Hydrogen storage material, negative electrode, and nickel hydrogen rechargeable battery

摘要

A hydrogen storage material capable of improving the discharge characteristic at a low temperature of a nickel hydrogen rechargeable battery and a negative electrode and a nickel hydrogen secondary battery using this hydrogen storage material are provided.The hydrogen storage material comprises a hydrogen absorbing alloy particle and a surface modifier attached to the surface of the particle, and has a specific composition.In the X-ray diffraction pattern of this hydrogen storage material2 θ＝ When the relative intensity of the maximum peak Pmax is set to 100.00% of the diffraction peaks appearing in the range of 42.00 to2 θ＝ The relative intensity of the maximum peak P1 appearing in the range of 30.35 to2 θ＝ The relative intensity of the maximum peak P2 appearing within the range of 32.85 to 33.15 degrees is less thanAnd θ＝ The relative intensity of the maximum peak P3 appearing in the range of 51.65 to 51.95 ° is less than 6.00%.