| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary cell having superior characteristics in high withstanding voltage, high capacity or high speed charging and discharging cycles. SOLUTION: A secondary cell has a positive electrode which has active carbon as main body, a negative electrode having carbon material which can adsorb or emit lithium ions whose intensity ratio I1360/I1580 of the peak near 1,360 cm-1 to the peak near 1,580 cm-1 in Lyman spectrum is 0.12∼1.0 and carbon material which became graphite, its I1360/I1580 ratio being 0.01∼0.115, and organic electrolyte including lithium base. |
