Lithium-ion secondary battery and manufacturing method thereof

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 cm2 square base on a face of the electrode of one polarity facing the electrode of the other polarity and that has a height equal to a thickness of the electrode of the one polarity at the square base,
• 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 and wherein the graphite has an R value of 0.