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Preparation method of direct methanol fuel cell negative support material

A methanol fuel cell and cathode support technology, which is applied to fuel cell parts, fuel cells, sealing/supporting devices, etc., can solve the problems of short service life of the cathode support, difficult to meet market needs, easy deformation and cracking, etc. Achieve the effects of small deformation, lower production cost and low shrinkage

Inactive Publication Date: 2019-10-18
郭峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing problems are: due to the self-sintering properties of mesocarbon microspheres, the particles fuse during the sintering process to form a sintered body, the pores after sintering fuse, the small pores fuse to form large pores, and sintering necks appear. It is easy to be deformed and cracked; the addition of graphite reduces shrinkage and deformation, but still has a large shrinkage rate and a large amount of deformation. The cathode support made of it has a short service life and is difficult to meet market needs. Therefore, a new alternative Mesophase Carbon Microspheres and Graphite Materials to Prepare Cathode Supports

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, the preparation method of a kind of direct methanol fuel cell cathode support body material mentioned in the present invention, comprises the following steps:

[0016] 1. Add 300 kg of divinylbenzene containing 0.1% tert-butylcatechol as a stabilizer and 90 kg of tin oxide into the reactor as raw materials, and add 20 kg of polyvinylpyrrolidone into the reactor to make Dispersant, 1.5 kg of azobisisobutyronitrile as the initiator, 600 kg of anhydrous methanol and 100 kg of deionized water as the dispersion medium, the temperature in the reactor was raised to 70 °C under the protection of nitrogen, and then the dispersion polymerization reaction was carried out for 2 hours. After completion, polydivinylbenzene is uniformly coated on the surface of tin oxide particles.

[0017] 2. Then put the material in the reaction kettle into the filter kettle for suction filtration. The solid particles on the filter cloth are the particles evenly coated with polydivinyl...

Embodiment 2

[0026] Embodiment 2, the preparation method of a kind of direct methanol fuel cell cathode support body material mentioned in the present invention, comprises the following steps:

[0027] 1. Add 350 kg of divinylbenzene containing 0.1% tert-butylcatechol as a stabilizer and 110 kg of tin oxide into the reactor as raw materials, and add 22 kg of polyvinylpyrrolidone in the reactor to make Dispersant, 3 kg of azobisisobutyronitrile as the initiator, 700 kg of anhydrous methanol and 120 kg of deionized water as the dispersion medium, the reaction kettle was heated to 70 °C under the protection of nitrogen, and then dispersed and polymerized for 2.5 hours. The reaction After completion, polydivinylbenzene is uniformly coated on the surface of tin oxide particles.

[0028] 2. Then put the material in the reaction kettle into the filter kettle for suction filtration. The solid particles on the filter cloth are the particles evenly coated with polydivinyl benzene on the surface of t...

Embodiment 3

[0037] Embodiment 3, the preparation method of a kind of direct methanol fuel cell cathode support body material mentioned in the present invention, comprises the following steps:

[0038] 1. Add 320 kg of divinylbenzene containing 0.1% tert-butylcatechol as a stabilizer and 100 kg of tin oxide into the reactor as raw materials, and add 21 kg of polyvinylpyrrolidone into the reactor to make Dispersant, 2 kg of azobisisobutyronitrile as the initiator, 650 kg of anhydrous methanol and 110 kg of deionized water as the dispersion medium, the temperature in the reactor was raised to 70 °C under the protection of nitrogen, and then the dispersion polymerization was carried out for 2.2 hours. After completion, polydivinylbenzene is uniformly coated on the surface of tin oxide particles.

[0039] 2. Then put the material in the reaction kettle into the filter kettle for suction filtration. The solid particles on the filter cloth are the particles evenly coated with polydivinyl benzene...

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Abstract

The invention relates to a preparation method of a direct methanol fuel cell negative support material. According to the technical scheme, the preparation method mainly comprises the following steps:taking divinylbenzene containing tert-butyl catechol as a stabilizer and tin oxide as raw materials; coating the surface of the tin oxide with polydivinylbenzene by adopting a dispersion polymerization method; and then performing pyrolysis to prepare the direct methanol fuel cell negative support material with tin particles uniformly dispersed in a carbon matrix. The preparation method has the beneficial effects that the preparation cost can be greatly reduced; the cost performance is relatively high; the material has relatively strong market competitiveness compared with products at home andabroad; the direct methanol fuel cell negative support material product can be manufactured through the method; and a negative support body manufactured from the negative support material has the characteristics of being low in shrinkage rate, small in deformation, high in graphitization degree, high in conductivity, good in mechanical property and the like.

Description

technical field [0001] The invention relates to the preparation of a fuel cell cathode support material, in particular to a preparation method of a direct methanol fuel cell cathode support material. Background technique [0002] Direct methanol fuel cell (DMFC) uses cheap liquid methanol as fuel. Compared with hydrogen-oxygen fuel cell, it can save various auxiliary hydrogen production and purification systems, so it is especially suitable for mobile power sources, such as mobile phones. , notebook computers and electric vehicle power supplies, etc. At present, many countries have invested huge manpower and material resources to carry out in-depth basic research and practical application exploration. Judging from the current research progress of various countries in the world, direct methanol fuel cells will be developed much faster than people imagined. [0003] Among them, the cathode support body of the direct alcohol fuel cell is an important product. The existing conv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0282H01M8/1011
CPCH01M8/0282H01M8/1011Y02E60/50Y02P70/50
Inventor 郭峰刘森瑞张润泽张媛媛
Owner 郭峰
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