The invention discloses a negative
electrode hydrogen storage material for a
nickel-
hydrogen battery capable of being used at a low temperature, which comprises the
atomic ratio ingredient composition shown as the following formula: RExMg<1-x>NiyxMz, wherein in the formula, x is greater than or equal to 0.7 and is smaller than or equal to 1, y is greater than or equal to 3.5 and is smaller than or equal to 3.9, z is greater than or equal to 1 and is smaller than or equal to 1.4, RE is one kind of materials or a mixture prepared from several kinds of materials at any mixture ratio in
rare earth metals La, Ce, Pr or Nd, Ce-enriched mixed
rare earth metal Mm, and La-enriched mixed
rare earth metal Ml, and M is one kind of materials or a mixture of several kinds of materials at any mixture ratio in
transition metal elements Co, Al, Mn, Fe, Cr and Ti. The discharging capacity during the application of the
nickel-
hydrogen battery negative
electrode hydrogen storage alloy material of the invention under the low temperature (i.e. the temperature is ranged from 35 DEG C below zero to 0 DEG C) is much higher than the electrochemical discharging capacity of the existing products sold on markets, and the low-temperature performance is greatly improved. In addition,
nickel-hydrogen battery products prepared from the negative
electrode hydrogen storage material and the electrolytic solution of the invention have the characteristics of high low-temperature electrochemical capacity, obviously improved self discharging performance and high-speed discharging performance, wide application temperature range and the like, and can completely meet the requirement of normal use in low-temperature and normal-temperature environment.