REG - Gelion PLC - Gelion Achieves Breakthrough in Li-S Performance

GelionAnnouncement

Tue 07:02

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RNS Number : 9300T  Gelion PLC  05 August 2025

5 August 2025

Gelion plc

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

 

Gelion Achieves Breakthrough in Lithium-Sulfur Performance

Gelion plc (AIM: GELN), the global energy storage innovator, announces a major
milestone in the development of its Lithium-Sulfur (Li-S) battery technology,
demonstrating exceptionally promising performance in initial coin cell tests.

Building on its strategic collaboration with the Max Planck Institute of
Colloids and Interfaces (MPI), announced in March 2025, and the successful
Sodium-Sulfur (Na-S) coin cell results shared on 17 April, Gelion has now also
successfully integrated MPI's advanced materials (Gelion Sulfur Cathode) into
Li-S coin cells, delivering industry-leading results.

Using coin cells, the industry-standard platform for battery testing, the
Company has now demonstrated outstanding power and cycling capabilities using
Gelion's proprietary Sulfur Cathode developed in collaboration with MPI, in
both Na-S and Li-S cells.

Key Initial Results

·      Longer battery life: Li-S coin cells constructed with thin layers
of the Gelion Sulfur Cathode have passed 1,000 cycles under aggressive 1C
testing conditions (One-hour full charge and discharge). Still cycling well
following 1,100 cycles, the cells exhibit remarkable performance:

 

o  Higher energy retention: The cells retain 90% (1490 mAh/g(S)) of
theoretical capacity when cycled at C/10 (10-hour charge and 10-hour
discharge). This provides evidence of the longevity performance required for
application of the Gelion Sulfur Cathode to mass market e-mobility.

o  Higher power performance: The cells display 75% (1240 mAh/g(S)) of
theoretical capacity when discharged at 10 C (6-min discharge). This provides
evidence of the high-power performance required for processes such as vertical
takeoff and landing (VTOL) in drone applications, and fast charge or rapid
acceleration in e-mobility.

The high percentage retention (meaning the percentage sulfur in the cathode
that retains full accessible viability) against theoretical capacity after
significant cycling, and even at high power levels, is a factor of the
stability of the Gelion Sulfur Cathode material and puts Gelion's technology
on track to strong performance/market fit.

Going forward, Gelion will update on activities which focus on using
commercially relevant cathode thicknesses (i.e., high areal capacities),
validating performance parameters necessary for real-world adoption across the
broader energy storage market.

Significant progress toward commercialisation

These findings mark a significant advancement in the commercialisation of Li-S
battery technology, a next-generation alternative to traditional lithium-ion
battery systems. Li-S batteries offer 60% - 70% higher Specific Energy Density
to lithium-ion, with the added benefits of lower cost materials and improved
sustainability. To date, widespread adoption has been hindered by challenges
such as poor cycle life and limited high-rate performance. Gelion's
breakthrough addresses both issues, demonstrating long-term stability and
high-power delivery. This paves the way for Li-S to become a viable solution
for applications ranging from electric vehicles to drones.

Following this advancement, Gelion has now demonstrated outstanding
performance in both Na-S and Li-S coin cells, aimed at a broad range of
applications such as drones, EVTOL aircraft, mass-market electric vehicles,
and Battery Energy Storage System (BESS) solutions.

John Wood, CEO of Gelion said: "These results reflect a pivotal step forward
in unlocking the potential of Li-S batteries. By combining Gelion's technology
and engineering expertise with the world-class research of the Max Planck
Institute of Colloids and Interfaces, we are demonstrating both high power
performance and durability alongside the characteristic high specific energy
of Lithium Sulfur. This positions us strongly on a path to meet the demands of
future mobility and stationary energy storage solutions with a sustainable,
high power, high-capacity, high cycle life, battery technology."

CONTACTS

 Gelion plc                                                                                                                                                                                                via Alma
 John Wood, CEO

Amit Gupta,
 CFO

 Prof. Thomas Maschmeyer (Founder and Director)
 Strand Hanson Limited (Nominated and Financial Adviser)                                                                                                                                                   +44 (0) 20 7409 3494

Christopher Raggett / Rob Patrick
 Oberon Capital (Joint Broker)                                                                                                                                                                             +44 (0) 20 3179 5300
 Nick Lovering / Mike Seabrook / Adam Pollock

 Allenby Capital Limited (Joint Broker)                                                                                                                                                                    +44 (0) 20 3328 5656

 Jos Pinnington / Guy McDougall (Sales and Corporate Broking)

 Alex Brearley / Ashur Joseph (Corporate Finance)
 Alma Strategic Communications (Financial PR)                                                                                                                                                              +44 (0) 20 3405 0205

Justine James / Hannah Campbell / Rose Docherty                                                                                                                                                          gelion@almastrategic.com (mailto:gelion@almastrategic.com)

This announcement contains inside information for the purposes of Article 7 of
EU Regulation No. 596/2014, which forms part of United Kingdom domestic law by
virtue of the European Union (Withdrawal) Act 2018, as amended.

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.

Glossary

 Ah                               Ampere hours. A measure of capacity stored in the cell. The larger the number
                                  the higher the capacity.
 mAh/g(S)                         The unit mAh/g(S) stands for milliampere-hours per gram of Sulfur (with S
                                  indicating "Sulfur"). It is a measure quantifying how many electrons (in mAh)
                                  can be stored per gram of Sulfur.
 Cycle life                       The number of full charge and discharge cycles a battery can complete before
                                  its capacity falls below a specified level, typically 80% of the original
                                  capacity. Higher cycle life indicates longer-lasting performance. According to
                                  standards set by the United States Advanced Battery Consortium LLC (USABC), a
                                  cycle life exceeding 1,000 cycles is essential for transportation applications
                                  and equally critical for stationary energy storage.
 Specific Energy density (Wh/kg)  The ratio of energy stored per unit weight i.e. Watt-hours per kilogram. The
                                  higher the number the lighter the battery.

 

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