McDermott Will & Emery LLP
Non-aqueous electrolyte secondary battery
A non-aqueous electrolyte secondary battery including a positive electrode and a negative electrode each capable of absorbing and desorbing lithium, a separator interposed therebetween, and a non-aqueous electrolyte, wherein the positive electrode includes a positive electrode active material represented by: LiM1-xLxO2 where 0.005≦x≦0.1 is satisfied, M is at least one selected from the group consisting of Mn, Co and Ni, and L is at least one selected from the group consisting of Mg, Al, Ti, Sr, Zn, B, Ca, Cr, Si, Ga, Sn, P, V, Sb, Nb, Ta, Mo, W, Zr, Y and Fe, and the non-aqueous electrolyte includes a phosphinate compound represented by:where R1, R2 and R3 are each independently an aryl group, or an alkyl group, an alkenyl group or an alkynyl group each having 1 to 5 carbon atoms.
Mitsubishi Chemical Corporation Panasonic Corporation
Y H Y H H H H Y Y H H H H H H H
Y02P H01M Y02E H01M H01M H01M H01M Y02E Y02T H01M H01M H01M H01M H01M H01M H01M
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Hiroshi Shinichi Masamichi Masaki Tooru
Yoshizawa Kinoshita Onuki Deguchi Matsui