The Global SIBs (Sodium-Ion Battery) 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 (2025–2034). This growth is fueled by increasing demand for sustainable energy storage solutions, rapid expansion of renewable energy infrastructure, and the cost advantages of sodium-ion technology over lithium-ion alternatives.

As the energy storage sector evolves toward more sustainable and cost-effective solutions, key materials suppliers are driving innovation in separator technology. In this blog, we profile the Top 10 Companies in the SIBs Separator Industry—a mix of established battery material giants and specialized manufacturers shaping the future of sodium-ion energy storage.

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🔟 1. SEMCORP Advanced Materials Group

Headquarters: Shanghai, China
Key Offering: Ceramic-coated Polyolefin Separators, Ultra-thin SIB Separators

SEMCORP is a global leader in battery separator technology, supplying high-performance membranes for sodium-ion battery applications. The company has pioneered specialized ceramic coatings that enhance separator thermal stability and ionic conductivity for SIB applications.

Technical Advancements:

• 12μm ultra-thin separator coatings optimized for sodium-ion chemistry
• Patented nano-ceramic composite technology for thermal safety
• Automated production capacity of 400 million sqm/year

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

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9️⃣ 2. Xiamen TOB New Energy Technology

Headquarters: Xiamen, China
Key Offering: Dry-process SIB Separators, Multilayer Composite Films

Xiamen TOB has emerged as a key player in sodium-ion battery separators, specializing in dry-process manufacturing that eliminates solvents. Their proprietary multilayer technology offers superior puncture resistance for high-energy-density applications.

Technical Advancements:

• 18-layer co-extrusion technology for enhanced mechanical strength
• Patent-pending surface treatments for improved electrolyte wettability
• Expanding capacity to 150 million sqm annually by 2026

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

Headquarters: Kunming, China
Key Offering: Hydrophilic Modified SIB Separators, High-Porosity Membranes

Yunnan Energy specializes in functionalized separators for sodium-ion batteries, with a focus on enhanced electrolyte absorption and retention properties critical for cycle life improvement in SIB applications.

Technical Advancements:

• 50% porosity membranes for high-rate capability
• Plasma surface modification technology
• Strategic partnerships with major SIB cell manufacturers

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7️⃣ 4. Shenzhen Senior Technology Material

Headquarters: Shenzhen, China
Key Offering: Reinforced SIB Separators, High-Temp Stable Membranes

Senior Technology focuses on specialty separators for demanding SIB applications, including high-temperature environments and fast-charge scenarios. Their products feature enhanced dimensional stability and shutdown properties.

Technical Advancements:

• 200°C thermal shutdown capability
• Alumina-ceramic composite technology
• Automated optical inspection systems for quality control

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

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

Headquarters: Nanjing, China
Key Offering: Non-Woven SIB Separators, Glass Fiber Composites

Sinoma Tech specializes in alternative separator materials for sodium-ion batteries, particularly non-woven fabrics and glass fiber composites that offer unique advantages for stationary energy storage applications.

Technical Advancements:

• High-absorbency glass fiber membranes
• Reinforced cellulose-based separators
• 300% expansion in production capacity planned through 2025

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5️⃣ 6. Asahi Kasei Corporation

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

The Japanese materials giant has adapted its renowned Hipore separator technology for sodium-ion battery applications, leveraging decades of lithium-ion separator experience to develop optimized products for SIB chemistry.

Technical Advancements:

• Uniform pore distribution technology
• Binder-free separator manufacturing
• Strategic R&D partnerships with Japanese automakers

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4️⃣ 7. SK Innovation

Headquarters: Seoul, South Korea
Key Offering: Wet-process SIB Separators, Ceramic-coated Membranes

SK Innovation’s battery materials division has developed specialized wet-process separators for sodium-ion applications, building on their leadership in lithium-ion battery separators.

Technical Advancements:

• Sub-10μm separators with ceramic coatings
• Automated quality control systems
• Pilot production line for SIB-specific separators

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

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3️⃣ 8. Targray Technology International

Headquarters: Kirkland, Canada
Key Offering: Specialty SIB Separators, Customized Solutions

As a global specialty materials supplier, Targray provides customized separator solutions for sodium-ion battery developers, particularly focusing on North American and European markets.

Technical Advancements:

• Tailored porosity and thickness solutions
• Sustainable separator materials development
• Technical support for SIB prototyping

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2️⃣ 9. Ube Industries

Headquarters: Tokyo, Japan
Key Offering: Ultra-thin SIB Separators, High-Performance Films

Ube Industries applies its polymer technology expertise to develop ultra-thin yet durable separators for high-performance sodium-ion battery applications.

Technical Advancements:

• 8μm ultra-thin separator technology
• Enhanced shutdown properties
• Strategic partnerships with Japanese battery makers

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1️⃣ 10. Entek International

Headquarters: Oregon, USA
Key Offering: PE-based SIB Separators, Specialty Membranes

Entek brings its lithium-ion separator expertise to the sodium-ion battery market, developing polyethylene-based membranes optimized for SIB chemistry and North American manufacturing.

Technical Advancements:

• Automated manufacturing technology
• Patent-pending surface treatments
• Focus on domestic (U.S.) SIB supply chain development

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

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🌍 Outlook: The Future of SIBs Separators Is High-Performance and Customized

The sodium-ion battery separator market is undergoing rapid transformation as the technology matures. While traditional polyolefin separators currently dominate, the industry is investing heavily in advanced materials and manufacturing processes to meet the unique requirements of sodium-ion chemistry.

📈 Key Trends Shaping the Market:

• Accelerating demand for ultra-thin separators (under 12μm) for high energy density
• Growing adoption of ceramic and composite coatings for enhanced safety
• Increasing customization for specific cathode/anode combinations
• Expansion of production capacity in China and strategic localization in other regions

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

The companies listed above are at the forefront of enabling the sodium-ion battery revolution—developing separator technologies that will power the next generation of sustainable energy storage.