Air cathode for zinc air cell

A zinc-air battery, air cathode technology, applied in battery electrodes, circuits, fuel cell type half cells and primary cell type half cells, etc., can solve the problem of low performance, small three-phase interface area, poor current collecting effect It can improve the discharge performance and improve the current collecting effect.

Active Publication Date: 2015-06-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

Traditional air cathodes generally press the diffusion layer, current collector, and catalytic layer into electrodes by mechanical methods, but due to poor current collection effect and small three-phase interface area, the performance is not high

Method used

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  • Air cathode for zinc air cell
  • Air cathode for zinc air cell

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Experimental program
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Embodiment 1

[0018] The air cathode includes a first electrode and a second electrode. The thickness of the first electrode is 0.8mm. The thickness of the hydrophobic and air-permeable layer in the first electrode is 0.2mm. The carbon material of the first electrode’s hydrophobic and air-permeable layer is acetylene black, and the hydrophobic agent is PTFE, acetylene The black content is 40%, the PTFE content is 60%, the current collector of the first catalytic layer is nickel foam, the thickness is 0.25mm, the thickness of the first catalytic layer is 0.35mm, the composition and content of the first catalyst paste: carbon-supported silver catalyst The content of carbon-supported manganese catalyst is 5.7% and the content of carbon-supported manganese catalyst is 5.8%

[0019] The thickness of the second electrode is 0.80mm, the current collector of the second catalytic layer is nickel foam, the thickness is 0.27mm; the thickness of the second catalytic layer is 0.53mm, the composition and ...

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Abstract

An air cathode for a zinc air cell comprises a first electrode and a second electrode which are sequentially superposed in a layered manner; the first electrode comprises a hydrophobic breathable layer, a first current collector and a first catalytic layer; and the second electrode comprises a second current collector and a second catalytic layer. Compared with cathodes in the prior art, the air cathode for the zinc air cell, adopting the double current collector layer structure has the advantages of substantial improvement of the current collection effect, facilitation of formation of a certain aperture structure, increase of the area of a three-phase interface, convenient oxygen diffusion, and improvement of the discharge performance of the air electrode.

Description

technical field [0001] The invention relates to the field of zinc-air batteries, in particular to an air cathode for zinc-air batteries. Background technique [0002] A zinc-air battery is an electrochemical reaction device that uses zinc as the anode, an air electrode as the cathode, and an alkaline KOH solution as the electrolyte solution. Zinc-air batteries are low-cost raw materials, green and environmentally friendly, and have low production costs. They are used in electric vehicles, emergency power supplies and other fields. They are one of the most promising green and clean energy sources. [0003] In the actual use of zinc-air batteries, their application range is limited due to their low discharge performance. The three-phase interface area has a great influence on the discharge performance of the air electrode. In order to improve the high current density discharge capacity of zinc-air batteries, it is of great significance to increase the three-phase interface ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M12/06
Inventor 孙公权齐鹭汀王素力王二东
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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