Patent ID: 8465874
Filing Date: 2013-06-18
Classification: H01M,Y02E,Y02P,Y02T,Y10T

Abstract:
1. A lithium-ion secondary battery having a battery capacity of 5 Ah or more, the lithium-ion secondary battery comprising: a positive electrode comprising a positive electrode active material, a first electrically conductive member, a first binder, and a first charge collecting member; a negative electrode comprising a negative electrode active material, a second electrically conductive member, a second binder, and a second charge collecting member; and an electrolyte containing an electrolytic salt, wherein an electrical resistivity of a mixture of the positive electrode active material, the first electrically conductive member, and the first binder is 0.1 Ωcm or more but 1 Ωcm or less, the positive and negative electrodes each have an electrical capacity of 10 mAh or more but 50 mAh or less per volume of a rectangular parallelepiped that has a 1 cm a capacity ratio of the negative electrode to the positive electrode is 1 or more but 1.5 or less, and the negative electrode is formed by sintering negative electrode ingredients including graphite powder, non-graphitizing carbon, and fibrous powder in pores of a porous metal structure used as the second charge collecting member.