Anode catalyst of direct borohydride fuel cell and preparation method thereof

A borohydride and fuel cell technology, which is applied in battery electrodes, circuits, electrical components, etc., can solve the problems of poor catalytic activity and high price of hydrogen storage alloys

Inactive Publication Date: 2020-11-17
INNER MONGOLIA NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that, for the above-mentioned problems of the prior art, a kind of anode catalyst of direct borohydride fuel cell is provided, and this anode catalyst is La-Mg-Ni system A 2 B 7 type hydrogen storage alloy, not only has direct catalytic ability, but also can absorb (or store) the generated hydrogen, and then release it in the form of electric energy, and improve fuel utilization through dual functions, aiming to solve the problem of noble metals used as anodes in the prior art. The price of the catalyst is high, and the technical problem of the poor catalytic activity of ordinary hydrogen storage alloys

Method used

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  • Anode catalyst of direct borohydride fuel cell and preparation method thereof
  • Anode catalyst of direct borohydride fuel cell and preparation method thereof
  • Anode catalyst of direct borohydride fuel cell and preparation method thereof

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Embodiment Construction

[0025] Reaction Mechanism of Hydrogen Storage Alloy as DBFC Anode Catalyst

[0026] like figure 1 Shown, BH 4 - During oxidation, BH 4 - The hydrogen is oxidized from negative valence to positive valence in two processes: first, BH 4 - The B-H bond is broken, and the negative one-valent hydrogen is oxidized to zero to generate surface-adsorbed hydrogen atoms H ads (Process 1), and then the surface adsorbs hydrogen atoms H ads Continue to be oxidized to positive monovalent (process 2), namely BH 4 - Direct oxidation process, corresponding to the reaction equation (Process 5)

[0027] BH 4 - +xOH - →BO 2 - +(x-2)H 2 O+(4-x)H 2 +xe - (process 5)

[0028] In the formula, x represents each BH in the actual reaction process 4 - The number of electrons released.

[0029] Second, the surface adsorbed hydrogen atoms H ads It is also possible to combine into H 2 Escape (process 3), this is BH4 - The side reaction (hydrolysis reaction) of the oxidation process co...

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Abstract

The invention relates to an anode catalyst of a direct borohydride fuel cell, a preparation method of the anode catalyst, the direct borohydride fuel cell and the anode catalyst of the direct borohydride fuel cell, the anode catalyst of the direct borohydride fuel cell is LaMgNi series A2B7 type hydrogen storage alloy, the molecular formula of the hydrogen storage alloy is (Mm<1-x>Mgx)Ni2.485Co0.525Mn0.28Al0.21, wherein x=0.1-0.5, and Mm is misch metal which is composed of, by weight, 63.1%of La, 26.0% of Ce, 2.7% of Pr and 8.2% of Nd. The anode catalyst is a La-Mg-Ni series A2B7 type hydrogenstorage alloy, which not only has direct catalytic capability, but also can adsorb (or store) generated hydrogen and release the hydrogen in an electric energy form; the fuel utilization rate is improved through dual action, and the problems that in the prior art, precious metal serving as the anode catalyst is high in price and high in cost performance are solved; and a common hydrogen storage alloy is poor in catalytic activity.

Description

technical field [0001] The present invention relates to the field of fuel cells, in particular to an anode catalyst for a direct borohydride fuel cell, a preparation method thereof, and a direct borohydride fuel cell. Background technique [0002] The limited consumption of fossil energy causes serious environmental pollution. Research on clean new energy and new energy technology that can replace fossil energy is an urgent issue to be solved by all mankind. As a clean energy with abundant reserves, wide sources and high energy density, hydrogen energy has attracted much attention. Due to the advantages of high energy conversion efficiency, high energy density, low environmental pollution, low noise, reliable performance and long service life, fuel cells have become a new energy technology that people are actively researching and developing. Direct borohydride fuel cell (Direct Borohydride Fuel Cell, DBFC) is a kind of energy storage in borohydride BH 4 - A new type of f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90C22C19/03
CPCC22C19/03H01M4/9041Y02E60/50
Inventor 田晓刘昕瑀杨艳春
Owner INNER MONGOLIA NORMAL UNIVERSITY
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