text: As a hydrogen storage alloy, LaNi can absorb hydrogen to form the hydride LaNiH (x≈6) when the pressure is slightly high and the temperature is low, or when the pressure decreases or the temperature increases, hydrogen can be released to form repeated absorption and release of hydrogen. But for the dehydrogenation process, because it is an endothermic reaction, in order to enable the reaction to proceed, the necessary energy must be added, otherwise the reaction will stop due to the decrease in temperature.