| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery with superior negative electrode capacity capacitance and discharge cycle characteristics by providing at least two kinds of materials capable of the negative electrode absorbing and emitting lithium ions, these materials performing different electrochemical oxidization reducing reaction and having different equilibrium potentials, and the oxidization and reduction reaction migrating from one material to the other material. SOLUTION: A negative electrode is composed at least of two kinds of materials: a carbon material and a fiber-shaped inorganic component, and contains a fiber-shaped inorganic compound of 1-10 aspect ratio and 10 wt.% to 80 wt.% in weight ratio. A substance having a potential area for oxidization and reduction and reduction reaction reversible in a higher potential area than lithium oxidization and reduction potential includes a fiber-shaped inorganic compound, in particular, metal oxides SnO2 , SnO, SiO2 , PbO2 , and PbO. A substance such as those having a partial common potential area with this, and having a potential area for oxidization and reducing reaction reversible to a lower potential area can include graphite, easily graphitizing hydrocarbon or the like. |
