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A low-cost and high-capacity titanium-manganese-based hydrogen storage alloy

A hydrogen storage alloy and high-capacity technology, applied in the field of hydrogen storage alloy materials, can solve the problems of being unsuitable for large-scale application, effective hydrogen release less than 1.75wt%, and high cost, and achieve low-cost large-scale preparation and low cost , the effect of a wide range of application prospects

Active Publication Date: 2020-09-29
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The typical representative of the rare earth system is LaNi 5 , the maximum hydrogen absorption is only 1.4wt%, Laves phase AB 2 A typical representative of type alloy is TiM 2 , ZrM 2 The maximum hydrogen storage capacity of such alloys is 1.8wt%-2.4wt%T, but the effective hydrogen release capacity is lower than 1.75wt%. Ti-Fe alloy is the representative of AB type alloy, and the maximum hydrogen absorption capacity is 1.8wt% %, the effective hydrogen release amount is 1.7wt%; Mg2Ni is a typical representative of magnesium-based alloys, and the maximum hydrogen absorption amount can reach 3.6wt%, but the service conditions must be above 200 ° C; although vanadium-based solid solution alloys have a large absorption amount of hydrogen, but is expensive and not suitable for large-scale applications

Method used

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  • A low-cost and high-capacity titanium-manganese-based hydrogen storage alloy
  • A low-cost and high-capacity titanium-manganese-based hydrogen storage alloy
  • A low-cost and high-capacity titanium-manganese-based hydrogen storage alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Design alloy composition Ti 0.99 Mo 0.1 mn 1.5 (V 4 Fe) 0.5 Cr 0.0 5Ni 0.05 , the raw material purity used in the present embodiment is Ti≥99.7%, Mo≥99.4%, Mn≥99.8%, Cr≥99.5%, (V 4 Fe)≥99.5%, Ni≥99.95%, V 4 The mass percentage of V in Fe is 76%. Take a 100kg sample and melt it in a vacuum intermediate frequency induction furnace, using high-purity argon as the protective atmosphere. Take 2g of alloy ingot and mechanically crush it to 40-160 mesh, vacuumize at 373K for 1 hour, and conduct hydrogen absorption and desorption test. figure 1 is the hydrogen absorption kinetic curve of the alloy, figure 2 It is the hydrogen absorption and desorption PCT curve of the alloy. It can be seen that the saturated hydrogen absorption capacity of the alloy is 2.02wt% at 4MPa at 298K, and the effective hydrogen storage capacity is 0.1MPa at 343K after saturated hydrogen absorption under the above conditions. It is 1.813wt%.

Embodiment 2

[0024] Design alloy composition Ti 0.9 Zr 0.1 mn 1.5 (V 4 Fe) 0.3 Cr 0.1 co 0.2 , the raw material purity used in the embodiment is Ti≥99.7%, Zr≥99.4%, Mn≥99.8%, Cr≥99.5%, (V 4 Fe)≥99.5%, Co≥99.95%, V 4 The mass percent content of V in Fe is 78%. Take a 100kg sample and melt it in a vacuum intermediate frequency induction furnace, using high-purity argon as the protective atmosphere. Take 2g of alloy ingot and mechanically crush it to 40-160 mesh, vacuumize at 373K for 1 hour, and conduct hydrogen absorption and desorption test. image 3 is the hydrogen absorption kinetic curve of the alloy, Figure 4It is the hydrogen absorption and desorption PCT curve of the alloy. It can be seen that the saturated hydrogen absorption capacity of the alloy is 2.01wt% at 4MPa at 298K, and the effective hydrogen storage capacity is 0.1MPa at 343K after saturated hydrogen absorption under the above conditions. It is 1.806wt%.

Embodiment 3

[0026] Design alloy composition Ti 0.95 Nb 0.1 mn 1.5 (V4Fe) 0.3 Cr 0.2 Cu 0.1 , the raw material purity used in the embodiment is Ti≥99.7%, Nb≥99.7%, Mn≥99.8%, Cr≥99.5%, (V 4 Fe)≥99.5%, Cu≥99.5%, V 4 The mass percent content of V in Fe is 80%. Take a 100kg sample and melt it in a vacuum intermediate frequency induction furnace, using high-purity argon as the protective atmosphere. Take 2g of alloy ingot and mechanically crush it to 40-160 mesh, vacuumize at 373K for 1 hour, and conduct hydrogen absorption and desorption test. Figure 5 is the hydrogen absorption kinetic curve of the alloy, Figure 6 It is the hydrogen absorption and desorption PCT curve of the alloy. It can be seen that the saturated hydrogen absorption capacity of the alloy is 2.04wt% at 4MPa at 298K, and the effective hydrogen storage capacity is 0.1MPa at 343K after saturated hydrogen absorption under the above conditions. It is 1.823wt%.

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Abstract

The invention discloses a titanium manganese based hydrogen storage alloy with low cost and high capacity. The chemical composition of the alloy is Ti(M1)Mn<c>(V4Fe)<d>Cr<e>(M2)<f>, wherein 0.9<a<=1.0, 0<b<=0.1, 0.9<(a+b)<=1.1, 1.0<c<=1.5, 0.3<d<=0.5, 0<e<=0.1, 0<f<=0.5, and 1.8<(c+d+e+f)<=2.1; M1 is any one or more combinations of Zr, Nb and Mo; and M2 is any one or more combinations of Cu,Ni and Co. The hydrogen storage alloy can be smelted by a vacuum medium frequency induction furnace, the smelted alloy can absorb hydrogen directly, the activation performance is good, meanwhile, theeffective hydrogen storage capacity of the alloy is high, a hydrogen absorption and discharge platform of the alloy is flat, the slope and lag of the platform are small, and the cost is low. The titanium manganese based hydrogen storage alloy with the low cost and the high capacity is especially suitable for large-scale preparation and has practical value, and has the wide application prospects in the aspects such as large-scale storage and transportation of fuel cell hydrogen sources and hydrogen.

Description

technical field [0001] The invention relates to a low-cost and high-capacity titanium-manganese-based hydrogen storage alloy, which belongs to the technical field of hydrogen storage alloy materials. Background technique [0002] With the development of human society and the advancement of science and technology, traditional fossil energy sources such as coal, oil, and natural gas are increasingly exhausted, and the deterioration of the ecological environment caused by fossil energy sources is also becoming more and more serious. This has aroused people's attention to new energy. Hydrogen is one of the important new energy sources at present. The cheap production, storage, transportation and application of hydrogen are the key research topics today. Due to the characteristics of easy gasification, flammability and explosion of hydrogen, how to properly solve the problem of hydrogen storage and transportation Become the key to the development and application of hydrogen ener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C30/02C22C1/02
CPCC22C1/02C22C30/00C22C30/02
Inventor 袁宝龙叶建华李志念蒋利军王树茂郭秀梅武媛方卢淼邱昊辰
Owner GRIMAT ENG INST CO LTD