A kind of nano AGM separator and preparation method thereof

Abstract

The invention discloses a nanometer AGM separator and a preparation method thereof, which is characterized in that the AGM separator is composed of glass fiber, sepiolite powder, rice husk ash and fly ash. The weight percentage of the glass fiber is 40-70%, and the diameter is 1-15 μm; the weight percentage of the sepiolite powder is 10-25%, and the fineness is 350-1000 mesh; the weight percentage of the rice husk ash is 15-25%, and the fineness is 150-325 mesh; the fly ash is the national standard first-class fly ash, the weight percentage is 5-10%, and the fineness is 150-500 mesh. The sepiolite powder, rice husk ash, and fly ash in this kind of separator all have a microscopic and nanoporous structure, which has a strong ability to absorb electrolyte. At the same time, these powders can also support the separator, making the separator structure more stable. . The preparation method requires wide sources of raw materials, low production cost, simple process, and greatly reduces environmental pollution.

Description

technical field [0001] The invention relates to an AGM separator and a preparation method thereof, in particular to a nanoscale AGM separator and a preparation method thereof. Background technique [0002] The battery separator is a porous insulating material, which is placed between the positive and negative plates of the battery to separate the positive and negative plates and play the role of insulation to avoid short circuit of the battery. At the same time, the ions that participate in the chemical reaction are allowed to pass through during the charging and discharging process of the battery. For the sealed maintenance-free battery, it is also necessary to ensure that the oxygen precipitated from the positive electrode reaches the negative electrode through the separator to complete oxidation absorption. At present, the traditional separators commonly used in China include rubber separators, AGM separators, PVC separators, and PP separators. Among them, AGM separator ...

AI Technical Summary

Problems solved by technology

The outer covering fiber is a polymer that can be re-melted during the manufacturing process. This melting can make the special fiber stick to any glass fiber. When the temperature drops to room temperature or battery operating temperature, the melted part changes again. It is tough and strengthens the glass hybrid structure. The AGM separator is reinforced with this special organic fiber, which can withstand the mechanical force of being stretched on the automatic machine in the battery assembly. The structure of the separator is relatively stable, but the production cost is relatively high.