Fuel cell power density record broken by Siltrax to enable high-performance clean transport and aviation

Siltrax, a pioneering company in fuel-cell innovation, has announced that it has achieved the highest recorded volumetric and gravimetric power densities for hydrogen fuel cells. 

Independent third-party testing conducted by TÜV Rheinland validated Siltrax’s proprietary 150kW G-100 fuel cell, which delivered 9.77 kW/L volumetric and 9.7 kW/kg gravimetric power density, surpassing known industry records. 

This breakthrough enables the development of lighter, more compact, and more efficient fuel cells poised to accelerate the decarbonisation of industries where space and weight are critical, such as electric aircraft, heavy-duty trucks and shipping.

Image ©Siltrax

At the core of the achievement is Siltrax’s patented silicon-based, fuel cell architecture. By integrating a world-first, silicon bipolar plate (Si-BPP) and a micro-flow channel design, previously unachievable with conventional materials, Siltrax has enabled higher power output from fewer materials. This represents a crucial step toward scaling fuel-cell adoption in weight- and space-constrained markets.

Dr Zhengrong Shi, founder of Siltrax, said: “Our latest results showed a 30 per cent performance gain over the best industry benchmarks, underscoring the extreme benefits of our silicon BPP and micro-channel designs. This breakthrough translates directly into more power-dense, more reliable, and more cost-effective fuel cells by extracting more power from fewer materials.”

The performance milestone underscores the strength of the company’s core innovation: its proprietary bipolar plate and precision-engineered flow channels. Notably, the achievement was made using only commercially available components – highlighting the significant untapped potential still ahead.

Daniel Zafir, Director of Global Partnerships at Siltrax, added: “These numbers represent just the beginning – by integrating customised gas diffusion layers and membranes tailored to our high-precision architecture, we see significant additional performance gains on the horizon.”

While traditional hydrogen fuel cell systems often fall short of the performance required for demanding applications, Siltrax’s G-100 appears to have set a new benchmark. The results not only exceed long-term international performance targets but also redefine what is possible in next-generation zero-emission mobility and power systems.

For more information, visit www.siltrax.net.