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Ordered laminar magnesium-based alloy hydrogen storage material for fuel cell and preparation method

A technology of magnesium-based alloys and hydrogen storage materials, applied in the field of hydrogen storage materials, can solve the problems such as the need to further improve the hydrogen storage performance of magnesium-based hydrogen storage alloys, the difficulty of fully exposing the active center, affecting the electrochemical performance, etc., and achieve excellent hydrogen adsorption. and desorption capacity, overcome the poor performance of hydrogen absorption and desorption, and improve the effect of hydrogen absorption and desorption capacity

Inactive Publication Date: 2018-11-16
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention uses highly active mixed rare earth and nickel elements to configure, which increases the adsorption active center to a certain extent. However, it is difficult to fully expose the active center after smelting and alloying, and the hydrogen storage performance of magnesium-based hydrogen storage alloys needs to be further improved.
[0006] In summary, the hydrogen content of magnesium-based hydrogen storage alloys is relatively high, but their hydrogen absorption and desorption capabilities are poor. Traditionally, alloy materials are made by adjusting the composition content, which can improve the performance of magnesium-based alloys, but its structure is usually Disorder, the contact point of the alloy is difficult to be fully exposed as the hydrogen ion adsorption active center, thus affecting its electrochemical performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033](1) Weigh the carbazole organic phase, transition metal nickel nitrate and binder glucose at a molar ratio of 1:0.6:0.3;

[0034] (2) Mix the organic phase with the transition metal salt, then add an appropriate amount of deionized water, control the concentration of the transition metal salt to 0.9mol / L, add the binder at the same time, stir evenly, and after standing for 5 hours, a network structure is obtained. glue material;

[0035] (3) Using the network-structured gel material as the substrate, under the protection of inert gas helium, spray high-temperature magnesium steam at 1100°C evenly on both sides of the substrate, set the nozzle pressure at 0.1MPa, and keep it warm for 3 hours. The network gel material is carbonized to obtain a network amorphous carbon material;

[0036] (4) Put the above-mentioned reticular amorphous carbon material into a vacuum box furnace for annealing for 1-5 hours, the temperature of vacuum annealing is 500°C, and the annealing time ...

Embodiment 2

[0040] (1) Weigh vinyl carbazole, transition metal vanadium chloride and binder cyclodextrin at a molar ratio of 1:1.2:0.3;

[0041] (2) Mix the organic phase with the transition metal salt, then add an appropriate amount of deionized water, control the concentration of the transition metal salt to 0.8mol / L, add the binder at the same time, stir evenly, and after standing for 4 hours, a network structure is obtained. glue material;

[0042] (3) Using the network-structured gel material as the substrate, under the protection of inert gas helium, spray high-temperature magnesium steam at 1100°C evenly on both sides of the substrate, set the nozzle pressure at 0.7MPa, and keep it warm for 3 hours. The network gel material is carbonized to obtain a network amorphous carbon material;

[0043] (4) Put the above-mentioned reticular amorphous carbon material into a vacuum box furnace for annealing for 1 hour. The temperature of the vacuum annealing is 500°C, and the annealing time is...

Embodiment 3

[0047] (1) Weigh acridine, nickel sulfate and binder mannose according to the molar ratio of 1:1.1:0.23;

[0048] (2) Mix the organic phase with the transition metal salt, then add an appropriate amount of deionized water, control the concentration of the transition metal salt to 1.0mol / L, add the binder at the same time, stir evenly, and after standing for 2-5 hours, a network structure is obtained gel material;

[0049] (3) Using the gel material with network structure as the substrate, under the protection of inert gas argon, spray high-temperature magnesium steam at 1100°C evenly on both sides of the substrate, set the nozzle pressure to 0.1MPa, and keep it warm for 3 hours. The network gel material is carbonized to obtain a network amorphous carbon material;

[0050] (4) Put the above-mentioned reticular amorphous carbon material into a vacuum box furnace for annealing for 5 hours. The temperature of vacuum annealing is 430°C, and the annealing time is 30 minutes. After...

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Abstract

The invention provides an ordered laminar magnesium-based alloy hydrogen storage material for a fuel cell and a preparation method. The preparation method comprises the following steps: after mixing transition metal salt and an organic phase, adding a mixture into de-ionized water; meanwhile, adding a binding agent auxiliary agent to form a net-shaped structure gel material; taking the gel material as a substrate and uniformly spraying high-temperature magnesium steam on the substrate under the protection of nitrogen gas; after finishing spraying, carrying out subsequent processing to obtain asheet-shaped magnesium-based alloy hydrogen storage sheet. The magnesium-based alloy hydrogen storage sheet prepared by the invention has a magnesium-transition metal-magnesium composite laminar structure; a metal hydrogenation active site is formed between alloy layers under the synergistic effect of transition metal and magnesium metal, so that hydrogen absorption and hydrogen releasing capabilities of the magnesium metal are effectively improved; the defect of a traditional magnesium-based hydrogen storage material that the hydrogen absorption and hydrogen releasing capabilities are relatively poor is overcome. The magnesium-based alloy hydrogen storage sheet prepared by the preparation method has the advantages of moderate hydrogen absorption and hydrogen releasing conditions, good material stability and simple preparation technology, and is suitable for being used as a hydrogen source in fuel cell automobiles.

Description

technical field [0001] The invention relates to the field of hydrogen storage materials, in particular to an ordered layered magnesium-based alloy hydrogen storage material for fuel cells and a preparation method thereof. Background technique [0002] A fuel cell is a device that converts chemical energy stored in fuel and oxidant into electrical energy. The fuel cell directly converts the chemical energy of the fuel into electrical energy. The energy conversion efficiency is high, the specific energy and specific power are high, and the reaction process can be controlled. The energy conversion process can be carried out continuously, so it is an ideal battery for automobiles. A fuel cell is mainly composed of an anode, an electrolyte and a cathode. The fuel (typically hydrogen) at the anode is oxidized by the catalyst so that the fuel becomes a positively charged ion and negatively transports electrons. Fuel cells only produce water and carbon dioxide during work, especia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88B82Y30/00
CPCB82Y30/00H01M4/8657H01M4/8882Y02E60/50
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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