The Battery Group team indicated during preliminary discussions that they have not yet seen silicon additives deliver such meaningful performance improvements at low rates across the industry.
Traditionally, attempts to integrate silicon into commercial lithium-ion anodes have been challenged by expansion-related degradation, unstable solid electrolyte interphase (SEI) formation, and rapid lifetime decay. The strong performance of Altech’s coated silicon, achieved with only modest silicon loading, was noted as particularly noteworthy. The Battery Group recognized that very few material suppliers worldwide produce silicon additives with this level of stability, consistency and real-world applicability.
This early feedback reinforces the technical advantage and disruptive potential of the Altech process.
The Battery Group has also asked Altech to conduct coating trials on their supplied graphite material to assess the performance impact of integrating Altech’s proprietary alumina technology directly onto their proprietary anode substrate. Under the NDA, the Battery Group sent several kilos of representative graphite samples to Altech’s laboratory in Perth, where Dr. Lazy will apply the company’s coating process and prepare evaluation batches. These coated graphite samples are then returned to the Battery Group for benchmarking against their internal standards, providing a direct comparison of how Altech’s technology improves their preferred graphite formulations.
UPDATE ON LONG CYCLE SILUMINA TESTING
Altech announced a major advancement in its Silumina Anodes(TM) project on October 9, 2025, achieving the strongest battery performance to date for its proprietary alumina-coated spherical silicon anode material. Since that announcement, the latest test results now show an impressive capacity retention of 83% after 1,000 charge-discharge cycles with the addition of 5% Silumina Anodes™ to a standard graphite anode. This represents an important milestone for the Silumina Anodes(TM) technology, confirming both its sustainability and commercial potential. Importantly, such lifetime performance places Altech’s material at the forefront of next-generation silicon-reinforced anode technologies, strengthening its position in the rapidly evolving global battery materials market.
HOW SILUMINA ANODES(TM) ARE MADE
Altech’s spherization process transforms irregular silicon particles into perfectly rounded, aluminum oxide-coated spheres that integrate seamlessly into graphite anodes. The process begins with submicron silicon powders uniformly coated with a nanolayer of high-purity aluminum oxide, which buffers against volume expansion during lithiation. These coated particles are then spherical through a precisely controlled thermal and mechanical process that rounds their geometry (see Figure 1*). When mixed with the graphite matrix, the spherical Silumina AnodesTM particles naturally occupy microscopic cavities, where they can freely expand and contract during cycling without damaging the surrounding structure (see Figure 2*). This optimized configuration reduces mechanical stress, maintains electrode integrity and improves electrical connectivity. With just an addition of 5%, the design achieves a capacity increase of >40% while maintaining exceptional cycle stability during long-term use.
Managing Director of Altech, Iggy Tan, said: “This commitment from the world’s largest battery manufacturer is a powerful validation of our Silumina Anodes(TM) technology. Their early feedback, particularly noting that they have not seen silicon additives do this effectively at such low levels, reinforces the importance of our breakthrough. We are excited to advance this collaboration under the NDA and look forward to demonstrating how Altech’s coating technology can further boost their graphite and anode performance improve.”
*To view tables and figures, go to:
https://abnnewswire.net/lnk/444MKKI0
About Altech Batteries Ltd:
Altech Batteries Limited (ASX:ATC,OTC:ALTHF) (FRA:A3Y) is a specialist battery technology company that has a joint venture agreement with leading German battery institute Fraunhofer IKTS (“Fraunhofer”) to commercialize the revolutionary CERENERGY(R) Sodium Alumina Solid State (SAS) battery. CERENERGY(R) batteries are the breakthrough alternative to lithium-ion batteries. CERENERGY(R) batteries are fire and explosion resistant; have a lifespan of more than 15 years and operate in extremely cold and desert climates. The battery technology uses table salt and is lithium-free; cobalt-free; graphite-free; and copper-free, eliminating exposure to critical metal price increases and supply chain concerns.
The joint venture is commercializing its CERENERGY(R) battery, with plans to build a 100 MWh production facility on Altech’s site in Saxony, Germany. The facility plans to produce CERENERGY(R) battery modules to provide networked storage solutions to the market.
Source:
Altech Batteries Ltd
Contact:
Commercial
Iggy Tan
Director
Altech Batteries Limited
Tel: +61-8-6168-1555
Email: info@altechgroup.com
Martijn Stein
Head of Finance
Altech Batteries Limited
Tel: +61-8-6168-1555
Email: info@altechgroup.com
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