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AB3.5 type hydrogen-storing negative pole material and its prepn process and use

An AB3.5, hydrogen storage material technology, applied in chemical instruments and methods, battery electrodes, other chemical processes, etc., can solve the problems of Mg volatilization, difficult to realize industrialization, complex preparation process, etc., and improve the charge and discharge capacity. Effect

Inactive Publication Date: 2007-06-06
北京宏福源科技有限公司
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Problems solved by technology

[0006] Although the above two methods have successfully synthesized the negative electrode hydrogen storage materials used in high-performance metal hydride-nickel batteries, it is difficult to realize industrialization because Mg is volatile during the synthesis process, the composition control is difficult, and the preparation process is complicated.

Method used

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  • AB3.5 type hydrogen-storing negative pole material and its prepn process and use

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Hydrogen storage alloys 1-7 were prepared according to the first batching method. In order to compensate for the volatilization of Mg, the excess of Mg was 20%. The experimental conditions were: argon pressure 1.5atm, homogenization treatment temperature 1020°C, and heat preservation for 6 hours.

Embodiment 2

[0051] Hydrogen storage alloys 1-7 were prepared according to the second batching method. In order to compensate for the volatilization of Mg, the excess of Mg was 20%. The experimental conditions were: argon pressure 1.5atm, homogenization treatment temperature 1020°C, and heat preservation for 6 hours.

Embodiment 3

[0053] Hydrogen storage alloys 1-7 were prepared according to the third batching method. In order to compensate for the volatilization of Mg, the excess of Mg was 20%. The experimental conditions were: argon pressure 1.5atm, homogenization treatment temperature 1020°C, and heat preservation for 6 hours.

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Abstract

The process of preparing AB3.5 type hydrogen-storing negative pole material includes: setting the material inside crucible in a vacuum inducing furnace, vacuuming before introducing Ar in the pressure of 0.2-3 atm, smelting and casting. There is one pipe with one end stretched over the crucible inside the furnace and the other end connected to the vacuum pump outside the furnace, and one valve connected to the pipe outside the furnace to control vacuuming rate, so that the Mg vapor may be pumped out from the furnace. The cast ingot is homogenizing treated in a vacuum heat treating furnace at 850-1020 deg.c for 6-15 hr before being cooled inside the furnace to room temperature. The AB3.5 type hydrogen-storing negative pole material is used in metal hydride-nickel cell.

Description

technical field [0001] The present invention relates to a kind of AB that can be prepared industrially 3.5 The method of type negative electrode hydrogen storage material also relates to the AB prepared by this method 3.5 Type battery negative electrode hydrogen storage material, and its use in the preparation of high-capacity metal hydride-nickel battery negative electrode. technical background [0002] Since the metal hydride-nickel battery was put into the market in the 1990s, due to its high capacity, long life, no memory effect, and no environmental pollution, it has been widely welcomed, and its market share is increasing. The types of batteries are also increasing. From AA and AAA ordinary batteries to other types, the products are widely used in electric tools, household appliances, computers, aerospace, communications and mopeds, etc., and the development is very rapid. With the increase in the application fields of metal hydride-nickel batteries, the requirements...

Claims

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Application Information

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IPC IPC(8): C22C19/00C22C1/02B01J20/02C01B6/24H01M4/86H01M4/88
CPCY02E60/50
Inventor 刘华福田冰
Owner 北京宏福源科技有限公司
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