The emerging concept of aerogels is becoming increasingly attractive in the design of thermal insulation and environmentally friendly lightweight materials. Inspired by its favorable characteristics such as extremely low density, high porosity and large specific surface area, a large number of different types of aerogel materials have been reported so far. 
The aerogel products are made by combining nano-aerogel with base materials such as polyacrylonitrile, glass fibers, and ceramic fibers. This combination perfectly integrates the excellent properties of aerogel with flexible base materials, maximizing the retention of aerogel's lightweight and heat insulation characteristics, while also endowing aerogel with flexibility and toughness. 
1. Polyacrylonitrile (Pre-oxygenated Fiber) 
Polyacrylonitrile pre-oxidized fibers are commonly referred to as pre-oxidized fibers. They are the basic material for producing carbon fibers. These fibers have good flexibility, can withstand temperatures up to 450℃, do not smolder, and are mainly used in the production of high-temperature sealing fillers, fireproof and flame-retardant materials, heat-resistant fabrics, and fillers. 
The aerogel material is prepared by using the pre-oxygenated fiber reinforcement technology. It is fabricated through the processes of impregnation with sol, gelation, modification and supercritical drying. It features low thermal conductivity, good flexibility, excellent fire resistance, high tensile strength and natural fire resistance. It is applied in the heat insulation of the battery cells and modules of new energy passenger vehicles, as well as the heat insulation of 3C electronic products. 
II. Glass Fiber 
Glass fiber is an excellent inorganic non-metallic material with diverse types. Its advantages include good insulation, high heat resistance up to 650℃, excellent corrosion resistance, and high mechanical strength. However, its disadvantage is brittleness and poor wear resistance. Glass fiber is one of the earlier studied reinforcing phases in silica aerogel composite materials, which can significantly improve the mechanical properties and thermal stability of silica aerogel. Glass fiber also has excellent strength and toughness, thus providing support. It can not only reduce the volume shrinkage of the composite material after heat treatment but also enhance the compressive strength of the composite material. 
The aerogel material is prepared by using the fiber reinforcement technology, through processes such as impregnation of sol, gel, solvent replacement and supercritical drying. It features low thermal conductivity, high water repellency, good shock resistance, and natural fire resistance. At the same time, flexible or rigid inorganic fiber-reinforced aerogel materials can be produced according to requirements, and they can be applied in the insulation and fireproofing of new energy commercial vehicles, insulation and energy-saving of petroleum pipelines and anti-corrosion protection, insulation and energy-saving of heating pipelines, insulation and fireproofing of building exterior walls, insulation and heat preservation of high-temperature pipelines and equipment in the thermal power field, insulation and cold protection of LNG and other deep-seated pipelines and equipment, etc. 
III. Ceramic Fibers 
Ceramic fibers possess the advantages of low density, high fire resistance, and low thermal conductivity. They have broad application prospects in fields such as insulation, insulation, sound insulation, catalyst loading, and energy storage. 
This product adopts the high-temperature-resistant ceramic fiber composite technology. It is obtained through processes such as impregnation with sol, gelation, solvent replacement, and supercritical drying. It features high temperature resistance and low thermal conductivity. It is used for heat insulation, flame retardancy, buffering, and heat runaway protection of the cell and module separators in high-end new energy passenger vehicles.