Fumed silica is widely utilized in battery applications. It plays a crucial role in mitigating issues commonly encountered during battery operation, such as thermal runaway, uneven electrolyte distribution, and acid stratification. Moreover, fumed silica enhances the battery’s discharge resistance, boosts its capacity, and extends its overall lifespan.

Why add fumed silica to the Battery?

  • Fumed silica’s high surface area and porosity provide a larger interface for electrochemical reactions, promoting efficient ion transport and enhancing the battery’s performance.
  • Helps improve the mechanical stability of electrode materials, reducing electrode deformation and improving cycling stability.
  • fumed silica can enhance the adhesion between electrode materials and current collectors, leading to better electron transfer and reduced internal resistance.
  • Moreover, fumed silica’s thermal conductivity and heat dissipation properties aid in managing temperature rise and mitigating the risk of thermal runaway.

performance of fumed silica in Batteries

Thickening and Thixotropic behavior

Adding fumed silica increases the viscosity and consistency of the battery gel/electrolyte, forming a structured network with thixotropic behavior. It thickens upon charging and thins during discharge. This thickening and thixotropic behavior greatly enhances the performance of the colloidal system, effectively improving the battery’s performance and significantly extending its lifespan.


Fumed silica exhibits high chemical inertness, which means it does not undergo chemical reactions. This property helps maintain the stability of the battery, thereby prolonging its lifespan.

High Purity

Fumed silica is a high-purity material that is non-toxic, harmless, and free from contamination. It has no adverse effects on the stability, power, and lifespan of the battery.

ApplicationBenefits and Functions
Gel BatteriesThickening and thixotropic behavior of HIFULL fumed silica maintains desired viscosity during cycles
Enables sealed cyclic reactions without maintenance
Enhances battery lifespan and stability
Increases charge-discharge cycles
Lithium BatteriesImproves energy density and capacity
Extends battery lifespan
Enhances cycling performance
Increases heating rate and charging efficiency
Lead-Acid BatteriesEnhances gel strength
Improves battery cycling lifespan
Significantly increases grouping rate
Lithium-Sulfur BatteriesControls uniform distribution and dense deposition of lithium ions
Maintains stable electrolyte ion concentration
Suppresses side reactions
Increases number of discharge cycles

Fumed Silica Grade Recommendation for Batteries

  • White nanoparticle size powder
  • High purity
  • High specific surface area(140 – 400㎡ /g)
  • Applicable to water-based and oil-based chemical products
  • Recommended Dosage: 1-4wt%
  • Recommended HIFULL products for silicon rubber application:
  • Hydrophilic Grades: HL-200,


Our main products are fumed silica SiO2, fumed titanium dioxide TiO2, and fumed alumina Al2O3. We get 20+ years of expertise and 20,000 tons of annual capacity. We supply total of 23 grades of hydrophilic & hydrophobic fumed silica. We get registration of REACH and pre-registration of K-REACH & KKDIK. We are the leading setting body of ISO18473-1:2015ISO18473-3:2018, and ISO 23157:2021. Learn More About Hifull

Other Application

Hello, Customers

My name is Van, I’m the business manager of HIFULL, I have been in Fumed Silica Industry for more than 10 years. Feel free to contact me. I’m happy to provide you the best service and products.
Business Manager