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Preparation method and application of a manganese titanate-doped sodium aluminum hydride hydrogen storage material

A technology of sodium aluminum hydride and hydrogen storage materials, which is applied to chemical instruments and methods, manganese compounds, hydrogen, etc., can solve the problems of simple preparation process and the need to reduce the price of raw materials, and achieve low price, fast hydrogen release speed, and process simple effect

Active Publication Date: 2021-09-24
GUILIN UNIV OF ELECTRONIC TECH
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  • Claims
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Problems solved by technology

Although the existing research and development work has achieved many results, the comprehensive hydrogen storage performance of sodium aluminum hydride still needs to be further improved, and the simplicity of the preparation process and the price of raw materials also need to be reduced.

Method used

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  • Preparation method and application of a manganese titanate-doped sodium aluminum hydride hydrogen storage material
  • Preparation method and application of a manganese titanate-doped sodium aluminum hydride hydrogen storage material
  • Preparation method and application of a manganese titanate-doped sodium aluminum hydride hydrogen storage material

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Embodiment

[0022] Preparation of a sodium aluminum hydride hydrogen storage material doped with manganese titanate

[0023] Step 1) Preparation of manganese titanate, weigh 5.75 g manganese carbonate and 4.0 g titanium dioxide respectively, grind and mix manganese carbonate and titanium dioxide powder to obtain a mixture, and then heat the mixture in a muffle furnace at a rate of 10 ℃ / min from The room temperature is raised to 900 ° C for calcination, and the temperature is kept for 6 hours to obtain manganese titanate;

[0024] Step 2) Under the protection of argon, weigh 0.4275 g of sodium aluminum hydride and 0.0225 g of manganese titanate and place them in a ball mill jar, put 45 g of steel balls into it, seal it, then put the ball mill jar into the ball mill, and set the ball mill The rotation speed is 250r / min, the ball milling time is 3 hours, ball milling is carried out, and then the ball milling product is taken out under the condition of argon to obtain NaAlH 4 -5 wt%MnTiO 3 ...

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Abstract

The invention discloses a material for improving the hydrogen storage performance of sodium aluminum hydride, which is prepared by mechanical ball milling of sodium aluminum hydride and manganese titanate. The initial hydrogen desorption temperature is about 75°C, the second hydrogen desorption temperature is about 160°C, and the main hydrogen desorption is completed in the range of 140°C~225°C; when heated to 225°C, the composite hydrogen storage material emits 5.1 wt%~5.4 wt% hydrogen. The preparation method includes: 1) preparation of manganese titanate; 2) preparation of sodium aluminum hydride hydrogen storage material doped with manganese titanate powder. The present invention has the following advantages: 1. The doped sodium aluminum hydride has a lower hydrogen desorption temperature; 2. The hydrogen desorption capacity is larger; 3. The hydrogen desorption speed is fast; 4. The raw material cost is low, and the synthesis method and process Simple, safe and reliable. The material 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 and application of a sodium aluminum hydride hydrogen storage material doped with manganese titanate. Background technique [0002] Due to its high efficiency, cleanliness, and renewable characteristics, hydrogen energy has attracted extensive attention from researchers. The development and utilization of hydrogen energy involves four key technologies of hydrogen production, storage, transportation and application. Due to the problems of flammability, explosion, and easy diffusion of hydrogen, as well as low volume energy density at normal temperature and pressure, hydrogen storage technology has become a bottleneck for the practical and large-scale utilization of hydrogen energy. Therefore, the development of hydrogen storage technology with high energy density, high efficiency and high safety performance is a key...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/00C01G45/00
CPCC01B3/0078C01G45/00C01P2002/72Y02E60/32
Inventor 徐芬杨侠孙立贤于芳张焕芝郭晓磊夏永鹏陈沛荣褚海亮邹勇进
Owner GUILIN UNIV OF ELECTRONIC TECH
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