| 摘要 |
PURPOSE:To increase charge-discharge cycle performance, to limit discharge capacity by that of a negative electrode, and to widen the range of usable materials by making the charge-discharge capacity of a positive electrode larger than that of a negative electrode in a nonaqueous electrolyte secondary battery comprising a positive electrode, a nonaqueous electrolyte, and a negative electrode using a specific carbon as active material. CONSTITUTION:As a negative electrode of a secondary battery using nonaqueous organic solvent, a carbon body mainly comprising carbon which is formed from a hydrocarbon compound by vapor phase build-up method by low temperature heat decomposition at 1500 deg.C or lower and has planar net-like six-membered ring atructure (graphite structure) having disorder layer structure and selective orientation structure is used, and the capacity of the negative electrode is made smaller than that of a positive electrode. A main planar spacing of the carbon is 0.337-0.355nm. The ratio of Raman strength 1360cm<-1>, to Raman strength of 1580cm<-1> in Raman structure is 0.4-1.0. V2O5, Cr2O3, chalcogen compound, and composite or mixture of these compounds are used in the positive electrode. |
