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Method for improving hydrogen storage alloy anode catalyse performance of borohydride fuel battery directly

A hydrogen storage alloy, borohydride technology, applied in metal/metal oxide/metal hydroxide catalysts, battery electrodes, chemical instruments and methods, etc., can solve the problem of low electrical activity and low anode discharge current of borohydride fuels , hydrogen storage alloy anode catalyst with small specific surface and other problems, to achieve the effect of improving performance

Inactive Publication Date: 2009-06-24
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a hydrogen storage alloy anode catalyst that can overcome the shortcomings of small specific surface area and low electrical activity, solve the problem of small discharge current of borohydride fuel anode and improve the catalytic performance of direct borohydride fuel cell hydrogen storage alloy anode Methods

Method used

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Effect test

specific Embodiment approach 1

[0011] Treatment of AB with NaOH 5 Type hydrogen storage alloy, the volume ratio of alkali to hydrogen storage alloy is 2:1, the concentration of alkali is 6M, and the soaking time is 5h at 80°C. With carbon rod as counter electrode, Ag / AgCl as reference electrode, hydrogen storage alloy as working electrode, in 2M NaOH and 0.10M NaBH 4 In the solution, the scanning speed is 10mV / s, and the current density reaches 65mA / cm under the voltage of -0.6V vs.Ag / AgCl 2 , and NaBH 4 Hydrolysis does not occur.

specific Embodiment approach 2

[0012] AB treated with KOH 5 type hydrogen storage alloy, the volume ratio of alkali to hydrogen storage alloy is 2:1, the concentration of alkali is 6M, NaH 2 PO 4 The concentration is 0.2M, and the soaking time is 5h at 80°C. With carbon rod as counter electrode, Ag / AgCl as reference electrode, hydrogen storage alloy as working electrode, in 2M KOH and 0.10M NaBH 4 In the solution, the scanning speed is 10mV / s, and the current density reaches 70mA / cm under the voltage of -0.6V vs.Ag / AgCl 2 , and NaBH 4 Hydrolysis does not occur.

specific Embodiment approach 3

[0013] Treatment of AB with NaOH and KOH (molar ratio 1:1) 5 type hydrogen storage alloy, the volume ratio of alkali to hydrogen storage alloy is 2:1, the concentration of alkali is 6M, NaH 2 PO 4 The concentration is 0.2M, and the soaking time is 5h at 80°C. With carbon rod as counter electrode, Ag / AgCl as reference electrode, hydrogen storage alloy as working electrode, in 2M NaOH and 0.10M NaBH 4 In the solution, the scanning speed is 10mV / s, and the current density reaches 68mA / cm under the voltage of -0.6V vs.Ag / AgCl 2 , and NaBH 4 Hydrolysis does not occur.

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Abstract

The invention provides a method for improving catalysis performance of hydrogen storage alloy anode of direct hydroboron fuel batteries; according to the volume ratio of alkali and hydrogen storage alloy with 2:1, the hydrogen storage alloy is soaked in alkali liquid with 80 DEG.C for five hours, the alkali density is 5-8M. The invention proposes a method for improving catalysis performance of hydrogen storage alloy anode of direct hydroboron fuel batteries with alkali treatment; the alkali treatment overcomes the disadvantages that the existing hydrogen storage alloy anode catalyst has small specific surface, low electrical activity and the like and solves the problem that the discharge current of the hydroboron fuel batteries is small. The method is characterized in that: before being used, the hydrogen storage alloy is treated by the alkali, thus increasing the catalysis performance of the hydrogen storage alloy to the hydroboron. In the essence of the invention, on the basis of anode catalyst of the hydrogen storage alloy of the direct hydroboron fuel batteries, the electrochemical catalysis performance of the hydrogen storage alloy to the hydroboron is increased by the alkali treatment to the hydrogen storage alloy in advance, and the discharge performance of the hydroboron anode is improved.

Description

(1) Technical field [0001] The invention relates to a method for improving the performance of a direct borohydride fuel cell hydrogen storage alloy anode, in particular to a method for improving the catalytic performance of a direct borohydride fuel cell hydrogen storage alloy anode by alkali treatment. (2) Background technology [0002] Direct borohydride fuel cell (DBFC) is a fuel cell with borohydride as the anode, NaBH 4 It is a hydrogen storage material with a high hydrogen content (11wt.%). In theory, NaBH 4 The direct electrooxidation can be 8e - reaction, with high energy density (9300Wh / kg specific energy), specific capacity (5668Ah / kg) and battery voltage (the cathode is O 2 at 1.64V); NaBH 4 Non-flammable, low toxicity (not harmful unless swallowed), does not generate CO 2 , theoretically NaBH 4 Non-platinum catalysts can be used; NaBH 4 The solution can act as a heat exchange medium to cool the battery without additional cooling plates; the electroosmotic d...

Claims

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Application Information

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IPC IPC(8): H01M4/88B01J23/02
CPCY02E60/50
Inventor 王贵领曹殿学
Owner HARBIN ENG UNIV
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