An anode active material for a lithium secondary battery includes a silicon alloy that includes silicon and at least one kind of metal other than silicon, the silicon alloy allowing alloying with lithium. A volume of an inactive region in the silicon alloy...

The positive active material for a secondary battery of the present invention is β-FeOOH containing at least one element selected from the group consisting of B, P, S, Li, Na, K, Mg, Al, Ca, Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Zr, Pb and Sn which shows a d...

An alkaline storage battery using positive electrodes comprising an active material containing nickel hydroxide particles and a rare earth element or a compound thereof containing or mixed with 0.1 - 100 ppm of Fe or an Fe compound based on the rare earth ...