Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A core-shell structure magnesium-based hydrogen storage material

A technology of hydrogen storage material and core-shell structure, applied in metal processing equipment, transportation and packaging, etc., can solve undiscovered problems, achieve the effects of improving hydrogen absorption and desorption performance, improving kinetic and thermodynamic performance, and reducing temperature

Active Publication Date: 2018-01-16
SOUTH CHINA UNIV OF TECH
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It is found from comprehensive literature that before the completion of the present invention, no reports have been found that titanium metal alkoxides are used to directly prepare titanium oxide-coated magnesium particle materials in ethanol by sol-gel method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A core-shell structure magnesium-based hydrogen storage material
  • A core-shell structure magnesium-based hydrogen storage material
  • A core-shell structure magnesium-based hydrogen storage material

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The invention discloses a method for preparing a magnesium-based hydrogen storage material with a core-shell structure, the preparation method comprising the following steps:

[0030] Step 1, preparing a precursor solution with a certain concentration and ultrasonically mixing it with a certain mass of magnesium particles to obtain a suspension of magnesium particles;

[0031] Step 2. Slowly add 95% ethanol solution dropwise to the suspension of the above-mentioned magnesium particles under the condition of vigorous stirring, and let it stand for 12 hours, and the titanium metal alkoxide undergoes hydrolysis reaction to form titanium hydroxide, which is coated on the surface of magnesium particles;

[0032] Step 3: Centrifuge and wash the suspension obtained in the above steps, and heat the obtained sample at 400°C under vacuum for 12 hours to obtain a magnesium-based hydrogen storage material with a core-shell structure coated with titanium oxide.

[0033] The precurs...

Embodiment 1

[0039] (1) Prepare a 0.05 g / ml ethanol solution of tetrabutyl titanate, stir for 2 hours to make it evenly mixed;

[0040] (2) Weigh 0.2g of micro-nano magnesium particles, add it to 20ml of absolute ethanol, mix it into a suspension, and mix the 4ml tetrabutyl titanate ethanol solution prepared in (1) with the aforementioned solution at room temperature, Stir evenly and ultrasonically treat for 20 minutes;

[0041] (3) Under the condition of vigorous stirring, slowly drop 8 ml of 95% ethanol solution into the suspension of micro-nano magnesium particles, and let it stand for 12 hours;

[0042] (4) wash 3 times with absolute ethanol, vacuum dry, collect powder;

[0043] (5) Insulate the dried powder at 400°C and vacuum for 12 hours and slowly cool it to take out the powder sample, which is the magnesium particle material coated with titanium oxide, wherein the titanium oxide in the shell is TiO 2 , The thickness of the shell is about 30-60nm.

[0044] figure 1 Mg@TiO prepa...

Embodiment 2

[0046] (1) Prepare a 0.05 g / ml ethanol solution of tetrabutyl titanate, stir for 2 hours to make it evenly mixed;

[0047] (2) Weigh 0.2g of micro-nano magnesium particles, add it to 20ml of absolute ethanol, mix it into a suspension, and mix the 8ml tetrabutyl titanate ethanol solution prepared in (1) with the aforementioned solution at room temperature, Stir evenly and ultrasonically treat for 20 minutes;

[0048] (3) under the condition of vigorous stirring, slowly drop 16 ml of 95% ethanol solution into the suspension of micro-nano magnesium particles, and let it stand for 12 hours;

[0049] (4) wash 3 times with absolute ethanol, vacuum dry, collect powder;

[0050] (5) Insulate the dried powder at 400°C and vacuum for 12 hours and slowly cool it to take out the powder sample, which is the magnesium particle material coated with titanium oxide, wherein the titanium oxide in the shell is TiO 2 , The thickness of the shell is about 60-100nm.

[0051] figure 2 Mg@TiO pr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a magnesium-based hydrogen storage material with a core-shell structure. In the composition of the magnesium-based hydrogen storage material with a core-shell structure, the mass percentage of magnesium particles is 60-85%, and the mass percentage of titanium oxide in the shell layer is 15-40%. In the shell titanium oxide TiOx, x=0.5-1.8; the magnesium particles are nano or micron particles, and the thickness of the shell titanium oxide is 60-200nm. The preparation method of the present invention adopts a sol-gel method to prepare a titanium oxide shell, the shell titanium oxide can effectively improve the hydrogen absorption and desorption performance of magnesium, and the core-shell structure material is stable and oxidation-resistant in air; the present invention Magnesium-based materials with a core-shell structure are applied to solid-state hydrogen storage, which can effectively increase the rate of hydrogen absorption and desorption, and reduce the temperature required for the hydrogen absorption and desorption process. The preparation method of the magnesium-based hydrogen storage material of the present invention is relatively simple to operate, the synthesis temperature is low, the conditions are easy to control, and the shell layer of the magnesium-based hydrogen storage material can be uniformly coated.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage materials, and relates to a titanium oxide material coated on the surface of nanometer or micrometer magnesium particles through a sol-gel method using titanium metal alkoxide as a precursor, in particular to a core-shell structure Magnesium-based hydrogen storage material and preparation method thereof. Background technique [0002] As the most basic power support for human survival and development in the 21st century, energy is one of the problems that need to be solved urgently in the world today. Hydrogen energy, as a clean and ideal secondary energy source, has attracted widespread attention from all over the world. Magnesium-based hydrogen storage materials have very broad application prospects due to their advantages of high hydrogen storage capacity, abundant raw materials, low price, light weight, and little environmental pollution. hydrogen storage alloy materials. For MgH 2 ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02
CPCB22F1/16
Inventor 王辉卢彦杉朱敏欧阳柳章刘江文胡仁宗曾美琴
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com