| abstract |
(57) [Abstract] [PROBLEMS] To provide a non-aqueous solvent secondary battery having high capacity and excellent cycle characteristics. A non-aqueous solvent secondary battery comprising a positive electrode 6, a negative electrode 4 made of a carbonaceous material capable of inserting and extracting lithium ions, and a lithium ion conductive electrolyte, wherein the carbonaceous material is Average fiber diameter 2-40 μm, average fiber length 10- 100 μm graphitized mesophase pitch carbon fiber, And a non-aqueous solvent secondary battery, which is mainly composed of a mixture of coke-based carbon particles having an average particle size of 50 to 100 μm. Here, it is preferable to select the component ratio of the graphitized mesophase pitch carbon fiber in the carbonaceous material to 30 to 90% by weight. |