Patent ID: 6436577
Filing Date: 2002-08-20
Classification: H01M,Y02E

Abstract:
A non-aqueous electrolyte secondary battery provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte solution, characterized in that a lithium-containing composite nickel oxide represented by LiNi1âˆ’xMxO2 (wherein M denotes at least one type of element selected from the group consisting of Co, Ti, V, Mn, Fe, Sn, B, Al, Si, and P and the relationship, 0&lE;x&lE;0.5, is satisfied) is used as a chief component of the positive electrode material for the positive electrode, Li4Ti5O12 is used as a chief component of the negative electrode material for the negative electrode, and the solvent of the non-aqueous electrolyte solution contains a cyclic carbonic ester and a chain carbonic ester, the cyclic carbonic ester and the chain carbonic ester each being contained in amounts of not less than 10% by volume of the whole solvent, respectively, and the total content of the cyclic carbonic ester and the chain carbonic ester being not less than 60% by volume of the whole solvent, whereinat least one of ethylene carbonate, propylene carbonate, and butylene carbonate is contained as said cyclic carbonic ester while at least one of dimethyl carbonate, methyl ethyl carbonate, methyl propyl carbonate, diethyl carbonate, and ethyl propyl carbonate is contained as said chain carbonic ester; and wherein the charge cut-off voltage thereof is not more than 2.7 V.