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Direct sodium borohydride fuel cell using ferrocene as cathode catalyst

A cathode catalyst, fuel cell technology, applied in fuel cells, battery electrodes, circuits, etc., can solve the problems of poor catalyst performance and less research, achieve high electromotive force and energy density, facilitate popularization, and solve the effect of lack of platinum resources

Inactive Publication Date: 2009-01-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, research on low-cost catalysts mainly focuses on transition metal atom cluster catalysts, macrocyclic compound catalysts containing transition metals in the center, and metal carbide catalysts; in addition, nitrides, sulfides, borides, and silicides are used as low-temperature fuels. Battery catalysts have also been reported, but the performance of these catalysts is relatively poor, and there are relatively few studies

Method used

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  • Direct sodium borohydride fuel cell using ferrocene as cathode catalyst
  • Direct sodium borohydride fuel cell using ferrocene as cathode catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Use tetrahydrofuran as the solvent to dissolve the ferrocene in the solvent, the mass ratio of the solvent to the ferrocene is 1:0.1, and then add the perfluorosulfonic acid-based resin (Nafion) in the ferrocene solution at the mass ratio of 1:2 The solution is used as a dispersant, and the components of the perfluorosulfonic acid-based resin solution are: Nafion: anhydrous methanol: anhydrous ethanol: water at a ratio of 5:10:5:8 to prepare a ferrocene solution.

[0034] The acetylene black is added to the ferrocene solution, and the mass ratio of the ferrocene solution to the acetylene black is in the range of 1:0.1. After being stirred uniformly by ultrasonic, filtered, washed with distilled water, deionized water or purified water, and dried to obtain a ferrocene-carbon black catalyst.

[0035] The above ferrocene-carbon black catalyst was mixed with Nafion solution and water at a mass ratio of catalyst: Nafion solution: water of 1:5:10, prepared into a slurry, and then...

Embodiment 2

[0037] Example 2: Preparation of ferrocene-cobalt phthalocyanine cathode

[0038] Use cyclohexane as the solvent to dissolve the ferrocene and cobalt phthalocyanine in the solvent. The mass ratio of the solvent to the ferrocene and cobalt phthalocyanine is 1:0.5:0.5, and then press in the ferrocene-cobalt phthalocyanine solution. The mass ratio of 1:4 adds perfluorosulfonic acid-based resin (Nafion) solution as a dispersant. The components of the perfluorosulfonic acid-based resin solution are: Nafion: anhydrous methanol: anhydrous ethanol: water = 10:30:30: 30, thereby preparing a ferrocene-cobalt phthalocyanine solution.

[0039] The acetylene black is added to the ferrocene-cobalt phthalocyanine solution, and the mass ratio of the solution to the carbon black is in the range of 1:5. After being uniformly stirred by ultrasound, it is filtered, washed with distilled water, deionized water or purified water, and dried to obtain a ferrocene-cobalt phthalocyanine-carbon black cataly...

Embodiment 3

[0042] Example 3: Preparation of ferrocene-platinum carbon cathode

[0043] Carbon tetrachloride is used as a solvent to dissolve ferrocene in a solvent, and the mass ratio of the solvent to the ferrocene is 1:2.5 to prepare a ferrocene solution.

[0044] The hydrophobically treated platinum-carbon catalyst (10wt% platinum) is prepared into a slurry with a polytetrafluoroethylene emulsion (10wt%) as a binder at a mass ratio of 1:10, and then applied to the hydrophobically treated After drying on the carbon cloth, calcined in a muffle furnace at 350°C for one hour under a nitrogen atmosphere, and then naturally cooled to room temperature to prepare the cathode matrix. Then it is immersed in the above ferrocene solution and dried to form a hydrophobic ferrocene-platinum carbon cathode.

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Abstract

The invention relates to fuel cell technology, and aims at providing an immediate sodium borohydride fuel cell with ferrocene as a cathode catalyst. The immediate sodium borohydride fuel cell takes alkaline sodium borohydride water solution which contains 10wt% of NaBH4 and 5wt% of NaOH as a fuel, takes air or pure oxygen as an oxidant, and takes perfluorinated sulfonic acid resin as an electrolyte; an anode catalyst is one or a mixture of a plurality of components chosen from noble metal catalysts Pt, Pd, Au and Ag and alloys thereof and non-noble metal catalysts Ni, Fe, Co, Mn, Cr and Ti and alloys thereof, and hydrogen storage material MnNi5-xMx and Zr1-xTixNi2-yNy, wherein, the range of x is 0.01-0.5 and the range of y is 0.01-1.5; the cathode of the fuel cell takes the ferrocene as a cathode catalyst. The immediate sodium borohydride fuel cell has the beneficial effects that: the sodium borohydride has higher hydrogen storage density, the noble metals are not needed as the anode electrode catalysts when an electrochemical oxidation reaction is carried out, and the immediate sodium borohydride fuel cell has higher electromotive force and higher energy density, which can effectively reduce the cost of the fuel cell, solves the problem of lack of platinum resources, and is useful for the popularization of the fuel cell technology.

Description

Technical field [0001] The invention relates to a fuel cell technology, more specifically, to a direct sodium borohydride fuel cell using ferrocene as a cathode catalyst. Background technique [0002] In recent years, due to innovative breakthroughs in fuel cell technology, coupled with multiple pressures such as environmental issues and energy shortages, governments and industries such as automobiles, electricity, and energy have gradually paid attention to the development of fuel cell technology. Fuel cell is a new power generation technology with high efficiency, low pollution and diversified energy. The power generation system of fuel cell is not only cheaper than traditional fossil fuels, but also has the advantages of clean and high efficiency. It can also integrate nuclear energy, biological energy, and solar energy. , Wind energy and other power generation technologies, diversified, renewable and sustainable use of energy. The fuel cell uses alcohol, natural gas, hydrogen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88H01M8/00H01M8/1009
CPCY02E60/50
Inventor 李洲鹏刘宾虹
Owner ZHEJIANG UNIV
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