Preparation method of transition metal fluoride-doped composite hydrogen storage material, and application thereof in hydrogen storage material

A hydrogen storage material and transition metal technology, applied in non-metallic elements, hydrogen, inorganic chemistry, etc., can solve the problem of high initial hydrogen desorption temperature, and achieve the effects of low cost, easy mass production and simple process

Active Publication Date: 2018-04-20
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 1. The initial hydrogen desorption temperature is still high, higher than 150°C;

Method used

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  • Preparation method of transition metal fluoride-doped composite hydrogen storage material, and application thereof in hydrogen storage material
  • Preparation method of transition metal fluoride-doped composite hydrogen storage material, and application thereof in hydrogen storage material

Examples

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Effect test

Embodiment 1

[0026] A transition metal fluoride-doped composite hydrogen storage material, LiBH 4 -2LiNH 2 -MgH 2 -0.05NiF 2 A method for preparing a hydrogen storage material, comprising the following steps:

[0027] Step 1) Weighing of raw materials: under the protection of argon, weigh 0.088 g LiBH 4 , 0.1856 g LiNH 2 , 0.1064 gMgH 2 and 0.02 g NiF 2 Powder, 0.4 g in total;

[0028] Step 2) Preparation of composite hydrogen storage materials by ball milling: under the protection of argon, put the balls and the raw materials weighed in step 1) into a ball mill jar and seal it; then put the ball mill jar into the ball mill, set the ball milling speed to 200 rpm, and the ball milling time to 2 h to obtain LiBH 4 -2LiNH 2 -MgH 2 -0.05NiF 2 Hydrogen storage material.

Embodiment 2

[0030] A transition metal fluoride-doped composite hydrogen storage material, LiBH 4 -2LiNH 2 -MgH 2 -0.05CoF 2 A method for preparing a hydrogen storage material, comprising the following steps:

[0031] Step 1) Weighing of raw materials: under the protection of argon, weigh 0.088 g LiBH 4 , 0.1856 g LiNH 2 , 0.1064 gMgH 2 and 0.02 g CoF 2 Powder, 0.4 g in total;

[0032] Step 2) Preparation of composite hydrogen storage materials by ball milling: under the protection of argon, put the balls and the raw materials weighed in step 1) into a ball mill jar and seal it; then put the ball mill jar into the ball mill, set the ball milling speed to 200 rpm, and the ball milling time to 2 h to obtain LiBH 4 -2LiNH 2 -MgH 2 -0.05CoF 2 Hydrogen storage material.

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Abstract

The invention discloses a transition metal fluoride-doped composite hydrogen storage material. The material is prepared through mixing and mechanically ball-milling LiBH4, LiNH2, MgH2 and transition metal fluoride. The initial hydrogen desorption temperature of the material is 90-100 DEG C, the second-step hydrogen desorption temperature is about 150 DEG C, hydrogen desorption is mainly completedat 180-200 DEG C, and the composite hydrogen storage desorbs 6.5-7.0 wt% of hydrogen when heated to 200 DEG C. A preparation method of the material comprises the following steps: 1, weighing raw materials; and 2, carrying out a ball-milling process to prepare the composite hydrogen storage material. The composite hydrogen storage material has the following advantages: 1, the hydrogen desorption temperature is low, and the amount of hydrogen desorption heat is large; 2, the hydrogen desorption quantity is large; 3, the induction period in a second-step hydrogen desorption process used as the speed control step in the hydrogen desorption process is greatly shortened, the second-step hydrogen desorption temperature is reduced, the hydrogen desorption processes in two steps are coordinated, the hydrogen desorption reaction rate is fast, and the dehydrogenation kinetics performance is good; and 4, the cost of raw materials is low, and the synthesis method has a simple process. The preparation method has a certain application prospect in the field of hydrogen storage materials.

Description

technical field [0001] The invention relates to the technical field of hydrogen storage materials for new energy materials, in particular to a preparation method of a transition metal fluoride-doped composite hydrogen storage material and its application in hydrogen storage materials. Background technique [0002] Hydrogen energy is known as the new energy of the 21st century due to its high efficiency, cleanliness, and renewability, and has attracted worldwide attention. The development and utilization of hydrogen energy involves four key technologies of hydrogen preparation, storage, transportation and application. Due to the problems of hydrogen inflammability, explosion, easy diffusion, and low volumetric energy density at normal temperature and pressure, the storage of hydrogen Technology has become the bottleneck for the practical and large-scale utilization of hydrogen energy. Therefore, the development of high energy density, high efficiency and safe hydrogen storag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/00
CPCC01B3/001Y02E60/32
Inventor 徐芬吴燚鹏孙立贤杨侠于芳褚海亮张焕芝向翠丽
Owner GUILIN UNIV OF ELECTRONIC TECH
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