The Global Lithium Ion Battery Separators Market was valued at US$ 2,988.1 Million in 2022 and is projected to reach US$ 3,666.6 Million by 2030, growing at a Compound Annual Growth Rate (CAGR) of 3.0% during the forecast period (2024–2030). This sustained growth is primarily driven by the exponential rise in electric vehicle (EV) production, the expanding market for consumer electronics, and significant global investments in electric power storage systems, all of which demand high-performance, safe, and efficient battery components.

As the world accelerates its shift towards electrification and renewable energy, the critical role of the battery separator—the thin, porous membrane that prevents short circuits while enabling ion flow—has come into sharp focus. In this blog, we profile the Top 10 Companies in the Lithium Ion Battery Separators Industry, a group of materials science innovators and manufacturing giants who are setting the standards for safety, performance, and scalability in the global battery supply chain.

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🔟 1. Asahi Kasei Corporation

Headquarters: Tokyo, Japan
Key Offering: Hipore™ wet-process separators

Asahi Kasei is a global leader in lithium-ion battery separators, renowned for its high-performance Hipore™ brand. These separators are produced using a wet-process technology that creates a highly uniform microporous structure, offering excellent mechanical strength, thermal stability, and electrolyte retention. The company is a key supplier to major battery manufacturers worldwide.

Innovation and Expansion Initiatives:

• Continuous capacity expansion to meet soaring EV battery demand

• Development of advanced coatings to enhance safety and cycle life

• Strategic focus on high-energy-density battery applications

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9️⃣ 2. SK Innovation (SK ie technology)

Headquarters: Seoul, South Korea
Key Offering: Li-ion Battery Separators (LIBS)

SK ie technology, a subsidiary of SK Innovation, is one of the world’s top three lithium-ion battery separator manufacturers. The company specializes in both wet-process and ceramic-coated separators, providing critical components for the automotive and energy storage sectors. Its global production footprint supports a resilient supply chain.

Innovation and Expansion Initiatives:

• Aggressive global capacity expansion in Poland, China, and South Korea

• Pioneering ultra-thin separators for next-generation batteries

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8️⃣ 3. Toray Industries, Inc.

Headquarters: Tokyo, Japan
Key Offering: Torayset™ battery separators

Toray Industries leverages its deep expertise in synthetic fibers and membranes to produce high-quality battery separators. Its Torayset™ separators are known for their dimensional stability and reliability, making them a preferred choice for power-intensive applications, including electric vehicles and industrial energy storage.

Innovation and Expansion Initiatives:

• Investment in R&D for high-temperature resistant separators

• Expansion of production capabilities to serve the global EV market

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7️⃣ 4. Celgard, LLC (Part of Asahi Kasei)

Headquarters: Charlotte, North Carolina, USA
Key Offering: Dry-process microporous membranes

Celgard is a pioneer in dry-process separator technology and is now a wholly-owned subsidiary of Asahi Kasei. Its membranes are widely used in consumer electronics, power tools, and electric vehicle batteries. The company’s expertise in creating trilayer PP/PE/PP separators is particularly valued for its shutdown functionality, a critical safety feature.

Innovation and Expansion Initiatives:

• Integration with Asahi Kasei to combine wet and dry process expertise

• Focus on developing separators for solid-state and advanced lithium-metal batteries

Download FREE Sample Report:
Lithium Ion Battery Separators Market – View in Detailed Research Report

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6️⃣ 5. UBE Corporation

Headquarters: Tokyo, Japan
Key Offering: U-Pore™ battery separators

UBE Corporation is a leading chemical manufacturer with a strong presence in the battery separator market. The company produces a range of high-performance separators using its proprietary technology, catering to the needs of the automotive and industrial battery sectors with a focus on safety and durability.

Innovation and Expansion Initiatives:

• Expansion of production capacity in Japan and overseas

• Development of specialized separators for high-power applications

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5️⃣ 6. Sumitomo Chemical Co., Ltd.

Headquarters: Tokyo, Japan
Key Offering: Porous polyethylene film separators

Sumitomo Chemical is a major diversified chemical company that produces high-quality polyethylene-based battery separators. Its products are characterized by excellent chemical resistance and uniform pore structure, making them suitable for a wide array of lithium-ion batteries, from small format to large automotive packs.

Innovation and Expansion Initiatives:

• Strategic investments to scale up separator production

• Collaboration with battery makers to develop application-specific solutions

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4️⃣ 7. Entek International

Headquarters: Lebanon, Oregon, USA
Key Offering: Extruded PE separators for lead-acid and lithium-ion batteries

Entek is a leading manufacturer of battery separators, with a strong focus on the North American market. While historically known for lead-acid battery separators, the company has significantly invested in lithium-ion separator technology and is building major manufacturing facilities in the U.S. to support the domestic EV supply chain.

Innovation and Expansion Initiatives:

• Construction of a large-scale Li-ion separator plant in the United States

• Focus on supplying the burgeoning North American EV battery industry

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3️⃣ 8. Evonik Industries AG

Headquarters: Essen, Germany
Key Offering: SEPARION® ceramic separators

Evonik is a global specialty chemicals leader whose SEPARION® brand offers a unique ceramic-based separator technology. These separators provide exceptional thermal stability and safety, making them ideal for demanding applications in automotive and stationary storage batteries, where preventing thermal runaway is paramount.

Innovation and Expansion Initiatives:

• Development of innovative ceramic-coated and non-woven separators

• Strong focus on safety-enhancing technologies for next-generation batteries

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2️⃣ 9. W-Scope Korea Corporation

Headquarters: Chungcheongnam-do, South Korea
Key Offering: Wet-process PE separators

W-Scope is a rapidly growing South Korean manufacturer specializing in polyethylene wet-process separators. The company has become a significant player by focusing on cost-effective production and high quality, supplying major battery producers in Asia and expanding its global reach to meet the explosive demand from the EV sector.

Innovation and Expansion Initiatives:

• Rapid capacity expansion in Korea and planned facilities in Europe

• Investment in R&D for thinner, higher-performance separator films

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1️⃣ 10. Senior Tech

Headquarters: New Taipei City, Taiwan
Key Offering: Battery separators for consumer and power applications

Senior Technology is a key manufacturer of battery separators, particularly strong in the market for consumer electronics. The company has been expanding its product portfolio and capacity to serve the growing power vehicle and energy storage system (ESS) markets, establishing itself as a reliable supplier in the global battery ecosystem.

Innovation and Expansion Initiatives:

• Diversification from consumer electronics to high-growth EV and ESS segments

• Continuous improvement of production processes for enhanced product quality

Get Full Report Here:
Lithium Ion Battery Separators Market – View in Detailed Research Report

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🔋 Outlook: The Future of Battery Separators is Smarter and Safer

The lithium-ion battery separator market is undergoing a profound transformation. As battery energy densities increase and safety requirements become more stringent, separator technology is evolving from a passive component to an active contributor to battery performance and safety.

📈 Key Trends Shaping the Market:

• Shift towards thinner separators to increase energy density without compromising safety

• Rising adoption of ceramic and coated separators for enhanced thermal stability

• Geographic diversification of production to build resilient, localized supply chains, especially in North America and Europe

• Intensive R&D focused on separators compatible with solid-state and silicon-anode batteries

Get Full Report Here:
Lithium Ion Battery Separators Market – View in Detailed Research Report

The companies listed above are not only supplying a critical component—they are enabling the global transition to electrified transportation and renewable energy storage.