Transition metal-N/C composite magnesium-based hydrogen storage material and preparation method thereof

A technology of hydrogen storage material and composite material, which is applied in the field of transition metal-N/C composite magnesium-based hydrogen storage material and its preparation, can solve the problem that it cannot withstand ball milling treatment, the alloy is difficult to refine, and it is easy to adhere to the grinding ball and It can improve the reversible hydrogen storage characteristics, increase the brittleness and improve the efficiency of ball milling.

CN113104811AInactive Publication Date: 2021-07-13TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-07-13
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a transition metal-N / C composite magnesium-based hydrogen storage material and a preparation method thereof, belonging to the technical field of hydrogen storage materials. The main component of the hydrogen storage material is magnesium, and the hydrogen storage material is prepared by synergistic catalysis of rare earth, transition metal nitrate and a nitrogenous polyvinylpyrrolidone polymer, and has a nanocrystalline structure and excellent low-temperature hydrogen absorption and desorption dynamic performance. The preparation method of the hydrogen storage material comprises the following steps: preparing a magnesium-rare earth as-cast hydrogen storage alloy, preparing a transition metal-N / C composite material, compounding the magnesium-rare earth as-cast hydrogen storage alloy and the transition metal-N / C composite material by using a mechanical ball milling method, performing cooling, and carrying out low-temperature passivation to obtain the transition metal-N / C composite magnesium-based hydrogen storage material. According to the invention, rare earth elements are added into magnesium, the reversible hydrogen storage characteristic of the magnesium is greatly improved through the synergistic catalysis effect of the rare earth elements, carbon, nitrogen and transition metal, the wall sticking phenomenon in a mechanical ball milling process is overcome, the recovery rate of the material is increased, and the high-capacity magnesium-based composite hydrogen storage material with the excellent low-temperature hydrogen absorption performance is obtained.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of hydrogen storage materials, and in particular relates to a transition metal-N / C composite magnesium-based hydrogen storage material and a preparation method thereof. Background technique

[0002] Hydrogen energy has been extensively studied as a clean, efficient, and safe new energy source, but how to store hydrogen energy safely and efficiently is still a key issue in hydrogen energy applications, compared with traditional gaseous hydrogen storage and liquid hydrogen storage , The solid hydrogen storage material can not only store hydrogen effectively, but also avoid the consumption, leakage and safety problems of hydrogen gas during use. However, among numerous solid-state hydrogen storage materials, only light metals such as Mg can have a high hydrogen storage specific gravity, which is very important for the development of hydrogen storage functional systems that can cover an actual mileage greater th...

Examples

Embodiment 1

[0034] Embodiment 1: Mg+10wt.%Ce;

Embodiment 2

[0035] Embodiment 2: Fe-N / C composite material;

Embodiment 3

[0036] Embodiment 3: (Mg+10wt.%Ce)+3wt.%Fe-N / C;