The Global Flow Battery Felt Market was valued at US$ 212.7 Million in 2024 and is projected to reach US$ 487.3 Million by 2030, growing at a Compound Annual Growth Rate (CAGR) of 14.8% during the forecast period (2024–2030). This robust growth is primarily driven by the global transition to renewable energy, the urgent need for large-scale, long-duration energy storage solutions, and substantial government investments in grid modernization and decarbonization initiatives worldwide.

As the energy storage sector pivots towards more sustainable and scalable technologies, the critical role of the electrode material—carbon felt—comes into sharp focus. This specialized material is the heart of the flow battery, dictating its efficiency, power density, and lifespan. In this blog, we profile the Top 10 Companies in the Flow Battery Felt Industry—specialized carbon manufacturers and material science innovators who are enabling the next generation of reliable energy storage.

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🔟 1. SGL Carbon

Headquarters: Wiesbaden, Germany
Key Offering: SIGRACELL® Flexible Graphite Felt, SIGRACELL® Rigid Graphite Felt

SGL Carbon is a global leader in carbon-based solutions and a pivotal supplier of high-performance graphite felts for flow batteries. Their SIGRACELL® product line is specifically engineered to offer excellent electrical conductivity, high chemical resistance, and optimal porosity, making them ideal for vanadium and other chemistries. The company works closely with major flow battery system integrators globally.

Innovation & Growth Initiatives:

• Development of advanced felt grades for higher power density and cycle life
• Strategic partnerships with leading flow battery OEMs in North America and Asia
• Continuous R&D investment to reduce production costs and enhance material performance

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9️⃣ 2. AvCarb Material Solutions

Headquarters: Lowell, Massachusetts, USA
Key Offering: AvCarb Flow Battery Electrode Materials (Flexible & Rigid Felts)

AvCarb, a subsidiary of Ballard Power Systems, is a prominent US-based manufacturer of carbon fiber-based materials. Their flow battery electrodes are known for their tailored pore structure and surface properties, which are critical for efficient electrochemical reactions. AvCarb serves a global clientele and is deeply integrated into the North American energy storage ecosystem.

Innovation & Growth Initiatives:

• Focus on material customization for specific flow battery chemistries (VRFB, Zn-Br)
• Active participation in US Department of Energy-funded storage projects
• Scaling production capacity to meet escalating demand from utility-scale projects

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8️⃣ 3. Cetech Co., Ltd. (CGT Carbon GmbH)

Headquarters: Cheongju, South Korea (CGT Carbon: Willich, Germany)
Key Offering: Graphite Felt, Carbon Felt for Flow Batteries

Cetech, through its German subsidiary CGT Carbon, is a key Asian player with a strong European presence. The company specializes in the production of carbon and graphite felts using advanced processing technologies. Their materials are characterized by high purity and consistent quality, making them a preferred supplier for several European and Asian flow battery manufacturers.

Innovation & Growth Initiatives:

• Expansion of graphite felt production lines to cater to the booming energy storage market
• Investment in surface treatment technologies to enhance electrochemical activity
• Establishing a robust supply chain linking Asian production with global markets

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7️⃣ 4. Sinotek Materials (Beijing Sanye Carbon Co., Ltd.)

Headquarters: Beijing, China
Key Offering: Graphite Felts (Soft and Hard), Carbon Felt Substrates

Sinotek Materials is a major Chinese manufacturer of carbon and graphite products, including a comprehensive range of felts for the flow battery industry. Benefiting from China’s massive push for renewable energy storage, the company has become a critical domestic supplier and is expanding its international footprint with cost-competitive, high-volume production capabilities.

Innovation & Growth Initiatives:

• Leveraging China’s dominant position in graphite supply chains for cost leadership
• Collaboration with Chinese flow battery giants like Rongke Power and PuNeng Energy
• R&D focused on improving the durability and efficiency of felt materials

Download FREE Sample Report:
Global Flow Battery Felt Market – View in Detailed Research Report

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6️⃣ 5. CFC Carbon Co., Ltd.

Headquarters: Cheonan, South Korea
Key Offering: Carbon Felt, Graphite Felt for Electrochemical Applications

CFC Carbon is a specialized South Korean producer of carbon and graphite materials. The company has developed significant expertise in creating felts that balance mechanical strength with electrochemical performance. Their products are widely used in various industrial applications, with a growing focus on serving the energy storage sector, particularly in the Asia-Pacific region.

Innovation & Growth Initiatives:

• Development of multi-layer felt structures for optimized fluid dynamics and reactivity
• Targeting emerging flow battery markets in Southeast Asia and Australia
• Investment in automated production to ensure high quality and batch consistency

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5️⃣ 6. Gelon LIB Group

Headquarters: Qingdao, China
Key Offering: Carbon Felt for Energy Storage, Graphitized Felt

Gelon LIB Group, traditionally known for lithium-ion battery materials, has expanded into the flow battery segment. The company produces carbon felts that serve as a cost-effective alternative to fully graphitized felts for certain flow battery designs. Their extensive experience in carbon material science provides a strong foundation for innovation in this adjacent field.

Innovation & Growth Initiatives:

• Cross-pollination of material science expertise from LiB to flow battery technologies
• Focus on scalable manufacturing processes to drive down the cost of flow battery systems
• Strategic positioning to serve both domestic Chinese and export markets

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4️⃣ 7. Kureha Corporation

Headquarters: Tokyo, Japan
Key Offering: Carbon Alloy Felt, Specialty Graphite Products

Kureha Corporation is a leading Japanese chemical company with a strong portfolio of advanced carbon materials. While historically focused on other sectors, Kureha’s expertise in carbon technology positions it as a potential significant entrant and innovator in the flow battery felt market. Their research into carbon alloys and novel composites could lead to next-generation electrode materials.

Innovation & Growth Initiatives:

• Exploration of novel carbon composite materials for enhanced battery performance
• Leveraging strong R&D capabilities to develop proprietary felt formulations
• Potential partnerships with Japanese technology firms developing flow batteries

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3️⃣ 8. Morgan Advanced Materials

Headquarters: Windsor, United Kingdom
Key Offering: Specialty Graphites, Carbon Composites

Morgan Advanced Materials possesses deep-rooted expertise in carbon and graphite manufacturing. The company’s technical prowess in creating materials for extreme environments makes it a capable supplier for the demanding requirements of flow battery electrodes. While not exclusively focused on felts, their material science capabilities allow for custom solutions for battery developers.

Innovation & Growth Initiatives:

• Application of aerospace and industrial grade carbon technology to energy storage
• Development of high-purity, high-temperature graphitization processes
• Collaborating on bespoke material solutions for leading-edge flow battery projects

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2️⃣ 9. Shanghai Hongfeng Carbon Material Co., Ltd.

Headquarters: Shanghai, China
Key Offering: Carbon Fiber Felt, Graphite Felt

Shanghai Hongfeng is a specialized Chinese manufacturer focused on carbon fiber and graphite-based products. The company produces a range of felts used in high-temperature industrial applications, with a growing product line dedicated to the electrochemical market, including flow batteries. They are a key supplier within China’s rapidly expanding domestic supply chain.

Innovation & Growth Initiatives:

• Scaling up production to meet the demands of China’s national energy storage targets
• Cost-optimization of felt production to make flow batteries more economically viable
• Improving the mechanical resilience of felts for long-duration cycling

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1️⃣ 10. Toyobo Co., Ltd.

Headquarters: Osaka, Japan
Key Offering: Dialytic Membrane Materials, Advanced Functional Materials

Toyobo is a renowned Japanese chemical and textile company. While famous for its ion-exchange membranes crucial for flow batteries, the company’s advanced material science expertise also extends to fibrous carbon structures. Their understanding of the entire flow battery system gives them unique insight into the optimal properties required for high-performance electrode felts.

Innovation & Growth Initiatives:

• Holistic approach to flow battery component development (membranes + electrodes)
• R&D into integrated material systems for improved battery efficiency and lifetime
• Leveraging polymer science to develop novel fiber precursors for advanced felts

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Global Flow Battery Felt Market – View in Detailed Research Report

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🌍 Outlook: The Future of Flow Battery Felt is High-Performance and Cost-Effective

The flow battery felt market is undergoing a significant transformation. While performance remains paramount, the intense focus is now on achieving cost reduction through innovative manufacturing processes and material science breakthroughs to make long-duration energy storage accessible on a global scale.

📈 Key Trends Shaping the Market:

• Accelerated demand driven by gigawatt-hour-scale flow battery deployments for grid storage
• Intense R&D into surface modification and activation techniques to boost electrochemical activity
• Vertical integration by flow battery OEMs to secure supply chains for critical materials like felt
• Growing emphasis on recyclability and end-of-life management of carbon felt components

The companies listed above are not just supplying a critical component; they are enabling the stability of future renewable grids by providing the core materials for durable, safe, and scalable energy storage.

Get Full Report Here:
Global Flow Battery Felt Market – View in Detailed Research Report