution and a lithium battery employing the same are provided. The organic electrolytic solution includes: a lithium salt; an organic solvent containing a high dielectric constant solvent and a low boiling point solvent; and a dicarboxylic acid derivative having at least one substituted silyl group. The organic electrolytic solution and the lithium battery employing the same have improved reductive decomposition stability, thereby decreasing an irreversible capacity after a first cycle and improving the charge / discharge efficiency and lifespan of the battery. The lithium battery has non-varying chemical properties at room temperature and a uniform thickness after standard charging, and thus has high reliability.

Description

Technical field

[0001] The present invention relates to a lithium battery. More specifically, the present invention relates to an organic electrolyte solution having high reliability because the thickness of the battery is maintained within an allowable range, and a lithium battery using the same. Background technique

[0002] As portable electronic devices, such as video cameras, cell phones, notebook computers, etc., become lighter and have increasingly improved performance, more research must be conducted on batteries used as power sources for such electronic devices. In particular, the energy density per unit weight of rechargeable lithium secondary batteries is 3 times higher than that of conventional lead storage batteries, nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, etc., and can be quickly charged, so it is currently the most inclined Research object.

[0003] In lithium ion batteries, transition metal compounds such as LiNiO 2 , LiCoO 2 , ...

Images