Secondary battery

There is disclosed a secondary battery having a negative electrode composed of an active substance and a carrier carrying the active substance, which comprises (1) the active substance is lithium or an alkali metal mainly composed of lithium,(2) the carrier is a mixture composed of (a) a carbonaceous material having (i) an atomic ratio of hydrogen/carbon of less than 0.15 and (ii) a spacing of (002) planes (d₀₀₂) as determined by X-ray wide angle diffraction of 3.37 Å or more and a crystallite size in the direction of c axis of 150 Å or less, and(b) a metal capable of forming an alloy with the active substance and/or an alloy with the active substance.