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Gelion Achieves Key Industry Technical Milestone
Gelion plc has achieved a significant technical milestone by reaching a 4Q areal capacity of approximately 4 mAh/cm² in coin cells with its proprietary cathode active material, Gelion CAM. This breakthrough demonstrates the material's ability to form stable, thicker electrodes, a critical step towards developing high-energy-density sulfur-based batteries for applications like e-aviation and electric mobility. The company's results indicate that Gelion CAM can overcome historical limitations of sulfur loading degradation, supporting higher energy per square centimetre and electrode robustness, which is essential for competitiveness with conventional lithium-ion technology. Disclaimer*
About this update from Gelion Plc
[{"type":"text","content":"\n\n\n4 December 2025\nGelion plc (\"Gelion\", the \"Company\" or the \"Group\")\n Technical Breakthrough: Gelion Achieves Target Areal Capacity\nGelion Advanced Sulfur Cathodes Reach Key Industry Milestone in Coin Cells\nGelion plc (AIM: GELN), the global energy storage innovator, has achieved a major technical milestone in the development of its next-generation sulfur battery technology. This achievement marks a major step forward in Gelion's roadmap to delivering high-energy-density, low-cost sulfur-based batteries suitable for e-aviation, electric mobility, stationary storage, and other commercial applications.\nIn this next phase of development, Gelion confirms that its proprietary cathode active material (\"Gelion CAM\") has crossed the 4Q threshold demonstrating stable cycling with the industry recognised 4Q areal capacity (~4 mAh/cm²) in coin cells, the industry standard platform for evaluating new battery materials. Achieving 4Q is widely regarded as a key milestone for high energy density sulfur cathodes. This demonstrates that Gelion CAM can be processed into thicker, high structural integrity electrodes which provide a critical step towards high energy density performance in large format pouch cells. This is a critical enabler for scaling sulfur-based technology toward commercial grade battery systems.\nBuilding on the successful technology transfer from the Max Planck Institute of Colloids and Interfaces (MPI) and the Gelion CAM scale-up announced in September 2025, recent electrode development work shows that Gelion's proprietary material can maintain mechanical stability and controlled porosity even at increased thickness. Achieving these properties is critical to reaching industrially relevant high-areal-capacity electrodes and represents an important benchmark for competitiveness with conventional lithium-ion technology.\nHistorically, increasing sulfur loading in battery electrodes has been limited by rapid degradation of thicker electrodes. Gelion's results indicate that its CAM can overcome these limitations, supporting higher energy per square centimetre while maintaining electrode robustness, a key pathway toward smaller, lighter, and higher-energy battery cells.\nAchieving 4Q areal capacity is a core technical requirement for large-format Li-S and Na-S cells and directly supports Gelion's energy-densi...