The Global SIBs Separator Market was valued at USD 653.4 Million in 2025 and is projected to reach USD 1.85 Billion by 2034, growing at a Compound Annual Growth Rate (CAGR) of 12.7% during the forecast period (2024–2034). This growth is being fueled by increasing demand for sustainable energy storage solutions, rapid expansion of renewable energy infrastructure, and the accelerating adoption of sodium-ion batteries across various industries.

As the energy storage industry transitions toward more cost-effective and sustainable technologies, the focus is on separator manufacturers who are driving innovation in battery safety and performance. In this blog, we profile the Top 10 Companies in the SIBs Separator Industry—a mix of material science leaders and specialized manufacturers shaping the future of sodium-ion battery technology.

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🔟 1. SEMCORP

Headquarters: Shanghai, China
Key Offering: Polyolefin Composite Separators, Ceramic-Coated Separators

SEMCORP is a global leader in battery separator technology, supplying high-performance separators for sodium-ion batteries across energy storage and power applications. The company has established an integrated supply chain from raw materials to finished products, serving major battery manufacturers worldwide.

Innovation Focus:

• Pioneering ultra-thin separator technology (16-20μm)
• Developing high-porosity separators for fast charging
• Expanding production capacity to meet growing SIB demand

Download FREE Sample Report: SIBs Separator Market – View in Detailed Research Report

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9️⃣ 2. Xiamen TOB New Energy Technology Co., Ltd.

Headquarters: Xiamen, China
Key Offering: High-Temperature Resistant Separators, Surface-Modified Separators

Xiamen TOB specializes in advanced separators for next-generation batteries, with significant expertise in sodium-ion battery applications. The company has developed proprietary coating technologies that enhance separator performance and safety in SIBs.

Innovation Focus:

• Alumina-coated separators with 200°C thermal stability
• Customized separator solutions for different SIB chemistries
• Partnering with leading battery researchers for product development

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8️⃣ 3. Yunnan Energy New Material Co., Ltd.

Headquarters: Kunming, China
Key Offering: Wet-Process Separators, Multi-Layer Composite Separators

Yunnan Energy focuses on high-end separator products for energy storage applications, with a strong presence in the growing SIB market. The company operates one of Asia’s largest separator production bases with advanced quality control systems.

Innovation Focus:

• Developing separators optimized for Prussian blue cathode SIBs
• Implementing AI-driven quality inspection systems
• Expanding overseas sales network through strategic partnerships

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7️⃣ 4. Shenzhen Senior Technology Material Co., Ltd.

Headquarters: Shenzhen, China
Key Offering: Nanofiber Separators, Ultra-High Porosity Separators

Senior Technology has emerged as a key supplier for sodium-ion batteries, particularly in power applications. The company’s separators are known for their exceptional mechanical strength and electrolyte wettability properties.

Innovation Focus:

• Advanced nanofiber technology for dendrite prevention
• Separators with controlled porosity gradients
• Developing recycled material-based sustainable separators

Download FREE Sample Report: SIBs Separator Market – View in Detailed Research Report

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6️⃣ 5. Sinoma Science & Technology Co., Ltd.

Headquarters: Beijing, China
Key Offering: Ceramic Composite Separators, High-Energy-Density Separators

Sinoma leverages its materials science expertise to develop high-performance separators for emerging battery technologies. The company has made significant R&D investments in separators tailored for sodium-ion battery chemistries.

Innovation Focus:

• Separators with ionic conductivity enhancers
• Developing lower-cost production processes
• Custom separator designs for large-format SIB cells

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5️⃣ 6. Entek International

Headquarters: Oregon, USA
Key Offering: Ultra-Dry Separators, High-Strength Separators

Entek is a leading international manufacturer bringing its lithium-ion separator expertise to the sodium-ion battery market. The company’s production facilities in the U.S. and Europe position it well to serve global SIB manufacturers.

Innovation Focus:

• Developing thermally stable separators for high-voltage SIBs
• Scalable production processes for mass adoption
• Quality control systems for automotive-grade separators

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4️⃣ 7. Asahi Kasei Corporation

Headquarters: Tokyo, Japan
Key Offering: Hipore™ Microporous Films, Advanced Composite Separators

Asahi Kasei leverages its decades of polymer science expertise to develop premium separators for next-generation batteries. The company is actively developing specialized formulations for sodium-ion battery applications.

Innovation Focus:

• High-permeability separators for power applications
• Developing sustainable separator materials
• Tailoring separator properties to different SIB electrode chemistries

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3️⃣ 8. SK Innovation Co., Ltd.

Headquarters: Seoul, South Korea
Key Offering: Ceramic-Coated Separators, High-Safety Separators

SK Innovation is expanding its separator business to support emerging battery technologies, including sodium-ion. The company’s extensive experience in lithium-ion separators provides a strong foundation for SIB applications.

Innovation Focus:

• Developing separators with shutdown functionality for SIBs
• Advanced coating technologies to prevent dendrite growth
• Establishing partnerships with SIB cell manufacturers

Download FREE Sample Report: SIBs Separator Market – View in Detailed Research Report

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2️⃣ 9. Freudenberg Performance Materials

Headquarters: Weinheim, Germany
Key Offering: Non-Woven Separators, High-Porosity Separators

Freudenberg brings its unique non-woven separator technology to the sodium-ion battery market, offering alternative solutions to conventional polyolefin separators. The company’s products are particularly suited for high-power SIB applications.

Innovation Focus:

• Developing sustainable separator materials
• High-absorbency separators for liquid electrolytes
• Innovative manufacturing processes for customized solutions

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1️⃣ 10. Toray Industries, Inc.

Headquarters: Tokyo, Japan
Key Offering: Heat-Resistant Separators, Surface-Modified Membranes

Toray is applying its advanced materials expertise to develop high-performance separators for sodium-ion batteries. The company’s separator technology focuses on enhancing safety and cycle life in SIB applications.

Innovation Focus:

• Developing ultrathin separators with high mechanical strength
• Advanced surface treatments for improved ionic conductivity
• Collaborating with leading SIB developers for product optimization

Get Full Report Here: SIBs Separator Market – View in Detailed Research Report

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🔋 Outlook: The Future of SIBs Separators Is Innovation-Driven

The SIBs separator market is undergoing rapid transformation as sodium-ion battery technology matures and gains adoption across industries. While conventional polyolefin separators currently dominate, the market is seeing increased innovation in materials and manufacturing processes.

📈 Key Trends Shaping the Market:

• Development of ultra-thin separators (below 16μm) to increase energy density
• Growing adoption of ceramic and composite coatings for enhanced safety
• Increasing focus on sustainable and recyclable separator materials
• Custom separator solutions for different SIB chemistries and applications

Get Full Report Here: SIBs Separator Market – View in Detailed Research Report

The companies listed above are not only supplying critical components—they’re enabling the broader adoption of sodium-ion battery technology through continuous innovation in separator performance and manufacturing.