Lithium niobate-doped modified Mg-based hydrogen storage material and preparation method thereof
A hydrogen storage material, lithium niobate technology, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve the problem of lack of relevant research and reports on the catalytic performance of magnesium-based hydrogen storage materials, high gasification and liquefaction costs, and hydrogen leakage. and other problems, to achieve the effect of improving the kinetic performance of hydrogen absorption and desorption, improving the kinetic performance of hydrogen absorption and desorption, and balancing the loss of hydrogen storage capacity.
Active Publication Date: 2022-07-29
CHONGQING UNIV
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Problems solved by technology
[0003] The existing hydrogen storage methods mainly face the following problems: (1) The storage conditions are harsh, and it is difficult to store under normal temperature and pressure; (2) The safety is poor, and hydrogen leakage, high-pressure gas cylinders and liquid hydrogen tanks all have great safety hazards ; (3) The hydrogen storage capacity per unit volume is low, the cost of gasification and liquefaction is high, and the transportation is restricted
But so far, LiNbO 3 There are no relevant studies and reports on the catalytic performance of magnesium-based hydrogen storage materials
Method used
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[0027] The technical solutions of the present invention will be further elaborated below in conjunction with the examples, and the following preparation methods are only intended to illustrate the present invention, rather than to limit the scope of the present invention. Unless otherwise specified, the following metal raw materials can be purchased in the market, and the preparation methods and testing methods adopted in the following examples all adopt the existing conventional methods.
[0028] 1. Preparation of materials
[0029] Preparation of doped LiNbO 3 MgH 2 The specific preparation steps of the hydrogen storage material are as follows:
[0030] (1) In a glove box filled with argon gas, weigh LiNbO according to the mass fraction ratio. 3 Powder and MgH 2Powder (particle size less than 25μm, purity greater than 98%). Place the weighed two powders in a 250ml stainless steel ball mill jar in a glove box, and add 8mm, 5mm and 3mm stainless steel grinding balls in a ...
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Abstract
The invention provides a lithium niobate-doped modified Mg-based hydrogen storage material and a preparation method thereof, and relates to the technical field of magnesium-based solid hydrogen storage materials. The preparation method comprises the following steps: carrying out ball milling on MgH2 and lithium niobate in an inert gas or hydrogen atmosphere to obtain an efficient magnesium-based hydrogen storage material; in the hydrogen storage material, the mass fraction of the catalyst is 2-20 wt.%. Compared with a material not doped with a lithium niobate catalyst, the magnesium-based hydrogen storage material obtained after ball milling of lithium niobate and MgH2 has the advantages that the catalyst has excellent catalytic activity, the hydrogen absorption and desorption performance of the magnesium-based hydrogen storage material can be further improved, the hydrogen absorption and desorption temperature is remarkably reduced, and the hydrogen absorption and desorption speed is increased. The magnesium-based hydrogen storage material provided by the invention is simple in preparation process and excellent in hydrogen storage performance, and has an important reference value for industrial development of hydrogen energy storage and transportation.
Description
technical field [0001] The invention belongs to the technical field of magnesium-based hydrogen storage materials, and mainly relates to a lithium niobate doped catalytically modified Mg-based hydrogen storage material and a preparation method thereof. Background technique [0002] With the increase of global fossil energy consumption and the intensification of environmental problems, the development and utilization of new energy sources is an inevitable trend and an inevitable choice for energy development in today's world. Hydrogen energy has many advantages such as abundant resources, cleanness and high efficiency, and is an important part of my country's energy structure. Safe and efficient hydrogen storage and transportation technology is a key issue restricting the development of hydrogen energy. [0003] The existing hydrogen storage methods are mainly faced with the following problems: (1) the storage conditions are harsh, and it is difficult to store at normal temp...
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IPC IPC(8): C01B3/00
CPCC01B3/0078Y02E60/32
Inventor 陈玉安杨修万海毅周世明冉磊房达瑞戴玉娟潘复生
Owner CHONGQING UNIV
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