G
GDI
Scalable 100% silicon battery anodes for Li-ion batteries
About GDI
GDI (Graphenix Development Inc.) is a US-based company that develops and manufactures 100% silicon anodes for next-generation lithium-ion batteries. Founded in 2009 by Robert Anstey, the company aims to replace the graphite anodes currently used in most Li-ion batteries. Anstey, who holds a Joint Honors degree in Finance and Economics from McGill University and a Juris Doctor from Northeastern University School of Law, founded the company out of a passion for technologies that can address global problems.
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The company’s core product is a patented 100% silicon anode designed to integrate into existing battery manufacturing processes. This technology addresses key drawbacks of graphite anodes by offering over 30% greater energy density, enabling a 15-minute charge from 10% to 75%, and improving safety. GDI's design uses a continuous, flexible silicon layer which mitigates the swelling and mechanical stress that have traditionally limited the commercial use of silicon in anodes. The company has demonstrated its technology's safety through independent tests, including passing nail penetration tests without thermal runaway. This provides a significant advantage as the market moves towards stricter safety regulations.
GDI's business model is to sell rolls of its silicon anodes directly to battery manufacturers and end-users. This allows clients to enhance their products without needing to invent new manufacturing equipment. The company is targeting a wide range of industries, including electric vehicles (EVs), defense, medical technology, aerospace, and consumer electronics. GDI is positioning itself as a key alternative to the Chinese-dominated graphite supply chain, offering a more geopolitically resilient and domestically sourced material.
The company has secured significant funding and strategic partnerships to scale its production. After initial funding from US government bodies, GDI raised over $20 million in its Series A funding round, co-led by EIT InnoEnergy and Helios Climate Ventures. It also received a €20 million loan from the European Investment Bank (EIB). GDI has established a pilot production facility in Eindhoven, Netherlands, and is building its first manufacturing plant in Lauenförde, Germany, in partnership with AGC Glass Europe and Schlenk SE. The company plans to reach 100 MWh production capacity by 2026 and achieve gigawatt-scale manufacturing by 2030, with initial commercial applications in drones and medical devices expected within 24-30 months, followed by EVs by 2030.
At a glance
- Status
- Operational
- Founded
- 2009
- Headquarters
- Rochester, United States
- Employees
- 201
- Open positions
- None listed
- Dealroom signal
- 82.4/100
- Sub-industry
- Energy Storage, Vehicle Production
- Sector
- Transportation, Biotechnology, Lithium-Ion Batteries, Battery, Chemical, Sustainable Development Goals, EV Battery, Climate Tech, Electric Mobility
- Technology
- Hardware, Deep Tech
- Business model
- Manufacturing
- Client focus
- b2b
Latest news
Press, funding announcements and product moves mentioning GDI.
Funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| LATE VCOther financing | Apr 2026 | $15M | $60M | InnoEnergy · Helios Climate Ventures LLC · W.L. Gore & Associates | ↗ |
| GRANTOther financing | Jul 2025 | $100K | — | US National Science Foundation | ↗ |
Financials
Revenue, earnings and other financial measures where available. Years marked “E” are estimates.
Growth signals
Latest recorded traffic for GDI is 1.7K monthly website visits, down 51.4% over the last three months. GDI's team grew 4.7% over the past year.
Similar companies
Company identity and context are open; selected comparison metrics preview what is available on the platform.
Investors
From Dealroom's funding and investor records, grouped by the round each investor first entered.
Seed9 investors entered at this stage
NYSERDA
Excell Partners
Buffalo Angels
Brian J. Lipke
US Department of Energy
Army SBIR|STTR Program
US Army
US Defense Logistics Agency
US National Science Foundation
Series A6 investors entered at this stage
InnoEnergy
RIT Venture Fund
Helios Climate Ventures LLC
Skyview Ventures
PMH Investments
Rochester Angel Network
Series B and later2 investors entered at this stage
European Investment Bank
W.L. Gore & Associates
Source: Dealroom Talent Intelligence.
Global footprint
team presence
Market sentiment
An AI-synthesised read of the highest-engagement posts about GDI on X, ranked by likes and reposts, corporate channels excluded.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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