Al-BiCl<3>-LiBH<4> aluminum-based composite hydrogen production material and method for manufacturing same

Abstract

The invention discloses an Al-BiCl<3>-LiBH<4> aluminum-based composite hydrogen production material and a method for manufacturing the same. The Al-BiCl<3>-LiBH<4> aluminum-based composite hydrogen production material is made of, by weight, 50-95% of aluminum powder and 5-50% of additives by means of ball-milling. BiCl<3> and LiBH<4> are mixed with each other to obtain the additives. The method includes respectively weighing the required aluminum powder, the required BiCl<3> and the required LiBH<4> according to proportions, adding the aluminum powder, the BiCL<3> and the LiBH<4> into a ball-milling tank, adding grinding balls into the ball-milling tank according to a ball-to-material ratio of 20-120:1, sealing the ball-milling tank and filling the tank with argon for protection; placing the ball-milling tank in a ball-milling machine, and carrying out ball-milling for 1-10 hours at the ball-milling rotational speed of 100-500r / min to obtain the Al-BiCl<3>-LiBH<4> aluminum-based composite hydrogen production material. The Al-BiCl<3>-LiBH<4> aluminum-based composite hydrogen production material and the method have the advantages that as proved by tests, the Al-BiCl<3>-LiBH<4> aluminum-based composite hydrogen production material is excellent in hydrogen production performance and low in cost, processes are simple, and the like.

Description

technical field [0001] The invention belongs to the technical field of hydrogen preparation, in particular to an Al-BiCl 3 -LiBH 4 Aluminum matrix composite hydrogen production material and its preparation method. Background technique [0002] Aluminum-based hydrogen production materials have the advantages of high energy density, easy storage, low raw material cost, easy access to raw materials, environmentally friendly aluminum water reaction products, and recyclable use. They have a wide range of applications in energy storage, peak shifting, and mobile hydrogen production. application prospects. However, during the reaction of aluminum and water, a dense oxide film will be formed on the surface, which hinders the continuous progress of the reaction. Therefore, how to break the oxide film on the surface of aluminum becomes the key to the hydrogen production technology of aluminum water. [0003] Alkaline solution can effectively break the oxide film on the aluminum sur...

AI Technical Summary

Problems solved by technology

However, the material has the following problems: 1. The preparation process is complicated. At present, Li 3 H 6 The production of LiH and LiAlH has not yet been commercialized, and it needs to be mechanically milled for LiH and LiAlH 4 mixture preparation

2. The Al content of the material is less than 80%, the amount of hydride added is large, and the preparation cost is high

3. The reaction between materials and water is prone to combustion

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