Altech Batteries Achieves Groundbreaking 88.5 Percent Retention with Silumina Anodes™ Technology

Altech Batteries Limited (ASX: ATC) has announced a significant advancement in its battery technology with the latest test results confirming an impressive 88.5 percent capacity retention after 500 cycles using its proprietary Silumina Anodes™ product. This milestone marks the strongest battery cycling performance achieved by Altech to date, solidifying its position at the forefront of next-generation lithium-ion anode development.

The Silumina Anodes™ technology introduces a 5 percent addition of spherical alumina-coated silicon to conventional graphite anodes. Silicon has long been recognized for its ability to store nearly ten times more lithium than graphite, yet its tendency to swell during charging has been a barrier to commercial adoption. Altech’s innovation addresses this challenge by coating silicon particles with alumina and forming them into robust spherical shapes. This stabilizes the structure during charge-discharge cycles and prevents degradation.

The result is a dramatic performance improvement, with initial capacities reaching 500 mAh/g and maintaining 420 mAh/g after 500 cycles. By comparison, traditional graphite-only anodes typically degrade to around 230 to 250 mAh/g over the same period. This enhanced stability not only enables longer electric vehicle range and reduced battery size, but also improves energy density, efficiency, and system-level design flexibility across industries.

Altech’s Saxony-based pilot plant has played a pivotal role in scaling the technology, producing consistent batches of high-quality material. The successful replication of results from both the pilot facility and the company’s Perth laboratory demonstrates the maturity and reliability of the manufacturing process.

Managing Director Iggy Tan commented, “These results mark a genuine breakthrough for the battery industry. Achieving 88.5 percent retention at 500 cycles confirms the stability and scalability of our Silumina Anodes™ process.”

With growing demand for higher energy batteries in the electric vehicle, aerospace, and grid storage sectors, Altech’s breakthrough paves the way for broader adoption of silicon in lithium-ion anodes, offering a practical and scalable solution that blends performance with durability.