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Alkaline direct dimethyl ether fuel cell

A fuel cell and dimethyl ether technology, applied in fuel cells, solid electrolyte fuel cells, battery electrodes, etc., can solve the problems of poor reaction activity and poor oxygen electrochemical reduction activity, and achieve low production cost and high reaction activity , the effect of a wide range of sources

Inactive Publication Date: 2010-08-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, not only is DME poorly reactive under acidic conditions, but the electrochemical reduction activity of oxygen is also poor.

Method used

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  • Alkaline direct dimethyl ether fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0040] Example 1-1: Preparation of polypyrrole-modified carbon-supported Pt-Ru catalyst

[0041] Disperse 10 grams of carbon black into water to form a suspension, the mass ratio of which is 1:15; add glacial acetic acid to adjust the pH value to 2.5, stir at room temperature for 10 minutes; add pyrrole and stir according to the mass ratio of carbon black to pyrrole of 1:0.05 5min, then add PtCl 2 and RuCl 2 0.6 g each; after stirring at room temperature for 3 h, add 0.05 g of H 2 o 2 ; After stirring for 3 hours at suffocation temperature, heat to 70°C; slowly add 300ml to a concentration of 0.1M L -1 After the reductant alkaline sodium borohydride solution, stirred vigorously for 30min, and cooled naturally; after washing and filtering with deionized water, vacuum drying at 70°C for 6h, and heat treatment at 300°C for 5h under an Ar inert atmosphere to obtain polypyrrole-modified carbon The Pt-Ru catalyst is supported, and the mass ratio of the Pt-Ru catalyst to the poly...

Embodiment 1-2

[0042] Example 1-2: Preparation of polypyrrole-modified carbon-supported Pt-Ru catalyst

[0043] Disperse 10 grams of carbon black into methanol to form a suspension, the mass ratio of which is 1:15; add hydrochloric acid to adjust the pH value to 3, stir at room temperature for 30 minutes; add pyrrole and stir according to the mass ratio of carbon black to pyrrole of 1:0.3 10min, then add PtCl 2 and RuCl 2 0.6 g each; after stirring at room temperature for 10 h, add 0.1 g of H 2 o 2 ; After stirring at room temperature for 10 hours, heat to 90°C; slowly add 300ml to a concentration of 0.1M L -1 The reductant alkaline sodium borohydride solution, stirred vigorously for 60min, and cooled naturally; after washing and filtering with deionized water, vacuum drying at 90°C for 12h, and then drying in N 2 Heat treatment at 600°C for 1 h under atmosphere to prepare polypyrrole-modified carbon-supported Pt-Ru catalyst, the mass ratio of Pt-Ru catalyst to polypyrrole-modified carbo...

Embodiment 1-3

[0044] Example 1-3: Preparation of polypyrrole-modified carbon-supported Pt-Ru catalyst

[0045] Disperse 10 grams of carbon black into methanol to form a suspension, the mass ratio of which is 1:15; add hydrochloric acid to adjust the pH value to 2.8, stir at room temperature for 20 minutes; add pyrrole and stir according to the mass ratio of carbon black to pyrrole of 1:0.2 20min, then add PtCl 2 and RuCl 2 0.6 g each; after stirring at room temperature for 6 h, add 0.08 g of H 2 o 2 ; After stirring at room temperature for 6 hours, heat to 80°C; slowly add 300ml to a concentration of 0.1M L -1 After the reductant alkaline sodium borohydride solution, stir vigorously for 50min, and cool naturally; wash and filter with deionized water, dry at 80°C for 9h in vacuum, and then store in N 2 Heat treatment at 500°C for 3 h under atmosphere to prepare polypyrrole-modified carbon-supported Pt-Ru catalyst, the mass ratio of Pt-Ru catalyst to polypyrrole-modified carbon support is...

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Abstract

The invention relates to an alkaline fuel cell, which aims to provide an alkaline direct dimethyl ether fuel cell. A cation exchange membrane or an anion exchange membrane is used as a membrane of the fuel cell for partitioning an anode and a cathode, an alkaline dimethyl ether solution contained in an anode catalyst carrier is used as an electrolyte, and the alkaline dimethyl ether solution is an aqueous solution in which dimethyl ether is saturated and the concentration of NaOH or KOH is 1-6 mol / L. In the invention, the dimethyl ether dissolved in lye is used as fuel, which can greatly improve the power generation performance of the direct dimethyl ether fuel cell. The alkaline direct dimethyl ether fuel cell can be applied to portable and mobile power supplies in large-scale commercial applications. An anode catalyst is beneficial to exerting the performance of a cocatalyst on improving the Co poisoning resisting performance of Pt, thereby improving the activity of the catalyst and improving the power generation performance of the dimethyl ether fuel cell. Likewise, the activity of a cathode catalyst can be improved, and the oxygen reduction reaction kinetics can be improved, thereby improving the power generation performance of the dimethyl ether fuel cell.

Description

technical field [0001] The invention relates to an alkaline fuel cell working at low temperature, more specifically, the invention relates to a fuel cell directly using an alkaline solution dissolved with dimethyl ether as fuel and an ion exchange membrane as electrolyte. Background technique [0002] Proton exchange membrane fuel cells (PEMFC) are considered to be one of the most promising technologies in the field of mobile and portable power sources. Although PEMFC technology has become increasingly mature, its commercialization still faces a difficult problem, that is, the production, storage and transportation of hydrogen. There are two main methods of hydrogen storage and transportation: first, hydrogen storage in high-pressure gas cylinders, the disadvantages are low volume specific energy, high requirements for equipment, and certain safety hazards; second, using reformed gas to feed fuel cells , which will inevitably complicate the fuel cell system and increase the...

Claims

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Application Information

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IPC IPC(8): H01M8/10H01M4/88H01M4/90B01J31/28B01J31/26H01M8/1009
CPCY02E60/522Y02E60/50
Inventor 李洲鹏刘宾虹徐衎
Owner ZHEJIANG UNIV
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