A high-capacity solid-solution magnesium-based hydrogen storage alloy for low-temperature hydrogen absorption and its preparation method

By adding rare earth element Sc to magnesium-based alloys to form MgSc solid solution alloys, the problems of low-temperature hydrogen absorption and cycle stability of magnesium-based hydrogen storage materials are solved, achieving high-capacity hydrogen storage performance, which is suitable for industrial production.

CN122303703APending Publication Date: 2026-06-30HARBIN INST OF TECH
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN INST OF TECH
Filing Date
2026-05-08
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Magnesium-based hydrogen storage materials have difficulty absorbing hydrogen at low temperatures, have high hydrogen release temperatures, poor cycle stability, and poor kinetic performance.

Method used

By adding rare earth element Sc to magnesium-based alloys, MgSc solid solution alloys are formed. The solid solution effect of Sc and the in-situ SCH2 nanocatalytic phase are used to improve the diffusion and hydrogen absorption and desorption kinetics of hydrogen atoms. The amount of alloying elements added is precisely controlled by resistance melting technology.

Benefits of technology

It significantly improves the low-temperature hydrogen absorption performance and structural stability of magnesium-based hydrogen storage alloys, enhances hydrogen absorption and desorption kinetics and cycling performance, and is suitable for large-scale industrial production.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122303703A_ABST
    Figure CN122303703A_ABST
Patent Text Reader

Abstract

This invention relates to a high-capacity solid-solution magnesium-based hydrogen storage alloy for low-temperature hydrogen absorption and its preparation method. The purpose of this invention is to solve the problems of slow kinetics and unstable cycle performance in magnesium-based hydrogen storage alloys. The solid-solution magnesium-based hydrogen storage alloy is Mg... 100‑x Sc x Cast alloy. The preparation method is as follows: raw materials are weighed according to atomic ratio, then vacuum dried, and then melted at a temperature of 750-850℃. After uniform stirring, the mixture is cast into a mold to obtain a cast alloy. This invention adds the rare earth element Sc, which causes a change in the Mg lattice by the addition of solid solution element Sc, thus disrupting the stability of MgH2. Simultaneously, Sc has stronger metallic properties than Mg, preferentially forming the ScH2 catalytic phase, thereby improving the hydrogen absorption and desorption kinetics rate. This invention is applied in the field of solid-state hydrogen storage.
Need to check novelty before this filing date? Find Prior Art