GDI, a global researcher and manufacturer of advanced, patented 100% silicon anode technology for next-generation Li-ion batteries, has completed a major Series A funding round and started pilot production in the Netherlands, enabling the company to play a significant role in battery production and the energy transition.
More energy and faster charging
GDI’s technology uses a unique 100% silicon anode design, which provides 30% higher energy density in advanced Li-ion batteries, and enables safe and reliable charging from 10% to 75% in 15 minutes.
Trial production in Eindhoven
GDI has established a European pilot production plant in Eindhoven, the Netherlands, with a production capacity of 300 kWh, to be operational by the end of 2022. This makes GDI the world leader in production capacity of 100% silicon anodes. With this financing, combined with planned strategic partnerships, GDI expects to scale production to more than 100 MWh in Q1 2024.
The importance of 100% silicon
Silicon is considered the most promising active material in anodes due to its ability to store large amounts of lithium ions, resulting in a battery with a significantly higher energy density than batteries made with conventional graphite-based anodes. While many battery manufacturers use a small amount of silicon (<10%) in their graphite anodes to improve their energy density, the GDI approach delivers much better performance and improved safety over conventional Li-ion designs.
GDI is the first company to solve the three silicon problems that arise when large amounts of silicon are applied to the anode:
- Limited life cycle due to silicon expansion/contraction and delamination,
- Safety issues related to silicon powder over the surface as well as lithium dendrite formation at low temperatures and fast charging,
- Not scalable or likely expensive to produce.
GDI has issued 5 US patents and more than 20 pending patents in various stages. The company has proven the superior performance of its anodes by testing multi-layer pocket cells that can be charged from 10% to 75% in just 15 minutes, more than 60 times in a row, without lithium deposition or failure, without the need for added compression or added lithium like competitors need. Most importantly, the technology is scalable, and GDI produces anodes on industrial solar and glass manufacturing equipment with worldwide applications in volumes of millions of square meters per year.
US funding too
With this American-developed technology, the $13.3 million Series A funding comes in addition to a $3 million government investment from the US Army Research Labs, a Phase II SBIR from the US Department of Energy and the US Department of Energy. US Defense Logistics Bureau.
Not only innovation, production has already started
“In addition to completely replacing silicon with graphite/carbon in Li-ion batteries, we also manage to achieve a good price/performance ratio,” said Robert Anstey, Founder and CEO of GDI. “This is what will make the difference for EV manufacturers and other end users.”
“This funding will help GDI gain a position at the forefront of the high-performance battery market. Advanced silicon anodes accelerate adoption in electric vehicles. In addition, our silicon anodes improve the performance of electronic products worldwide with faster charging times, higher energy density and improved safety.” Josh Grehan, Principle at Helios Climate Ventures.
“GDI’s ability to seamlessly integrate into existing lithium battery architecture and production lines provides significant cost advantages and enables faster time to market. But just as importantly, the use of a silicon anode reduces reliance on traditional materials such as graphite, making the European battery value chain more resilient and increasing domestic volume.[CV-B1] ‘ say Roel van Diepen, Investment Director at EIT InnoEnergythe innovation engine for sustainable energy, supported by the European Institute of Innovation and Technology, a body of the European Union (EU).