How big is the lithium-ion battery separator market | Global Analysis & Key Drivers 2025

How big is the Lithium-Ion Battery Separator Market?

The market is expanding due to increasing demand for electric vehicles, growth in energy storage systems, and advancements in separator materials enhancing battery safety and performance.

Key Growth Drivers of the Lithium-Ion Battery Separator Market

• Surge in EV production requiring high-performance, thermally stable separators
• Growth of renewable energy storage installations integrating lithium-ion batteries
• Development of advanced materials with improved porosity and shutdown features
• Rising investments in localized battery component manufacturing
• Growing emphasis on battery safety and prevention of thermal runaway incidents

Lithium-Ion Battery Separator Market Trends

Lithium-ion battery separator market is witnessing trends like adoption of ceramic-coated separators for enhanced thermal stability, increasing use of multilayer polyolefin separators to improve durability, and scaling of wet-process manufacturing for higher quality control. Use of thinner separators is also moving toward enhancing energy density with safety. Joining partnership between separator manufacturers and battery OEMs is increasing to cater product specification and next-generation battery chemistries.

Emerging Developments in the Lithium-Ion Battery Separator Market

Lithium-ion battery separator market is experiencing developments such as the introduction of ultra-thin separators for solid-state and high-energy-density applications, expansion of production capacity in Asia-Pacific and North America, and innovations in eco-friendly separator manufacturing processes. There is an improvement of sustainability in the form of companies exploring bio-based, recyclable separator materials. Interesting partnerships between material suppliers, separator and battery manufacturers are on the increase to fast-track commercialization of next-generation solutions.

List of Leading Companies in the Lithium-Ion Battery Separator Market

Below is a comprehensive list of the leading market players driving growth in this sector:

1. Asahi Kasei Corporation

Asahi Kasei produces advanced lithium-ion battery separators under its Hiporeâ„¢ brand, known for high porosity, uniform thickness, and superior thermal stability in EV and ESS applications.

2. Toray Industries, Inc.

Toray manufactures lithium-ion battery separators with enhanced heat resistance and dimensional stability, serving electric vehicle, consumer electronics, and industrial energy storage markets globally.

3. SK ie Technology Co., Ltd. (SKIET)

SKIET develops premium wet-process battery separators offering high safety and efficiency, targeting major EV battery manufacturers across Asia, Europe, and North America.

4. Celgard, LLC

Celgard specializes in dry-process lithium-ion battery separators with excellent chemical stability, supplying high-performance products for automotive, industrial, and portable electronics markets.

5. Sumitomo Chemical Co., Ltd.

Sumitomo Chemical produces polyolefin-based lithium-ion battery separators designed for superior safety, durability, and ionic conductivity in high-energy and high-power battery systems.

6. W-SCOPE Corporation

W-SCOPE manufactures microporous lithium-ion battery separators, focusing on lightweight, high-strength, and heat-resistant designs for electric vehicles and renewable energy storage solutions.

7. UBE Corporation

UBE produces lithium-ion battery separators with high mechanical strength and thermal stability, catering to EV, industrial, and consumer battery applications worldwide.

8. Entek International LLC

Entek develops wet-process lithium-ion battery separators with enhanced porosity and safety, supplying global automotive and energy storage system manufacturers.

9. Shanghai Energy New Materials Technology Co., Ltd. (SEMCORP)

SEMCORP is a leading producer of lithium-ion battery separators, offering large-scale manufacturing for EV and ESS markets with consistent quality and safety standards.

10. Teijin Limited

Teijin produces lithium-ion battery separators with advanced coating technologies, enhancing thermal shutdown properties and dimensional stability for high-performance battery systems.

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