Hydrogen storage alloy suitable for high-pressure-metal hydride hydrogen storage and preparation method of hydrogen storage alloy

Abstract

The invention discloses a hydrogen storage alloy suitable for high-pressure-metal hydride hydrogen storage and a preparation method of the hydrogen storage alloy, and relates to the field of new energies. Ti-Cr-Fe-Mn-based alloy is adopted, so that the content of rich and low-price elements in two crusts of Fe and Mn is greatly increased in the aspect of specific components, and the hydrogen storage alloy has the characteristics of low cost, high hydrogen storage content and high hydrogen storage pressure. The hydrogen storage alloy does not need to be vacuumized at high temperature and normaltemperature and inoculated at low temperature for a period of time to absorb hydrogen during activation, can be completely activated for 3-5 times, and is high in hydrogen release speed; the hydrogenrelease plateau pressure under the condition of 243K is 1.0-2.5 MPa, the maximum hydrogen storage capacity can reach 1.88 wt% or above, the reversible hydrogen storage capacity reaches 1.63 wt% at the temperature of 272 K, and the hydrogen release plateau pressure under the condition of 318-338 K is 15-50 MPa; and the alloy cost is low, the hydrogen storage alloy is suitable for a 45 MPa hydrogenrefueling station and can be widely applied to hydrogen refueling stations, the hydrogen refueling capacity of the hydrogen refueling station is improved, the hydrogen output pressure of the hydrogenstorage tank is improved, the stability of hydrogen output is improved, the requirements of different occasions are met, and the higher application and popularization value is achieved.

Description

technical field [0001] The invention relates to the field of new energy, in particular to a hydrogen storage alloy suitable for high-pressure-metal hydride hydrogen storage and a preparation method thereof. Background technique [0002] Traditional energy consumption has brought huge environmental pollution, including global warming, acid rain, light pollution, etc., which have brought great harm to human body and life. Non-renewable energy still occupies a very large proportion in today's society, and the effective use of renewable energy has become an important issue that needs to be solved urgently. [0003] The source of energy determines the pollution base of energy in the social cycle, which will inevitably increase the proportion of renewable energy in the energy society. The shortcomings of renewable energy (wind energy, solar energy, geothermal, tidal energy, biomass) are mainly manifested in Its input and output instability and regional surplus require the transfo...

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Problems solved by technology

[0005] The maximum pressure of the hydrogen storage container in the existing hydrogen refueling station is generally 45 MPa. Among the different series of hydrogen storage alloys, although the manufacturing cost of TiFe alloy is low, it is difficult to activate and easy to poison, LaNi 5 The hydrogen storage pressure of the rare earth system and the Mg system is low, and more heat consumption is required in the hydrogen absorption and desorption process, and it exceeds the optimum operating temperature range of the IV bottle, while the Ti-Cr-Fe-Mn-based alloy has a higher Hydrogen storage capacity, the price difference of Ti, Cr, Fe, Mn elements is relatively large, Ti is the only A-side alloy of this type of alloy, and the price of elemental metal of B-side elements Cr, Fe, Mn is about 83,000, 15,000, 18,000 yuan

In Ti-Cr-based alloys, the B-side element Cr has a large proportion, and the metal Cr is expensive and the preparation cost is high

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