The Global Battery Separator Paper Market is a critical component of the modern energy storage ecosystem, projected to grow significantly as demand for lithium-ion batteries surges across electric vehicles, consumer electronics, and grid storage applications. This essential membrane, which prevents short circuits while enabling ion transport, is witnessing rapid technological advancement and capacity expansion from leading global manufacturers.

As the world accelerates its transition to clean energy and electrified transportation, the performance, safety, and cost-effectiveness of battery separators have become paramount. In this comprehensive analysis, we profile the Top 10 Companies in the Battery Separator Paper Industry—pioneers in material science, manufacturing scale, and innovation who are shaping the future of energy storage technology worldwide.

---

🔟 1. Asahi Kasei Corporation

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

Asahi Kasei is a global leader in battery separator technology, renowned for its Hipore™ brand of microporous polyolefin membranes. The company’s wet-process technology produces highly uniform pore structures that deliver exceptional safety and performance characteristics for high-energy-density lithium-ion batteries.

Innovation Initiatives:

• Development of high-heat-resistance separators for automotive applications
• Expansion of production capacity to meet growing EV battery demand
• Research into next-generation separator coatings for enhanced safety

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

---

9️⃣ 2. SK Innovation Co., Ltd.

Headquarters: Seoul, South Korea
Key Offering: Li-ion battery separators for automotive and ESS applications

SK Innovation operates one of the world’s largest lithium-ion battery separator businesses through its subsidiary SK ie technology. The company specializes in both wet-process and coated separators, with significant market share in the premium automotive battery segment.

Innovation Initiatives:

• Development of ceramic-coated separators for enhanced thermal stability
• Global production expansion across Korea, China, and Poland
• Strategic partnerships with major battery manufacturers worldwide

---

8️⃣ 3. Toray Industries, Inc.

Headquarters: Tokyo, Japan
Key Offering: Battery separator films and advanced material solutions

Toray Industries brings decades of material science expertise to the battery separator market, offering high-performance polyolefin-based separators through both wet and dry manufacturing processes. The company’s separators are known for their dimensional stability and consistent quality.

Innovation Initiatives:

• Investment in next-generation nanofiber separator technology
• Development of ultra-thin separators for high-energy-density batteries
• Expansion of production capabilities for electric vehicle applications

---

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

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

Celgard is a pioneer in dry-process battery separator technology, with over 40 years of experience in developing and manufacturing high-performance separator membranes. Now part of Asahi Kasei, Celgard continues to innovate while leveraging global manufacturing and R&D capabilities.

Innovation Initiatives:

• Development of trilayer separator architectures for enhanced safety
• Expansion of ceramic coating capabilities for automotive-grade separators
• Research into separator technologies for next-generation battery chemistries

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

---

6️⃣ 5. UBE Corporation

Headquarters: Tokyo, Japan
Key Offering: Upilex® and Ube Polyimide-based separator solutions

UBE Corporation brings specialized chemical engineering expertise to the battery separator market, with particular strength in high-temperature resistant materials. The company’s polyimide-based separators offer exceptional thermal stability for demanding automotive and industrial applications.

Innovation Initiatives:

• Development of high-porosity separators for fast-charging applications
• Expansion of production capacity for electric vehicle batteries
• Research into advanced coating technologies for improved battery safety

---

5️⃣ 6. Sumitomo Chemical Co., Ltd.

Headquarters: Tokyo, Japan
Key Offering: Wet-process battery separators and advanced materials

Sumitomo Chemical is a major player in the battery materials ecosystem, offering comprehensive separator solutions for various lithium-ion battery applications. The company’s separators are characterized by excellent uniformity and mechanical strength.

Innovation Initiatives:

• Development of high-strength separators for large-format batteries
• Investment in sustainable manufacturing processes
• Collaboration with battery manufacturers on custom separator solutions

---

4️⃣ 7. Entek International

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

Entek International is a leading North American manufacturer of battery separators with strong capabilities in both lead-acid and lithium-ion technologies. The company’s extruded separator technology offers excellent puncture resistance and dimensional stability.

Innovation Initiatives:

• Expansion of lithium-ion separator production capacity in the United States
• Development of specialized separators for energy storage systems
• Investment in recycling-compatible separator materials

---

3️⃣ 8. Evonik Industries AG

Headquarters: Essen, Germany
Key Offering: Specialty separators and separator coating technologies

Evonik brings advanced materials science to the battery separator market, with particular expertise in separator coatings and specialty polymers. The company’s solutions enhance safety and performance through innovative surface modification technologies.

Innovation Initiatives:

• Development of ceramic and polymer-based separator coatings
• Research into solid-state battery separator technologies
• Partnerships with European battery cell manufacturers

---

2️⃣ 9. Mitsubishi Plastics, Inc. (Now Mitsubishi Chemical Corporation)

Headquarters: Tokyo, Japan
Key Offering: High-performance battery separator films and materials

As part of Mitsubishi Chemical Corporation, this business unit offers advanced separator solutions leveraging the group’s extensive polymer science capabilities. The company focuses on high-reliability separators for automotive and premium consumer applications.

Innovation Initiatives:

• Development of multi-layer separator structures for enhanced safety
• Expansion of production capacity for electric vehicle batteries
• Research into sustainable separator materials and manufacturing processes

---

1️⃣ 10. W-Scope Corporation

Headquarters: Tokyo, Japan
Key Offering: Wet-process separators for high-capacity lithium-ion batteries

W-Scope has emerged as a significant player in the battery separator market, with rapid capacity expansion to meet growing demand from electric vehicle and energy storage system manufacturers. The company specializes in high-porosity wet-process separators.

Innovation Initiatives:

• Aggressive capacity expansion across Japan and Southeast Asia
• Development of cost-competitive separator solutions for mass-market EVs
• Investment in advanced coating technologies for performance enhancement

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

---

🔋 Outlook: The Future of Battery Separator Technology Is Smarter and Safer

The battery separator market is undergoing rapid transformation as energy density requirements increase and safety standards become more stringent. While traditional polyolefin separators continue to dominate, the industry is investing heavily in advanced coatings, new materials, and smart separator technologies that can enable next-generation battery performance.

⚡ Key Trends Shaping the Market:

• Shift toward thinner separators with higher porosity for increased energy density
• Growing adoption of ceramic and other advanced coatings for enhanced thermal stability
• Development of functional separators with built-in safety mechanisms
• Expansion of production capacity to support electric vehicle manufacturing growth

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

The companies profiled above are not only supplying essential components for today’s batteries—they’re developing the foundational technologies that will power the clean energy transition for decades to come.