The Global Separator for Electric Double Layer Capacitor (EDLC) Market was valued at USD 64.38 Million in 2025 and is projected to reach USD 136 Million by 2034, growing at a Compound Annual Growth Rate (CAGR) of 11.4% during the forecast period. This sustained growth is propelled by the escalating demand for high-power energy storage solutions in electric vehicles, renewable energy systems, and advanced electronics, where the separator’s role in ensuring safety and performance is absolutely critical.

As the global push for efficient energy storage intensifies, the focus sharpens on the specialized manufacturers producing the vital components that enable supercapacitor technology. In this blog, we profile the Top 10 Companies in the Separator for Electric Double Layer Capacitor Industry—a group of material science pioneers and manufacturing specialists who are defining the standards for reliability and efficiency in next-generation energy storage.

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🔟 1. Nippon Kodoshi Corporation

Headquarters: Kochi, Japan
Key Offering: High-Performance Capacitor Paper Separators

Nippon Kodoshi Corporation is a globally recognized leader in the production of specialty papers for capacitors, including dedicated separators for Electric Double Layer Capacitors. The company’s expertise lies in manufacturing highly porous, chemically stable cellulose-based papers that are essential for facilitating ion transport and preventing short circuits in EDLCs. Their products are known for exceptional electrolyte retention and thermal stability.

Innovation and R&D Focus:

• Development of ultra-thin, high-porosity separator papers for increased power density

• Advanced surface treatment technologies to enhance electrolyte wettability

• R&D into hybrid and synthetic fiber materials for next-generation applications

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9️⃣ 2. Mitsubishi Paper Mills Limited

Headquarters: Tokyo, Japan
Key Offering: Synthetic Polymer (PPS) and Specialty Paper Separators

Mitsubishi Paper Mills is a major force in the EDLC separator market, offering a diverse portfolio that includes advanced Polyphenylene Sulfide (PPS) non-woven fabrics and high-grade capacitor papers. Their separators are prized for superior chemical resistance and ability to withstand the high-temperature environments often encountered in automotive and industrial EDLC applications.

Innovation and R&D Focus:

• Pioneering the use of PPS fibers for enhanced thermal and electrochemical stability

• Customized separator solutions for automotive-grade supercapacitors

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8️⃣ 3. delfortgroup AG

Headquarters: Traun, Austria
Key Offering: Technical Specialty Papers for EDLCs

delfortgroup brings European engineering excellence to the EDLC separator market, specializing in high-performance technical papers. Their products are designed to meet the rigorous demands of modern supercapacitors, offering excellent mechanical strength, controlled porosity, and compatibility with various organic electrolytes.

Innovation and R&D Focus:

• Focus on sustainable and bio-based paper materials

• Development of separators with optimized pore structures for low internal resistance

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7️⃣ 4. Bernard Dumas

Headquarters: Cusset, France
Key Offering: Precision Non-Woven Separator Materials

Bernard Dumas is a specialist in non-woven textiles and technical papers, supplying high-quality separator materials to the capacitor industry. Their expertise in manufacturing consistent, high-purity materials makes them a key supplier for EDLC manufacturers requiring reliable performance in demanding applications.

Innovation and R&D Focus:

• Advanced non-woven fabric technologies for improved separator integrity

• Tailored solutions for specific electrolyte and electrode chemistries

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6️⃣ 5. Glatfelter Corporation

Headquarters: Charlotte, North Carolina, USA
Key Offering: Engineered Materials for Energy Storage

Glatfelter is a leading global supplier of engineered materials, including advanced separator solutions for the energy storage sector. Their innovative approach to material science has positioned them as a valuable partner for EDLC manufacturers looking for high-performance, reliable separator components.

Innovation and R&D Focus:

• Development of composite separator materials

• Focus on scalability and cost-effective manufacturing processes

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5️⃣ 6. Dreamweaver International

Headquarters: Schenectady, New York, USA
Key Offering: Electrospun Nanofiber Separators

Dreamweaver International stands out for its innovative electrospinning technology, which produces nanofiber separators with unparalleled control over pore size and distribution. These separators offer exceptionally high porosity and surface area, leading to superior ion transport and reduced internal resistance in EDLCs.

Innovation and R&D Focus:

• Proprietary electrospinning processes for nanofiber production

• Focus on high-power application requirements

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4️⃣ 7. Freudenberg Performance Materials

Headquarters: Weinheim, Germany
Key Offering: High-Stability Nonwoven Separators

Freudenberg brings decades of experience in nonwoven materials to the EDLC separator market. Their products are known for excellent durability, consistent quality, and ability to perform under strenuous conditions, making them suitable for automotive and industrial supercapacitor applications.

Innovation and R&D Focus:

• Development of separators with enhanced mechanical robustness

• Materials engineered for long-term reliability in cyclic applications

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3️⃣ 8. Hollingsworth & Vose Company

Headquarters: East Walpole, Massachusetts, USA
Key Offering: Advanced Filter Media and Separator Solutions

Hollingsworth & Vose leverages its extensive expertise in advanced filtration media to produce high-performance separators for energy storage applications. Their technical knowledge in material science allows them to create separators with precisely engineered properties for optimal EDLC performance.

Innovation and R&D Focus:

• Application of filtration technology principles to separator design

• Focus on purity and consistency in material production

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2️⃣ 9. SEPARION (Evonik)

Headquarters: Essen, Germany
Key Offering: Ceramic-Coated Separator Technologies

While historically focused on lithium-ion batteries, SEPARION’s expertise in ceramic-coated separator technologies presents significant potential for high-performance EDLC applications. Their separators offer enhanced safety characteristics and thermal stability, which are increasingly important for next-generation supercapacitors.

Innovation and R&D Focus:

• Ceramic coating technologies for improved separator safety

• Cross-technology application of advanced separator concepts

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1️⃣ 10. Toray Industries, Inc.

Headquarters: Tokyo, Japan
Key Offering: Advanced Synthetic Fiber Separators

Toray Industries, as a global leader in advanced materials, brings its substantial R&D capabilities to the separator market. Their work in synthetic fibers and membranes positions them to develop next-generation separator materials that could significantly enhance EDLC performance metrics.

Innovation and R&D Focus:

• Development of high-performance polymer-based separator films

• Research into novel material compositions for future energy storage

Get Full Report Here:
Separator for Electric Double Layer Capacitor Market – View in Detailed Research Report

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🌍 Outlook: The Future of EDLC Separators Is High-Performance and Intelligent

The separator for electric double layer capacitor market is undergoing a significant technological evolution. While traditional cellulose papers continue to serve many applications, the industry is increasingly investing in advanced material science, nanotechnology, and manufacturing processes to meet the demanding requirements of modern energy storage systems.

📈 Key Trends Shaping the Market:

• Accelerated adoption of synthetic polymers like PPS for superior thermal and chemical stability

• Growing implementation of electrospun nanofiber separators for ultra-high power density applications

• Increasing focus on hydrophilic surface modifications to enhance electrolyte wettability and ion transport

• Strategic collaborations between separator manufacturers and EDLC producers to develop application-specific solutions

Get Full Report Here:
Separator for Electric Double Layer Capacitor Market – View in Detailed Research Report

The companies listed above are not only supplying essential components for energy storage—they’re driving the technological advancement that will power the next generation of electric vehicles, renewable energy systems, and high-tech electronics.