Aerogel Thermal Barrier Core Sheet
Aerogel thermal barrier core sheets are a class of thermal insulation materials, which typically use silica (SiO2) aerogel as the core material. It is further reinforced with high-performance inorganic fibers such as glass fiber, basalt fiber, or ceramic fiber to form a composite structure. This provides the material with high thermal insulation, flame retardancy, and extremely low thickness. This also makes it a necessary safety device for the power battery system of electric vehicles to avoid the spread of thermal runaway between power battery cells.
At Alfa Chemistry, we provide aerogel-based thermal barrier materials for use in challenging conditions that require high efficiency, large thermal resistance, and environmentally friendly applications. Aerogel sheets are installed between battery cells to prevent the propagation of thermal runaway.
Specification
| Items | Parameters |
| Catalog | GEL-AC030 |
| Density | 140–180 kg/m3 |
| Hydrophobicity | ≥99% |
| Vibration Powder Loss Rate | ≤0.5% |
| Color Options | Light yellow, gray, or white |
| Form | Thin flexible sheets |
| Thickness | 0.1~3.0mm, customizable |
| Dimensions | Width × Length customizable |
| Recommended Storage | 5°C to 45°C |
*Note: The product parameters listed on the page are for reference only, and can be adjusted according to your actual needs.
Technical Advantages
Exceptional Thermal Insulation
The extremely low thermal conductivity of ≤0.020 W/(m·K) at 25℃ of the aerogel core endows the aerogel core composite sheet with excellent heat resistance in very small thicknesses. This feature helps reduce the thermal coupling between adjacent cells in cases of high energy density or abnormal heat generation.
Ultra-Thin and Lightweight Design
Customized in thickness from 0.1 mm to 3.0 mm, the sheets take up minimal space in battery modules, resulting in increased energy density and better volume utilization in battery packs.
High-Temperature Resistance
The composite structure allows for outstanding thermal stability across a wide temperature range, depending on the reinforcing fiber:
| Fiber Type | Max Working Temperature |
| Glass Fiber Composite | ≤580°C |
| Basalt Fiber Composite | ≤800°C |
| Ceramic Fiber Composite | ≤1300°C |
A1-Class Flame Retardancy
Sheet has passed the highest level of flame retardancy certification and works as an active thermal barrier during a thermal event to suppress fire spread.
Superior Safety Performance
When one cell in a battery pack is in thermal runaway, the aerogel thermal barrier sheet cuts off the heat transfer path, effectively isolates the damaged cell and stops the propagation to surrounding cells, and breaks the thermal propagation link, thus avoiding the risk of a catastrophic battery failure.
Eco-Friendly Inorganic Composition
All the components of aerogel thermal barrier sheet are inorganic, non-toxic, non-corrosive and environmentally friendly materials, such as SiO2 aerogel and non-organic fibers, and the product achieves green global environmental protection standards for the entire life cycle.
Application Scope
These aerogel thermal barrier sheets are tailored for lithium-ion battery modules used in:
- Electric passenger vehicles
- Commercial electric fleets
- Energy storage systems (ESS)
- Aerospace-grade power systems
- Hybrid and plug-in hybrid electric vehicles
By incorporating Alfa Chemistry's thermal barriers into battery design, engineers achieve enhanced passive safety without compromising cell-to-cell energy density or increasing module weight.
Why Choose Us?
Alfa Chemistry is proud to offer high-quality aerogel thermal barrier core sheets to our customers. In addition, you can also customize the product according to your actual needs for product performance and applications. Just call us if you need help, and we will deliver the product on time and under budget.
FAQs
1. What is the purpose of using aerogel thermal barriers in EV batteries?
They serve as ultra-thin, high-performance heat shields between battery cells to prevent thermal propagation during cell failure, significantly improving vehicle safety.
2. Are these sheets compatible with both pouch and cylindrical cell formats?
Absolutely. The flexible and thin structure makes them suitable for all common cell formats used in EV and ESS systems.
3. Do the materials degrade over time or lose insulation efficiency?
The inorganic structure provides long-term thermal stability, moisture resistance, and minimal degradation, even under cyclic thermal stress.
4. Are there any adhesives required for installation?
Depending on application needs, sheets can be mechanically secured or paired with high-temperature adhesive systems for integrated assembly.
5. Is the product recyclable?
As it is composed of non-toxic, inorganic materials, it is compliant with global environmental standards and can be safely disposed of or recycled.
6. Can this product be used in aerospace applications?
Yes. Due to its high temperature resistance and ultra-lightweight design, it is suitable for demanding environments such as aerospace thermal shielding.
7. How does the product perform under mechanical vibration?
With a powder loss rate of ≤0.5%, it demonstrates excellent vibration resistance, making it suitable for high-dynamic environments like EVs.
8. What is the shelf life or storage recommendation?
Store in a dry, cool environment between 5°C and 45°C for optimal long-term performance.
Please kindly note that our products and services are for research use only.
