Dry pressing process for producing cathode of oxygen making machine

Abstract

The invention proposes a method for producing the cathode of an oxygen generator by dry pressing, which belongs to the technology of taking oxygen from the cathode of an electrochemical oxygen production unit and ion membrane in water. Phosphorus flake graphite and foaming agent and other auxiliary materials are added, and the cathode of the oxygen making unit is produced according to the steps of metering and batching, stirring and mixing, dry pressing into the mold and roasting and shaping. It has excellent air permeability and waterproof performance and good low resistance performance. Advantages, compared with the "wet rolling" method, the dry pressing forming technology proposed by the present invention significantly improves the process operability of the copper mesh electrode lead embedded in the cathode. It has simple process, convenient operation and high operating efficiency. , the production cost is low, and the cathode produced by the dry pressure method is equipped with the oxygen generator, which can significantly improve the oxygen production and work stability, and has a good effect on improving and improving the product quality of the oxygen generator. Promoting prospects for use.

Description

Technical field: [0001] The invention relates to the production technology of oxygen-making electrode materials, and belongs to the technical field of cathode materials for electrochemical ion membrane oxygen-making units and ion membrane oxygen extraction in water, and specifically relates to a method for producing the cathode of an oxygen generator by a dry pressing method. Background technique: [0002] We know that existing home medical oxygen generators are generally divided into two methods: physical oxygen generation and chemical oxygen generation. Physical oxygen generation uses polymer sieve pressure swing adsorption separation technology to separate nitrogen and oxygen from the air medium to produce oxygen for absorption. Although physical oxygen generators have the advantages of rich oxygen resources, sufficient oxygen production and stable oxygen delivery, but Due to the shortcomings of physical oxygen generators such as complex structure, loud compressor operati...

AI Technical Summary

Problems solved by technology

The cathode products produced by this "wet rolling-roasting and shaping" method have the following defects: the process operation performance of the copper mesh electrode lead wire of the finished cathode product on the twin-roll rolling mill is poor, and the production efficiency is low , especially in the process of roasting and shaping, a large amount of liquid medium will evaporate in the muddy material, which not only affects the stability of the outer dimension of the finished cathode, but also buries bubbles and even hidden cracks in the finished cathode. It affects the mechanical strength and waterproof and breathable performance of the finished cathode. In actual use, it shows that the electrode lead has poor reliability and is prone to layered and water-permeable, resulting in a decrease in the electrical conductivity of the cathode, which will inevitably affect the working efficiency of the oxygen generator.

This is a fatal technical defect that is difficult to overcome for cathode products currently produced by wet rolling.