Patent ID: 8673505
Filing Date: 2014-03-18
Classification: H01M,Y02E,Y02P

Abstract:
1. A non-aqueous electrolyte secondary battery comprising a unit cell including a sheet-shaped positive electrode, a sheet-shaped negative electrode, a separator disposed between said positive electrode and said negative electrode, and a non-aqueous electrolyte, wherein: said non-aqueous electrolyte contains a solvent including 50 vol % or more of acetonitrile, said positive electrode includes a positive electrode active material and a positive current collector including aluminum or an aluminum alloy, said positive current collector contacting said non-aqueous electrolyte on both sides of said positive electrode, said positive electrode includes a positive electrode active material comprising a lithium-containing manganese composite oxide having a spinel structure, said negative electrode includes a negative electrode active material comprising a lithium-containing titanium oxide and a negative current collector including aluminum or an aluminum alloy, said negative current collector contacting said non-aqueous electrolyte on both sides of said negative electrode; a positive electrode capacity is greater than a negative electrode capacity, and at least a portion of said acetonitrile is capable of being gasified during the overcharging of said battery; said unit cell further includes a third metal electrode; and said third metal electrode includes at least one selected from the group consisting of nickel, copper, iron, and stainless steel.