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Maskless direct alcohol fuel cell and preparation method thereof

A fuel cell and manufacturing method technology, which can be used in fuel cells, solid electrolyte fuel cells, battery electrodes, etc., and can solve the problem of high cost of ion membranes

Inactive Publication Date: 2013-02-06
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Due to the high cost of ionic membranes in direct alcohol fuel cells, people have conducted in-depth research on how to prepare ionic membranes with good stability, excellent performance and low cost. Although there has been some progress, there are still many defects when using ionic membranes. , cannot fundamentally solve the problem

Method used

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  • Maskless direct alcohol fuel cell and preparation method thereof
  • Maskless direct alcohol fuel cell and preparation method thereof
  • Maskless direct alcohol fuel cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Mix 0.1 g of multi-walled carbon nanotubes (MWCNTs) with 3 mmol L -1 PdCl 2 Solution 120 mL and 4 mmol·L -1 NiCl 2 After 20 mL of the solution was mixed, 50 mL of water was added to it, ultrasonicated for 30 min, and then stirred for 1 h. Then, under stirring, use 1mol·L -1 Adjust the pH value of the suspension to 8 with NaOH, and slowly add 3 mL of NaBH 4 (Percentage 50%) solution, continue stirring for 1 h after ultrasonication for 20 min. Washing with water twice and drying at 60 °C to obtain MWCNT-supported PdNi nano-catalyst particles (PdNi / MWCNT);

[0043] (2) 0.25 mmol silver nitrate and 0.3 mmol Co(NO 3 ) 2 ·6H 2 O was dissolved in 100ml of absolute ethanol, 77mg of treated carbon nanotubes were added, ultrasonicated for half an hour, and named as solution A. At the same time, weigh 2g of NaOH and dissolve it in 50ml of absolute ethanol, this is solution B. Slowly pour liquid B into liquid A under stirring, and it is found that flocculent subst...

Embodiment 2

[0054] (1) Mix 0.15 g of multi-walled carbon nanotubes (MWCNTs) with 6 mmol L -1 PdCl 2 Solution 120mL and 10 mmol·L -1 NiCl 2 After 20 mL of the solution was mixed, 50 mL of water was added to it, ultrasonicated for 30 min and then stirred for 3 h. Then, under stirring, use 2mol·L -1 Adjust the pH value of the suspension to 8 with NaOH, slowly drop 5mLNaBH 4 (Percentage 50%) solution, continue stirring for 1 h after ultrasonication for 20 min. Washing with water twice and drying at 60 °C to obtain MWCNT-supported PdNi nano-catalyst particles (PdNi / MWCNT);

[0055] (2) 0.45 mmol silver nitrate and 0.5 mmol Co(NO 3 ) 2 ·6H 2 O was dissolved in 100ml of absolute ethanol, 77mg of treated carbon nanotubes were added, ultrasonicated for half an hour, and named as solution A. At the same time, weigh 2g of NaOH and dissolve it in 50ml of absolute ethanol, this is solution B. Slowly pour liquid B into liquid A under stirring, and it is found that flocculent substances are...

Embodiment 3

[0066] (1) Mix 0.30 g of multi-walled carbon nanotubes (MWCNTs) with 10 mmol L -1 PdCl 2 Solution 120mL and 15 mmol·L -1 NiCl 2 After 20 mL of the solution was mixed, 50 mL of water was added to it, ultrasonicated for 30 min, and then stirred for 5 h. Then, under stirring, use 3mol·L -1 Adjust the pH value of the suspension to 8 with NaOH, and slowly add 7 mL of NaBH 4 (Percentage 50%) solution, continue stirring for 1 h after ultrasonication for 20 min. Washing with water twice and drying at 60 °C to obtain MWCNT-supported PdNi nano-catalyst particles (PdNi / MWCNT);

[0067] (2) 0.65 mmol silver nitrate and 0.7 mmol Co(NO 3 ) 2 ·6H 2 O was dissolved in 100ml of absolute ethanol, 77mg of treated carbon nanotubes were added, ultrasonicated for half an hour, and named as solution A. At the same time, weigh 2g of NaOH and dissolve it in 50ml of absolute ethanol, this is solution B. Slowly pour liquid B into liquid A under stirring, and it is found that flocculent subs...

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Abstract

The invention discloses a maskless direct alcohol fuel cell and a preparation method thereof. The main content disclosed by the invention comprises the steps of (1) firstly, restoring palladium chloride and nickel chloride by sodium borohydride reductant by adjusting the pH value of mixed solution of the palladium chloride, the nickel chloride and a multi-wall carbon nano tube, preparing PdNi nano-catalyst particles (PdNi / MWCNT) loaded by the multi-wall carbon nano tube; (2) taking ethanol as a solvent, preparing AgCo catalyst particles (AgCo / MWCNT) loaded by the multi-wall carbon nano tube by a hydrothermal method; (3) preparing an anode sheet from the PdNi / MWCNT particles, and preparing the gas diffusion electrode from the AgCo / MWCNT particles, and (4) forming the maskless direct alcohol fuel cell by the anode and the gas diffusion electrode, wherein the electrolyte is sodium hydroxide solution containing alcohol. The maskless direct alcohol fuel cell disclosed by the invention adopts non-platinum metal (palladium-nickel or silver-cobalt) as an electrode material, and is strong in electrocatalytic activity, and stable in performance; the ion exchange membrane is not used, and the battery cost is greatly reduced.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a direct alcohol fuel cell without an ion exchange membrane, and also relates to a manufacturing method of a direct alcohol fuel cell without an ion exchange membrane. Background technique [0002] A direct alcohol fuel cell (DAFC) that uses alcohol (including methanol, ethanol, propanol, and butanol) as fuel converts the chemical energy of the fuel (methanol, ethanol, propanol, or butanol) directly into electrical energy. An electrochemical reaction device. For example, when methanol is used as fuel, its electrode reaction in alkaline medium is as follows: [0003] Anode reaction: CH 3 OH+ 6OH - →CO 2 +5H 2 O+6e [0004] Cathode reaction: 3 / 2O 2 +3H 2 O + 6e→6OH - [0005] Total reaction: CH 3 OH+3 / 2O 2 →CO 2 +2H 2 o [0006] Different from secondary batteries, as long as the direct alcohol fuel cell maintains a continuous supply of alcohol fuel and oxidant...

Claims

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Application Information

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IPC IPC(8): H01M8/10H01M4/88H01M4/90H01M8/1011
CPCY02E60/521Y02E60/523Y02E60/522Y02E60/50Y02P70/50
Inventor 易清风孙丽枝张玉晖唐梅香楚洁肖兴中
Owner HUNAN UNIV OF SCI & TECH
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