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Anode applied to direct hydroboron fuel battery and preparation method of anode

A technology of borohydride and fuel cells, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of small surface area, few reactive sites, and constraints on DBFC performance, so as to improve battery performance, reduce H2 generation, and adapt to Effects on scale-up and mass production

Active Publication Date: 2014-06-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small surface area provided by the planar electrode and the few reactive sites, the performance of DBFC is seriously restricted.

Method used

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  • Anode applied to direct hydroboron fuel battery and preparation method of anode
  • Anode applied to direct hydroboron fuel battery and preparation method of anode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] A. Preparation of porous diffusion layer

[0085] 1) Cut a piece of nickel foam with an area of ​​4(cm)×5(cm), a thickness of 0.20mm, and a porosity of 80% as the base material of the anode diffusion layer, and immerse it in acetone at room temperature for 10 minutes to remove oil Decontamination treatment, dry in an oven at 60°C until the weight of the carbon paper is constant, record the weight of the carbon paper, denoted as W 0 ;

[0086] 2) Weigh 160mg of Vulcan XC-72 carbon powder (manufactured by American Cabot Company), add 2.4g of ethylene glycol to it, ultrasonically and stir to disperse the slurry. Fluoride vinyl (PTFE) emulsion 0.2g, continue to ultrasonicate and stir until the slurry is uniform, and obtain a flat layer slurry a coated with a leveling layer;

[0087] 3) Using screen printing technology, evenly screen-print the slurry a obtained in 2) on the surface of nickel foam, and record the weight W of the diffusion layer by weighing method 1 , contr...

Embodiment 2

[0099] A. Preparation of porous diffusion layer

[0100] 1) Cut a piece of Toray TGP-H-060 carbon paper with an area of ​​4(cm)×5(cm) as the base material of the anode diffusion layer, immerse it in absolute ethanol at room temperature for 30min, and perform degreasing and decontamination treatment , dried in an oven at 80°C until the weight of the carbon paper is constant, and the weight of the carbon paper is recorded as W 0 ;

[0101] 2) Weigh 80 mg of high-conductivity carbon black, add 1.2 g of glycerol to it, ultrasonically stir and disperse the slurry. After the dispersion is uniform, add 20 (wt )% polytetrafluoroethylene (PTFE) emulsion 0.267g, continue to ultrasonicate and stir until the slurry is uniform, and obtain a flat layer slurry a coated with a leveling layer;

[0102] 3) Apply the slurry a obtained in 2) evenly on the surface of carbon paper by scraping method, and record the weight W of the diffusion layer by weighing method 1 , control the load of highly...

Embodiment 3

[0114] A. Preparation of porous diffusion layer

[0115] 1) Cut a piece of carbon cloth with an area of ​​4(cm)×5(cm), a thickness of 0.20mm, and a porosity of 78% as the base material of the anode diffusion layer, immerse it in isopropanol at room temperature for 20min, and carry out Degreasing and decontamination treatment, drying in an oven at 80°C until the weight of the carbon paper is constant, record the weight of the carbon paper, denoted as W 0;

[0116] 2) Weigh 40mg of graphite carbon with a particle size of 50~100nm, add 1.2g of absolute ethanol to it, ultrasonically stir and disperse the slurry, after the dispersion is uniform, according to the mass ratio of C:PTFE=4:6, Add 0.3 g of 20 (wt)% polytetrafluoroethylene (PTFE) emulsion dropwise, continue to sonicate and stir until the slurry is uniform, and obtain a flat layer slurry a coated with a leveling layer;

[0117] 3) Using screen printing technology, evenly screen-print the slurry obtained in 2) on the surf...

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Abstract

The invention relates to an anode applied to a direct hydroboron fuel battery and a preparation method of the anode. The anode consists of a catalyst layer and a diffusion layer which are mutually overlapped, wherein the diffusion layer is characterized in that a carbon material or foamed nickel is used as a substrate, and a leveling layer of which the surface is of a micro columnar structure is formed on the substrate; the catalyst layer is that an electrocatalyst for catalyzing a hydroboron to oxidize, and a mixture of a hydrogen evolution inhibitor and an adhesive are used as the raw materials for preparing the catalyst layer on the surface of the leveling layer. The anode prepared by adopting the method has the advantages that the electrochemical reaction area is expanded, the area of an interface between a gas diffusion layer and a catalytic active layer is increased, the active resistance and the ohmic resistance are reduced, the fuel utilization rate is increased, and the performance and the stability of the direct hydroboron fuel battery are improved.

Description

technical field [0001] The invention relates to a direct borohydride fuel cell anode and a preparation method thereof, belonging to the technical field of fuel cells. Background technique [0002] Direct Borohydride Fuel Cell (DBFC) is a kind of using alkali metal borohydride MBH 4 (M=K, Na, Li) fueled power generation device usually uses oxygen (air) or hydrogen peroxide as the oxidant. Due to the advantages of high open-circuit voltage and theoretical energy density, DBFC has attracted extensive attention in recent years, and related technologies have also developed rapidly. [0003] When the direct borohydride fuel cell works, the fuel and the oxidant reach the anode and cathode of the battery through the channels on the end plate respectively, and reach the reaction active center of the electrode catalytic layer through the diffusion layer on the electrode. The role of borohydride in the anode catalyst Under the action of the electrochemical reaction, metaborate and el...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50H01M4/8605H01M4/8657H01M4/8663H01M4/8807H01M4/8835H01M2004/8689
Inventor 张华民邱艳玲曲超张凤祥钟和香
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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