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A kind of anode material for biomass alkaline fuel cell and preparation method thereof

A fuel cell and anode material technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of viologen compounds that are harmful to the ecological environment, expensive metal catalysts, complex graphene preparation processes, etc. The effect of improving catalytic reaction efficiency and improving electrochemical performance

Inactive Publication Date: 2019-05-17
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the above-mentioned technical problems such as expensive and easily poisoned noble metal catalysts, complex graphene preparation process, and great harm to the ecological environment of viologen compounds, and provides a cheap, efficient and clean catalyst for biomass alkali An anode material for an alkaline fuel cell and a preparation method thereof. By preparing a graphene-modified nickel foam anode material and immobilizing viologen compounds on the graphene-modified nickel foam composite material, the performance of a biomass alkaline fuel cell is improved

Method used

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  • A kind of anode material for biomass alkaline fuel cell and preparation method thereof
  • A kind of anode material for biomass alkaline fuel cell and preparation method thereof
  • A kind of anode material for biomass alkaline fuel cell and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] (1) Add concentrated nitric acid (analytical pure) to 325 mesh natural flake graphite according to the mass ratio of 1:1, stir to mix the two evenly, after the natural flake graphite is oxidized by concentrated nitric acid for 20 minutes, under the condition of constant stirring Next, add formic acid (analytically pure), make the ratio of formic acid and natural flake graphite be 4:5, and react 40min at room temperature;

[0034] (2) washing and suction-filtering the mixture obtained in (1) until the pH is 5-7, and drying the obtained water-washed product at 70° C. for 5 hours to obtain sulfur-free graphite oxide;

[0035] (3) Take sulfur-free graphite oxide and ultrasonically disperse it in deionized water. After ultrasonic stripping for 4 hours, a dispersion of 1.25 g / l is obtained, which is allowed to stand overnight. The supernatant is centrifuged at 10,000 r / min for 20 minutes to obtain the upper layer The liquid is graphene oxide suspension;

[0036] (4) Take an ...

Embodiment 2

[0044] Comparison of power density curves of biomass alkaline fuel cells corresponding to three different anodes:

[0045] figure 2 Shown are the power density curves of the cells for the three different anodes. Square among the figure represents that battery anode is electrodeposited graphene on the surface of nickel foam (manufacturing steps are the same as (1), (2), (3), (4), (5) steps of Example 1); icon circle represents battery The anode is doped and immobilized methyl viologen on the foamed nickel (the manufacturing step is except that the graphene is not deposited on the foamed nickel, and is (6), (7), (8), (9), (10) of embodiment 1 ) steps are the same); the triangle indicates that the battery anode is the anode obtained by doping and fixing methyl viologen on the graphene-modified nickel foam composite material prepared in Example 1. The hollow icon in the figure indicates the variation trend of voltage, and the corresponding solid icon indicates the variation tre...

Embodiment 3

[0047] Embodiment 3: Comparison of polarization curves of biomass alkaline fuel cells corresponding to three different anodes:

[0048] image 3 Shown are the polarization curves of the cells corresponding to three different anodes. In the figure, the block represents that the battery anode is electrodeposited graphene on the surface of nickel foam (the production steps are the same as (1), (2), (3), (4), and (5) steps of Example 1); the icon circle represents the battery anode For doping and immobilization methyl viologen on the foamed nickel (manufacturing steps do not deposit graphene except on the foamed nickel, and be (6), (7), (8), (9), (10) steps of example 1 The same); the triangle indicates that the battery anode is the anode obtained by doping and fixing methyl viologen on the graphene-modified nickel foam composite material prepared in Example 1. The battery used is a single-chamber glucose fuel cell, the concentration of glucose in the battery is 1M, and the conc...

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Abstract

The invention belongs to the technical field of fuel cells and discloses an anode material for a biomass alkaline fuel cell and a preparation method thereof. A carbon thin layer coated with methyl viologen is fixed on a graphene modified nickel foam composite material through single-sided rolling. The preparation method comprises the following steps: preparing graphene oxide suspension by utilizing an oxidation-reduction method; repeatedly depositing graphene on both sides of the nickel foam by taking the graphene oxide suspension as electrolyte, taking nickel foam as a working electrode and taking a platinum electrode as a counter electrode, thereby obtaining a graphene modified nickel foam composite material; tiling the prepared carbon thin layer coated with methyl viologen on one side of the graphene modified nickel foam composite material, and performing roll-in fixation on the composite material until a specific thickness is reached. According to the invention, the graphene modified nickel foam anode material is prepared, and a viologen compound is fixed on the graphene modified nickel foam composite material, so that the performance of the biomass alkaline fuel cell is improved, and the preparation process is cheap, high-efficiency and clean.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to an anode material applied to a biomass alkaline fuel cell and a preparation method thereof. Background technique [0002] Biomass alkaline fuel cell is a device that can directly convert the chemical energy stored in biomass fuel and oxidant into electrical energy through the oxidation-reduction reaction of the anode and cathode in an alkaline environment. It has high energy conversion efficiency, With many advantages such as low environmental pollution, long-term continuous power supply, and wide application range, it has increasingly become a hot spot in the field of energy research and has been favored by many researchers. [0003] As the core component of biomass alkaline fuel cells, the anode catalyst plays a very important role in improving the performance and stability of the battery. Common noble metals such as gold and platinum used as catalysts have good...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/86H01M4/90
CPCH01M4/8647H01M4/8825H01M4/8875H01M4/9041Y02E60/50
Inventor 刘宪华赵杨林青霞
Owner TIANJIN UNIV
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