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Nickel titanate doped lithium aluminum hydride hydrogen-storage material and preparation method thereof

A technology of lithium aluminum hydride and hydrogen storage materials, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve the problems of MgH2 catalytic effect difference, reduced hydrogen release amount, high hydrogen release temperature, etc., and achieve low cost and high hydrogen release The effect of performance improvement and simple preparation process

Active Publication Date: 2020-02-21
GUILIN UNIV OF ELECTRONIC TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007]Technical solution for the above two metal compounds TiO2 and NiTiO3 catalyzed hydrogen desorption performance of hydrogen storage materials , showing the following technical problems: 1) The initial hydrogen desorption temperature is high; 2) The addition of a large amount of catalyst leads to a decrease in the final hydrogen desorption amount
By comparing the technologies of Huangt and Mukesh, it can be seen that MgH2 is used as the hydrogen storage material, and different metal compounds are used to improve its hydrogen desorption performance. The catalytic effect of sub>2 produced a significant difference
[0008]However, the inventors found that there is a problem of matching between the hydrogen storage material and the catalyst, that is, the root of the above problem lies in solving the matching problem of the hydrogen storage material and the catalyst

Method used

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  • Nickel titanate doped lithium aluminum hydride hydrogen-storage material and preparation method thereof
  • Nickel titanate doped lithium aluminum hydride hydrogen-storage material and preparation method thereof
  • Nickel titanate doped lithium aluminum hydride hydrogen-storage material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] A preparation method of nickel titanate doped lithium aluminum hydride hydrogen storage material, comprising the following steps:

[0037] Step 1) Preparation of rod-shaped nickel titanate, with nickel chloride and butyl titanate at a ratio of 1:1, weigh 2.3769g of nickel chloride hexahydrate, add to 80 mL of ethylene glycol and stir to dissolve , then weighed 3.4 mL butyl titanate, slowly added to the above solution, and reacted for 3 h under the condition of 25 ℃ and 90 rpm / min magnetic stirring, and dissolved the obtained green suspension in absolute ethanol Centrifuge at 5000 rpm / min for 3 times, each centrifugation time is 10 min, and the centrifuged product is dried at 80 °C for 10 h under vacuum, and the dried product is put into a muffle furnace to raise the temperature to 600 °C at a rate of 5 °C / min. ℃, heat preservation for 1 hour to obtain rod-shaped nickel titanate;

[0038] Step 2) Nickel titanate doped lithium aluminum hydride hydrogen storage material (...

Embodiment 2

[0048] A nickel titanate doped lithium aluminum hydride hydrogen storage material (NiTiO 3 Content is the preparation method of 2 wt%), and the steps not specified in particular are the same as in Example 1, the difference is that: in the step 2, NiTiO 3 The addition amount of NiTiO was 2 wt%, and 0.0100 g NiTiO was weighed in an argon atmosphere glove box 3 and 0.4900 g LiAlH 4 .

[0049] Will get NiTiO 3 The lithium aluminum hydride hydrogen storage material with a content of 2 wt% was subjected to a temperature-rising dehydrogenation test. The test method was the same as in Example 1, and the test results were as follows figure 2 As shown, the initial hydrogen desorption temperature is 95 ℃, and the hydrogen desorption amount is 7.0 wt% when the temperature rises to 300 ℃.

Embodiment 3

[0051] A nickel titanate doped lithium aluminum hydride hydrogen storage material (NiTiO 3 Content is the preparation method of 8 wt%), the step that does not specify in particular is identical with embodiment 1, difference is: in described step 2, NiTiO 3 The addition amount of NiTiO was 8 wt%, and 0.0400 g NiTiO was weighed in an argon atmosphere glove box 3 and 0.4600 g LiAlH 4 .

[0052] Will get NiTiO 3 The lithium aluminum hydride hydrogen storage material with a content of 8 wt% was subjected to a temperature-rising dehydrogenation test. The test method was the same as in Example 1, and the test results were as follows figure 2 As shown, the initial hydrogen desorption temperature is 98 ℃, and the hydrogen desorption amount is 6.9 wt% when the temperature rises to 300 ℃.

[0053] Therefore, NiTiO 3 The lithium aluminum hydride hydrogen storage material with a content of 6 wt% has the best hydrogen desorption performance. As shown in the figure, the initial hydrog...

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Abstract

The invention discloses a nickel titanate doped lithium aluminum hydride hydrogen-storage material. The material is prepared by mixing and mechanically ball-milling lithium aluminum hydride and nickeltitanate NiTiO3, wherein the nickel titanate NiTiO3 is prepared by calcining precipitates generated by reaction of nickel chloride and butyl titanate in ethylene glycol, the nickel titanate NiTiO3 isin a rod shape with the length of 1-4 [mu]m and the width of 0.5-2 [mu]m, and the addition amount of the nickel titanate NiTiO3 accounts for 2-8 wt% of the total mass. The preparation method comprises the steps: 1) preparing rod-like nickel titanate; and 2) preparing the nickel titanate doped lithium aluminum hydride hydrogen-storage material. As application in the field of hydrogen storage, whenthe doping amount of the catalyst is 2 wt%, the hydrogen desorption temperature of the system is reduced to 95 DEG C, and the hydrogen desorption amount reaches 7.0 wt%; when the doping amount of thecatalyst is 6 wt%, the hydrogen desorption temperature of the system is reduced to 73 DEG C, and the hydrogen desorption amount reaches 7.2 wt%. The hydrogen storage material has the following advantages: 1, the hydrogen desorption performance of lithium aluminum hydride is effectively improved, and the hydrogen storage material has high hydrogen desorption capacity after a small amount of catalyst is added; and 2, the method has the advantages of low cost, simple preparation process, controllable reaction and the like.

Description

technical field [0001] The invention relates to the technical field of hydrogen storage materials for new energy materials, in particular to a nickel titanate (NiTiO 3 ) doped lithium aluminum hydride hydrogen storage material and a preparation method thereof. Background technique [0002] Traditional fossil energy such as petroleum and coal are becoming increasingly exhausted with the continuous use of human beings. The resulting energy crisis restricts the development of human society. It has become the consensus of all mankind to find green, efficient and renewable new energy to replace fossil energy, and A lot of research results have been obtained. Hydrogen energy has the advantages of abundant raw material sources, high energy density, environmentally friendly products, and renewable energy, and has become one of the most potential alternative energy sources at present. At present, the development and utilization of hydrogen energy mainly faces three key problems of ...

Claims

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Application Information

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IPC IPC(8): C01B3/00
CPCC01B3/0078Y02E60/32
Inventor 孙立贤岑文龙徐芬陈沛荣赵莉胡锦炀夏永鹏魏胜程日光张晨晨詹浩管彦洵
Owner GUILIN UNIV OF ELECTRONIC TECH
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