Patent ID: 8119293
Filing Date: 2012-02-21
Classification: H01M,Y02E,Y02P

Abstract:
1. A non-aqueous electrolyte secondary cell comprising: a positive electrode having an active material capable of inserting and extracting lithium; a negative electrode having an active material capable of inserting and extracting lithium; and a non-aqueous electrolyte containing a non-aqueous solvent and an electrolyte salt, the non-aqueous solvent containing ethylene carbonate in the range of 25% to 40% by volume under the conditions of 25° C. and 1 atm, wherein the non-aqueous electrolyte further comprises 1,3-dioxane and a dinitrile compound as additives; wherein the dinitrile compound content is in the range of 0.3% to 3.0% by mass relative to the total mass of the non-aqueous electrolyte; and wherein the 1,3-dioxane content is in the range of 0.3% to 3.0% by mass relative to the total mass of the non-aqueous electrolyte; and the dinitrile compound is selected from the group consisting of adiponitrile, pimelonitrile and sebaconitrile.