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A carbohydrate alkaline fuel cell anode and its manufacturing method

A carbohydrate and fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as ecological environmental hazards, and achieve the effects of improving electrochemical performance, realizing reuse, and reducing ecological environmental risks.

Inactive Publication Date: 2016-09-14
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, viologen compounds are toxic and harmful to the ecological environment. Therefore, if they are fixed on the metal nickel anode, not only the concentration of local viologen compounds can be increased to improve the catalytic reaction efficiency, but also the viologen compounds can be realized. Reuse of fuel cells to achieve the purpose of improving the performance of fuel cell anodes, saving costs, and eliminating ecological and environmental pollution

Method used

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  • A carbohydrate alkaline fuel cell anode and its manufacturing method
  • A carbohydrate alkaline fuel cell anode and its manufacturing method
  • A carbohydrate alkaline fuel cell anode and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: a kind of preparation method of alkaline fuel cell anode as above, concrete steps are as follows:

[0022] 1) Weigh three 2.0g portions of porous carbon powder and place them in three different clean beakers respectively, and mark them as No. 1, No. 2, and No. 3 in turn. Then add 30mM methyl viologen (MV) solution 2.0g to No. 1 beaker, add 30mM methyl viologen (MV) solution 4.0g in No. 2 beaker, add 30mM methyl viologen (MV) solution to No. 3 beaker ( MV) solution 6.0g, make the mass ratio of porous carbon and methyl viologen solution in No. 1, No. 2, No. 3 beakers be 1:1, 1:2 and 1:3 respectively;

[0023] 2) Add absolute ethanol to the above-mentioned No. 1, 2, and 3 beakers containing the porous carbon and methyl viologen solution until the mixture of the porous carbon powder and the methyl viologen solution is submerged by the absolute ethanol and is higher than The height of the mixture of porous carbon powder and base viologen solution is 1-2 cm, th...

Embodiment 2

[0030] Example 2: Power density curves corresponding to different anodes

[0031] figure 2 Shown are the power density curves of the cells for the three different anodes. The squares in the figure indicate that the anode of the battery is covered with a 2mm thick porous carbon film on the surface of the nickel mesh (the production steps are the same as steps 1), 2), 3) and 4) except that methyl viologen is not added); the icon circle indicates that the battery The anode is a nickel mesh, and 15 mM methyl viologen is added to the battery solution; the triangle indicates that the battery anode is the porous carbon prepared in Example 1 and the mass ratio of methyl viologen solution is 1:1, and methyl viologen is fixed on Anodes prepared from nickel mesh. The solid icon in the figure indicates the variation trend of voltage, and the corresponding hollow icon indicates the variation trend of current density and power density. The battery used is a double-chamber glucose fuel c...

Embodiment 3

[0032] Example 3: Polarization curves of batteries corresponding to different anodes

[0033] image 3Shown are the polarization curves corresponding to different anode batteries, and the squares in the illustration indicate that the anode of the battery is covered with a 2mm thick porous carbon film on the surface of the nickel mesh (the production steps are 1), 2), except for the addition of methyl viologen. 3), 4) the steps are the same); the illustrated circle indicates that the battery anode is a nickel mesh, and 15 mM methyl viologen is added in the battery solution; the triangle indicates that the battery anode is a mixture of the porous carbon prepared in Example 1 and the methyl viologen solution An anode prepared by immobilizing methyl viologen on a nickel mesh with a mass ratio of 1:1. Their open circuit voltages are 0.2272V, 0.7435V and 0.7718V, respectively. The polarization curve of the battery can indicate the quality of the battery. The smaller the slope of t...

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Abstract

The invention relates to a carbohydrate alkaline fuel cell anode and a manufacturing method of the carbohydrate alkaline fuel cell anode. The anode is prepared by combination of the catalytic effect on carbohydrate caused by a viologen compound and a nickel mesh in an alkaline medium, so that the viologen compound is fixed on the nickel mesh, thereby not only improving the catalytic activity of the nickel mesh, but also eliminating the environmental pollution caused by the viologen compound. The anode sequentially consists of two thin films, namely a metal nickel layer and a porous carbon layer from an air side to an electrolyte side. According to the preparation process, methyl viologen is fixed on the nickel mesh by virtue of a microenvironment created by polar porous carbon and non-polar polytetrafluoroethylene, so that methyl viologen is repeatedly used, and the ecological environment risk brought by methyl viologen is greatly lowered. According to the compound electrode structure, the nickel mesh and an electrolyte solution are contacted, so that the catalytic active site of liquid and solid phase boundaries is increased; the catalytic effects of the metal nickel, the porous carbon and the methyl viologen on oxidizing reaction of carbohydrate are combined, so that the electrochemical property of a carbohydrate cell is improved.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to a method for doping and immobilizing a viologen compound on a metal nickel mesh for preparing an anode of an alkaline fuel cell. Background technique [0002] The carbohydrate alkaline fuel cell is an electrochemical reaction device that directly converts the chemical energy in carbohydrates into electrical energy in an alkaline medium. And the power device that can work continuously, so it is generally paid attention to by countries all over the world, and is considered to be the most promising high-efficiency and clean power generation technology in the 21st century. [0003] As the core component of alkaline fuel cells, the anode catalyst plays a very important role in improving the performance and stability of the battery. The first condition for selecting an anode catalyst for an alkaline fuel cell is that it has good catalytic activity, and the second is that the material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/90H01M4/88
CPCH01M4/86H01M4/8647H01M4/88H01M4/90Y02E60/50
Inventor 刘宪华杨玉楼
Owner TIANJIN UNIV
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