Nano AGM (Absorbed Glass Mat) separator and preparation method thereof

Abstract

The invention discloses a nano AGM (Absorbed Glass Mat) separator and a preparation method thereof. The AGM separator is prepared from glass fibers, sepiolite powder, rice hull ash and coal ash, wherein the glass fibers account for 40-70% in percentage by weight and have the diameters of 1-15 microns; the sepiolite powder accounts for 10-25% in percentage by weight and has the fineness of 350-1000 meshes; the rice hull ash accounts for 15-25% and has the fineness of 150-325 meshes; the coal ash is national standard level 1 coal ash which accounts for 5-10% in percentage by weigh and has the fineness of 150-500 meshes. The sepiolite powder, the rice hull ash and the coal ash in the separator all have a microscopic nanopore structure and high electrolyte absorption capacity, and meanwhile, are capable of supporting the separator so that the structure of the separator can be more stable. The preparation method of the nano AGM separator is wide in the source of the needed raw materials, low in production cost, and simple in process; besides, the environmental pollution is greatly reduced.

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.