Air electrode for aluminum-air battery and preparation method thereof

A technology of air battery and air electrode, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of high price and inability to realize large-scale application, and achieve the effect of low price, extensive resources, and high power

Active Publication Date: 2017-07-04
云南创能斐源金属燃料电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Noble metal catalyst is an earlier and more common catalyst material, but it is expensive and cannot be used on a large scale

Method used

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  • Air electrode for aluminum-air battery and preparation method thereof
  • Air electrode for aluminum-air battery and preparation method thereof
  • Air electrode for aluminum-air battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] α-MnO 2 As the catalytic material, acetylene black is used as the conductive material, PTFE emulsion is used as the binder material, according to α-MnO 2 The mass content is 64%, the mass content of acetylene black is 12%, and the mass content of PTFE emulsion is 24% to prepare the catalytic layer. α-MnO 2 Disperse acetylene black in 65% alcohol solution, slowly add PTFE emulsion into the dispersion, stir rapidly to obtain a lump, and then roll the lump on a roller press to form a film. The catalytic efficiency of the obtained catalytic layer at normal temperature at -0.35V is 80mA / cm 2 .

Embodiment 2

[0028] β-MnO 2 As the catalytic material, porous carbon is used as the conductive material, and PTFE emulsion is used as the binder material, according to β-MnO 2 The mass content is 30%, the mass content of porous carbon is 30%, and the mass content of PTFE emulsion is 40% to prepare the catalytic layer. β-MnO 2 And the porous carbon is dispersed in ethanol, the PTFE emulsion is slowly added to the dispersion liquid, and stirred rapidly to obtain a dough, and then the dough is rolled on a roller press to form a film. The catalytic efficiency of the obtained catalytic layer at normal temperature at -0.35V is 60mA / cm 2 .

Embodiment 3

[0030] δ-MnO 2 As the catalytic material, carbon nanotubes are used as the conductive material, and polyethylene emulsion is used as the binder material. According to δ-MnO 2 The mass content is 90%, the carbon nanotube mass content is 5%, and the polyethylene emulsion mass content is 5% to prepare the catalytic layer. δ-MnO 2 And the carbon nanotubes are dispersed in ethyl acetate, the polyethylene emulsion is slowly added to the dispersion liquid, stirred rapidly to obtain a lump, and then the lump is rolled on a roller press to form a film. The catalytic efficiency of the obtained catalytic layer at normal temperature at -0.35V is 100mA / cm 2 .

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Abstract

The invention relates to an air electrode used in an aluminum-air battery and a preparation method of the air electrode and belongs to the technical field of batteries. The air electrode can be used in the aluminum-air battery as a positive electrode and is prepared by laminating three layers, namely, a waterproof and gas-permeable layer, a catalyst layer and a collector layer, wherein the catalyst layer comprises the following components in percentage by weight: 30-90% of an electrode catalytic material, 5-30% of a conductive material and 5-40% of a binder material, wherein the total weight of the electrode catalytic material, the conductive material and the binder material is 100% by weight. By controlling the crystal form, doping metals, compounding carbon and the like, the obtained modified manganese dioxide material has catalytic efficiency comparable to that of a noble metal catalyst and can provide higher power for the aluminum-air battery. The preparation method of the catalytic electrode provided by the invention has the characteristics that the method is simple, efficient and clean and environmental pollution cannot be caused.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to an air electrode for an aluminum-air battery and a preparation method thereof. Background technique [0002] Compared with other battery systems, aluminum-air batteries have the advantage of high energy density, which is 8 times that of lead-acid batteries and 2.7 times that of lithium-ion batteries. The advantage of its high energy density is related to the properties of aluminum metal. Aluminum is a high-energy carrier with a theoretical energy density of 2980Ah / kg, second only to metal lithium at 3870Ah / kg, and a volumetric energy density of 8050Ah / m 3 , 4 times that of lithium. [0003] The research on aluminum-air batteries began in the 1960s, and S.Zaromb et al initially confirmed the theoretical feasibility of aluminum-air batteries. In the 1970s, scholars' research focused on the application of aluminum-air batteries to power sources such as navigation li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/86
CPCH01M4/86H01M4/88H01M4/9016Y02E60/50
Inventor 谢刚田永臧建余强徐俊毅和晓才李怀仁姚云柯浪崔涛赖浚田林徐庆鑫魏可余德庆周廷熙
Owner 云南创能斐源金属燃料电池有限公司
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