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Membrane-free direct alcohol fuel cell in acid solution and preparation method thereof

An acidic solution and fuel cell technology, applied in fuel cells, battery electrodes, circuits, etc., can solve the problems that cannot be applied to direct alcohol fuel cells without membranes

Inactive Publication Date: 2014-09-10
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in acidic solution, PtRu / C materials cannot be applied to direct alcohol fuel cells without membranes

Method used

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  • Membrane-free direct alcohol fuel cell in acid solution and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0027] (1) Mix 100 mg multi-walled carbon nanotubes (MWCNTs), 50 mL 10 mmol L -1 Palladium chloride solution, 12mL 10 mmol L -1 Cobalt chloride solution and 14 mL of 10 mmol L -1 Mix the copper chloride solution, then add 290 mg ethylenediaminetetraacetic acid disodium salt, stir the mixture well for 1 hour, then slowly add 50 mmol L -1 Sodium hydroxide solution until the pH of the mixture reaches 6. Continue to stir the mixture, slowly add 50 mL of sodium borohydride solution (30% by mass) dropwise, and continue stirring the mixture for 1 hour after the addition is complete. The mixture was filtered, and the resulting solid was washed with a large amount of water to neutrality, and then vacuum-dried at room temperature for 24 hours to obtain palladium-cobalt-copper nanocomposites (PdCoCu / MWCNT) supported on multi-walled carbon nanotubes (MWCNTs).

[0028] (2) Prepare the gas diffusion electrode, the preparation steps are as follows:

[0029] Step 1: Preparation of the cata...

Embodiment 2

[0042] (1) Mix 150 mg multi-walled carbon nanotubes (MWCNTs), 70 mL 10 mmol L -1 Palladium chloride solution, 18 mL 10 mmol L -1 Cobalt chloride solution and 22 mL of 10 mmol L -1 Mix the copper chloride solution, then add 450 mg ethylenediaminetetraacetic acid disodium salt, stir the mixture well for 1 hour, then slowly add 50 mmol L -1 Sodium hydroxide solution until the pH of the mixture reaches 6. Continue to stir the mixture, slowly add 80 mL of sodium borohydride solution (30% by mass) dropwise, and continue stirring the mixture for 1 hour after the addition is complete. The mixture was filtered, and the resulting solid was washed with a large amount of water to neutrality, and then vacuum-dried at room temperature for 24 hours to obtain palladium-cobalt-copper nanocomposites (PdCoCu / MWCNT) supported on multi-walled carbon nanotubes (MWCNTs).

[0043] (2) Prepare the gas diffusion electrode, the preparation steps are as follows:

[0044] Step 1: Preparation of the cat...

Embodiment 3

[0057] (1) Mix 200 mg multi-walled carbon nanotubes (MWCNTs), 100 mL 10 mmol L -1 Palladium chloride solution, 24mL 10 mmol L -1 Cobalt chloride solution and 28 mL 10 mmol L -1 Mix the copper chloride solution, then add 600 mg ethylenediaminetetraacetic acid disodium salt, stir the mixture well for 1 hour, then slowly add 50 mmol L -1 Sodium hydroxide solution until the pH of the mixture reaches 6. Continue to stir the mixture, slowly add 100 mL of sodium borohydride solution (30% by mass) dropwise, and continue stirring the mixture for 1 hour after the addition is complete. The mixture was filtered, and the resulting solid was washed with a large amount of water to neutrality, and then vacuum-dried at room temperature for 24 hours to obtain palladium-cobalt-copper nanocomposites (PdCoCu / MWCNT) supported on multi-walled carbon nanotubes (MWCNTs).

[0058] (2) Prepare the gas diffusion electrode, the preparation steps are as follows:

[0059] Step 1: Preparation of the catal...

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Abstract

The invention discloses a membrane-free direct alcohol fuel cell in an acid solution and a preparation method of the membrane-free direct alcohol fuel cell. The membrane-free direct alcohol fuel cell comprises a gas diffusion electrode, an anode strip and electrolyte, wherein the gas diffusion electrode is formed by hot pressing a catalyst layer, a stainless steel wire and a water resistible and breathable layer which are sequentially stacked, the water resistible and breathable layer is directly contacted with air, a plastic gridded clapboard is arranged between the gas diffusion electrode and the anode strip, rubber gaskets are arranged between the plastic gridded clapboard and the anode strip as well as between the plastic gridded clapboard and the catalyst layer, the catalyst layer is manufactured by a Pd-Co-Cu nanocomposite supported by a multiwalled carbon nanotube, the anode strip is formed by taking Nafion solution as a binder, and coating the stainless steel wire by Pt / C partials, and the electrolyte is a sulfuric acid solution containing alcohol. The membrane-free direct alcohol fuel cell can stably discharge in the acid solution, an ion exchange membrane is not used, the membrane-free direct alcohol fuel cell is simple in structure, and the cost of the membrane-free direct alcohol fuel cell is greatly reduced.

Description

technical field [0001] The invention belongs to the technical fields of fuel cell technology and new energy materials, and in particular relates to a direct alcohol fuel cell without an ion exchange membrane in an acidic solution and a manufacturing method thereof. Background technique [0002] Direct alcohol fuel cells use methanol, ethanol, propanol (and its isomers) and butanol (and its isomers) as fuel, oxygen (or air) as the oxidant, and achieve continuous output of electrical energy under the action of an electrocatalyst . The anode reaction of this fuel cell is the oxidation reaction of alcohol, and the cathode reaction is the oxygen reduction reaction. To realize the smooth progress of the anode and cathode reactions, catalysts with strong catalytic activity must be used as the anode and cathode. At present, the anode catalyst used in direct alcohol fuel cells is mainly Pt / C, and the cathode catalyst is mainly PtRu / C, and the anode and cathode are separated by an io...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/22H01M4/86H01M4/90
CPCY02E60/50H01M4/88H01M4/9041H01M8/1009Y02P70/50
Inventor 易清风楚浩陈清华阳铮刘小平
Owner HUNAN UNIV OF SCI & TECH
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