The hydrogen storage alloy electrode, and a hydrogen storage alloy electrode alkaline battery

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PROBLEM TO BE SOLVED : To reform hydrogen storage alloy used in a hydrogen storage alloy electrode and to improve a discharging characteristic of an alcali accumulating battery under low temperature. SOLUTION : The hydrogen storage alloy electrode using hydrogen storage particles which are expressed by a general formula Ln1-xMgxNiyAzincludes an oxidized film formed on at least a part of a surface of the hydrogen storage alloy particles, oxygen concentration in the hydrogen storage alloy is 0.15 mass% or more and 1.5 mass% or less and oxygen mass per unit surface area in the hydrogen storage alloy particles is more than 0.5 g/m2and 7.0 g/m2. In the formula : Ln is at least one element selected from a rare earth element including Y, Ca, Zr and Ti; A is at least one element selected from Co, Mn, Fe, V, Cr, Nb, Al, Ga, Zn, Sn, Cu, Si, P and B and a condition of 0.05≤x≤0.25, 0COPYRIGHT : (C)2009, JPO&INPIT