Graphene-catalyzed hydrogen storage alloy for fuel cells and preparation method thereof
A fuel cell and hydrogen storage alloy technology, applied in the field of hydrogen storage alloy materials, can solve the problems of extremely poor hydrogen absorption and desorption kinetics of alloys
Active Publication Date: 2018-11-20
INNER MONGOLIA UNIV OF SCI & TECH
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Problems solved by technology
However, crystalline rare earth magnesium-based alloys have almost no ability to desorb hydrogen at room temperature, and the hydrogen absorption and desorption kinetics of alloys prepared by conventional melting and casting processes are extremely poor.
Method used
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Effect test
Embodiment 1
[0022] Example 1: Mg 90 Ti 6 V 4 SM 10 La 2 Ni 7 Al 3 +0.1wt.%C(graphene)
Embodiment 2
[0023] Example 2: Mg 90 Ti 6 V 4 SM 10 wxya 7 Al 3 +0.1wt.%C(graphene)
Embodiment 3
[0024] Example 3: Mg 95 Ti 3 V 2 SM 10 wxya 7 Al 3 +0.05wt.%C (graphene)
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The invention relates to a hydrogen storing alloy catalyzed by graphene and used for a fuel cell. The chemical formula of the hydrogen storing alloy is Mg100-x-yTixVySm12-zREzNi10-mAlm + n wt.% graphene, wherein RE is at least one of La, Nd, Y or Gd, x, y, z and m are the atomic ratios, 3<=x<=10, 2<=y<=6, 1<=z<=3, and 2<=m<=5; and n is the mass percentage of graphene to Mg100-x-yTixVySm12-zREzNi10-mAlm, and 0<n<=0.2. According to the hydrogen storing alloy catalyzed by the graphene and used for the fuel cell, multi-component rare earth and a certain amount of titanium, vanadium, nickel and aluminum are added in a rare earth magnesium alloy, and on the premise of guaranteeing that the hydrogen absorbing amount of the alloy is not lowered, the heat stability of the alloy is reduced, and the hydrogen desorbing thermodynamics and kinetics of the alloy is improved.
Description
technical field [0001] The invention belongs to the technical field of hydrogen storage alloy materials, in particular to a graphene-catalyzed hydrogen storage alloy for fuel cells and a preparation method thereof. Background technique [0002] Hydrogen is considered the best fuel in the 21st century and an ideal substitute for fossil fuels. However, the technical challenge to realize the hydrogen economy is the lack of efficient and practical hydrogen storage technology. Among all hydrogen storage methods, metal hydride hydrogen storage is considered to be the most suitable hydrogen carrier for hydrogen fuel cells, but the hydrogen storage capacity of currently commercialized hydrogen storage materials cannot meet the requirements of fuel cells. Magnesium-based alloys are recognized as the most potential hydrogen storage materials due to their high hydrogen storage density and extremely rich resources. Among them, the hydrogen storage capacity of the rare earth magnesium-...
Claims
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IPC IPC(8): C22C23/06C22C1/02B22F9/04H01M4/90
CPCB22F9/04B22F2009/048C22C1/02C22C23/06H01M4/9041Y02E60/50
Inventor 李保卫任慧平赵增武侯忠辉蔡颖冯佃臣张羊换
Owner INNER MONGOLIA UNIV OF SCI & TECH