3 September 2025

Gelion plc

("Gelion", "Company" or the "Group")

Successful Transfer of MPI Technology and Scale-Up of Sulfur CAM Production

Gelion plc (AIM: GELN), the UK-Australian battery technology innovator, is pleased to announce it has successfully transferred and integrated the Max Planck Institute of Colloids and Interfaces (MPI) advanced materials and has successfully fabricated the sulfur cathode active material ("CAM") in its Sydney based ACPC facility. This is a major technical milestone in advancing Gelion's next‑generation Lithium Sulfur (Li-S) and Room Temperature Sodium Battery (Na-S) battery technologies, enabling the Company to expand partner testing, materially de‑risking the pathway to market adoption, whilst giving the Company greater operational control.

Key Highlights

·    Technology transfer and operational control: Successful transfer of proprietary sulfur CAM technology from MPI into Gelion's in‑house operations.

·    Expand partner testing: Commissioning of the fabrication capability in Sydney allows Gelion to support ongoing as well as expand partner testing with intended supply chain partners.

·   Acceleration of collaboration: Higher volumes (compared to MPI) now support multiple concurrent trials and faster feedback cycles.

·    Commercial momentum: Milestone materially de‑risks the pathway to market adoption of Gelion's high‑energy, high power and high longevity sulfur‑based batteries.

Successful completion of MPI technology transfer

Following the strategic collaboration with the MPI announced in March 2025, Gelion has now successfully completed the full transfer of MPI's proprietary sulfur CAM technology into the Company's development and production ecosystem.

This achievement provides Gelion with end‑to‑end capability for fabrication, cell prototyping and testing, as part of the path towards scale‑up, and commercialisation of sulfur CAM for our Li-S and Na-S technologies.

Acceleration of collaboration and feedback cycles

Increased CAM volumes will enable the Company to accelerate its collaborative development programmes, allowing for multiple concurrent partner trials, shorter testing loops, and more rapid incorporation of feedback into product optimisation. These developments are expected to materially reduce technical risk and strengthen the pathway towards broad commercial adoption of sulfur-based battery systems.

John Wood, Gelion CEO commented: "We are very pleased with the progress that has been achieved here working in collaboration with MPI. There has been exceptional commitment shown, including, our research lead spending extended time at MPI to develop understanding and several individuals in our team going well above and beyond to allow for quick progress.  Gelion is making progress with understanding and releasing the potential of this exceptional technology, such as that described in the recent release about the performance of our Li-S and Na-S technology. The increased fabrication capability supports us continuing to step up our internal development activities along with our ability to support ongoing external testing activities.

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About Gelion

Gelion ("gel: ion") is a global energy storage innovator, supporting the transition to a more sustainable economy by commercialising globally important next generation battery technologies: Sulfur based, Lithium-Sulfur (Li-S), Sodium-Sulfur (Na-S) and Zinc-based (Zn) hybrid cells to electrify mobile and stationary applications and battery recycling technology.

Gelion plc (the Group) is listed on the London Stock Exchange's Alternative Investment Market and wholly owns UK based OXLiD Ltd and Battery Minerals Ltd and Australia based Gelion Technologies Pty Ltd.  Gelion is designing and delivering innovative battery technology to enable that transition and return value for its customers and investors.

In addition, Gelion is also delivering commercial Battery Energy Storage Systems (BESS) projects through its Integration Solutions business.

Sulfur Batteries

Gelion's effort is directed at the potential for sulfur-based cathode active materials (CAMs) to deliver low-cost & sustainable batteries with compelling performance. In the case of Li-S batteries, the target is a high-performance light-weight battery for the EV and e-aviation market. In the case of Na-S batteries, the target is an ultra-low-cost advancement on batteries currently employed in the stationary storage and economy EV market. The company's overarching goal is to help make global transport, energy consumption and storage more sustainable.

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