Non-stoichiometric titanium carbide hydrogen storage material and preparation method thereof

Abstract

According to the non-stoichiometric titanium carbide hydrogen storage material and the preparation method thereof, according to the influence of carbon vacancies and zirconium doping in titanium carbide on the hydrogen storage performance of the material, the carbon vacancies are used as main hydrogen storage positions of the titanium carbide; wherein the hydrogen capacity of the carbon vacanciesis improved through zirconium doping, and the hydrogen storage capacity of the non-stoichiometric titanium carbide hydrogen storage material is improved; meanwhile, ordering of carbon vacancies in thetitanium carbide hydrogen storage material is achieved through long-time high-temperature heat treatment, so that a pathway is provided for diffusion of hydrogen in titanium carbide and the diffusioncapacity of hydrogen is improved; on the one hand, the hydrogen storage and release thermodynamic performance of non-stoichiometric-ratio titanium carbide can be improved, and on the other hand, thehydrogen storage and release efficiency is improved. More importantly, hydrogen atoms can fully enter all carbon vacancies in titanium carbide, so that the hydrogen capacity of the carbon vacancies isexerted, and finally, the non-stoichiometric-ratio titanium carbide hydrogen storage material with excellent performance is prepared.

Description

Technical field: [0001] The invention belongs to the technical field of hydrogen storage materials, and in particular relates to a non-stoichiometric ratio titanium carbide hydrogen storage material and a preparation method thereof. Background technique: [0002] In recent years, in the face of increasingly serious energy shortages and environmental pollution problems, countries have invested a lot of energy in the research, development and utilization of new energy technologies, and have achieved remarkable results, such as the continuous progress and continuous application of solar and wind power technologies. promote. Among them, hydrogen energy is considered as one of the ideal "green energy sources". To realize the application of hydrogen energy, the storage and transportation of hydrogen is a key problem that must be solved. There are many forms of hydrogen storage, among which solid-state hydrogen storage is considered to be one of the main ways of hydrogen storage ...

AI Technical Summary

Problems solved by technology

The existence of carbon vacancies in titanium carbide, that is, its non-stoichiometric ratio characteristics, is a prerequisite for its ability to store hydrogen, but the limitation of the hydrogen storage capacity of carbon vacancies restricts the improvement of the hydrogen storage capacity of titanium carbide. The present invention aims at this The problem is to use carbon vacancies as the main location for hydrogen storage in titanium carbide, improve the hydrogen storage capacity of carbon vacancies by doping zirconium, improve the hydrogen storage capacity of non-stoichiometric titanium carbide hydrogen storage materials, and at the same time target hydrogen in the titanium carbide lattice Difficulty in diffusion, the ordering of carbon vacancies in titanium carbide hydrogen storage materials through long-term high-temperature heat treatment provides an effective channel for the diffusion of hydrogen in titanium carbide, which can improve the storage of non-stoichiometric ratio titanium carbide The thermodynamic performance of hydrogen desorption is more important to enable hydrogen atoms to fully enter each carbon vacancy in titanium carbide, thereby exerting the hydrogen storage capacity of carbon vacancies and further improving the hydrogen storage capacity of titanium carbide