Method for improving hydrogen storage efficiency through defective carbon nanotube bundle

By preparing and controlling defective single-walled carbon nanotube bundles, the problems of low hydrogen storage efficiency and insufficient mixed gas separation capacity of single-walled carbon nanotubes were solved, achieving efficient hydrogen adsorption and selective separation, and improving hydrogen storage performance.

CN121672499APending Publication Date: 2026-03-17CHONGQING UNIV OF ARTS & SCI
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Patent Information

Application Number
CN202511880587.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-13
Publication Date
2026-03-17

AI Technical Summary

Technical Problem

In the existing technology, single-walled carbon nanotubes have limited hydrogen storage efficiency, the positive effects of defects are not fully utilized, and they lack the ability to selectively separate hydrogen from mixed gases.

Method used

By preparing hexagonal arrayed single-walled carbon nanotube bundles and introducing vacancy defects of at least the critical size on their walls, adjusting the inter-tube distance, and combining suitable temperature and pressure conditions, efficient adsorption and selective separation of hydrogen can be achieved.

Benefits of technology

It significantly improved the hydrogen storage efficiency of single-walled carbon nanotube bundles by nearly double, achieving efficient adsorption and selective separation of hydrogen molecules and optimizing the hydrogen storage performance per unit mass.

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Abstract

The invention relates to the technical field of hydrogen energy storage materials, and discloses a method for improving hydrogen storage efficiency through a defective carbon nanotube bundle, which comprises the following steps: S1, preparing a single-walled carbon nanotube bundle which is formed by arranging a plurality of single-walled carbon nanotubes in a hexagonal array; s2, a vacancy defect is introduced into the tube wall of the single-walled carbon nanotube, and the size of the vacancy defect is not smaller than the critical size NV = 8; s3, adjusting the distance between adjacent single-walled carbon nanotubes in the single-walled carbon nanotube bundle to 5.1-9; and S4, placing the single-walled carbon nanotube bundle with the vacancy defect in a hydrogen-containing atmosphere, and carrying out physical adsorption of hydrogen under set temperature and pressure conditions. Through introduction of vacancy defects, the mass of the carbon nanotubes is reduced, and hydrogen storage efficiency is far higher than that of isolated and perfect single-walled carbon nanotubes in combination with double adsorption sites of in-tube cavities and inter-tube gaps of the single-walled carbon nanotube bundles.
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