Coulomb Technology is pioneering the next generation of energy storage with sodium-ion batteries that are fire-safe, durable, and environmentally sustainable.
By moving beyond lithium, we reduce dependence on critical foreign minerals and promote domestic manufacturing to strengthen U.S. energy security.
Our innovative battery technology delivers reliable, cost-effective, and eco-friendly power solutions for applications ranging from renewable energy integration to electric mobility, supporting a cleaner, safer, and more self-reliant energy future.
Coulomb Technology is developing next-generation sodium-ion batteries that are fire-safe, durable, and sustainably manufactured in the United States.
Our mission is to create an energy storage solution that eliminates dependence on critical and geopolitically constrained lithium and cobalt resources. The global battery market is dominated by lithium-ion technology, which faces major challenges including fire hazards, high costs, limited raw material availability, and significant environmental and ethical concerns associated with mining.
These issues pose serious risks to both supply chain resilience and sustainability as energy demand grows worldwide. Our sodium-ion batteries use abundant, low-cost, and domestically available materials, offering a truly homegrown alternative that ensures energy independence and national security.
Unlike lithium-based systems, sodium-ion batteries are inherently non-flammable and can operate safely in extreme conditions, making them ideal for stationary storage, renewable integration, and defense applications.
By focusing on local sourcing and manufacturing, Coulomb Technology not only supports the clean energy transition but also strengthens domestic production capacity, reduces carbon emissions, and promotes circular economy practices. Our goal is to power a safer, cleaner, and more self-reliant future for America.
Founders & Expertise
Coulomb Technology was founded by a dynamic duo with complementary skills in business leadership and technical innovation.
- Tim Vosburgh – Co-founder & CEO
Seasoned business leader with an MBA and over 35 years of experience, including high-volume manufacturing leadership at Apple Flextronics and running a previous successful startup. - Subathra – Co-founder & CTO
Brings 23 years of expertise in process design and battery R&D, with a focus on sustainable and scalable energy storage technologies.
Together, they have witnessed firsthand the environmental and ethical impacts of lithium and cobalt mining, inspiring their mission to develop safer, alternative battery chemistries.
Coulomb’s team is supported by a strong cadre of PhD scientists and materials researchers, and operates in collaboration with Oak Ridge and ORNL National Labs, as well as academic and industry partners. With deep technical expertise, operational experience, and collaborative networks, Coulomb Technology is uniquely positioned to advance fire-safe, durable, and domestically manufactured sodium-ion batteries that redefine sustainable energy storage.
Coulomb Technology’s go-to-market strategy focuses on deploying sodium-ion batteries in defense, marine, and stationary energy storage markets where safety, reliability, and domestic sourcing are mission-critical.
Key Initiatives & Partnerships
- Government Pilot Projects
Entering the market through strategic initiatives, leveraging our SBIR award with the U.S. Navy and ongoing discussions with the U.S. Air Force for a 1 MWh system deployment. These provide field validation, performance credibility, and customer feedback. - Target Markets
Parallel focus on renewable microgrids, healthcare facilities, and data centers seeking fire-safe, non-lithium alternatives for backup and load-balancing. - Commercialization Approach
Includes strategic OEM and integrator partnerships, collaborations with utilities, system installers, and government agencies to integrate battery systems into existing infrastructure. - Supply Chain Development
Actively building partnerships with domestic material suppliers, cell manufacturers, and R&D labs to strengthen U.S.-based supply chain and accelerate pilot manufacturing. Collaborations with universities and testing centers for performance validation and certification.
Through these partnerships, Coulomb aims to establish itself as the leading provider of safe, sustainable, and domestically produced sodium-ion battery systems, serving both public and private sectors.
Coulomb Technology will generate revenue through a combination of battery system sales, licensing, and strategic pilot deployments.
Revenue Streams
- Primary Sales
Selling modular sodium-ion battery packs and integrated energy storage systems for defense, marine, microgrid, and healthcare applications. Offered in scalable configurations from 100 kWh to multi-MWh setups. - Short-Term Projects
Early revenue from pilot projects funded through SBIR contracts and defense collaborations. - Expansion Strategy
As production scales, expand to direct sales and OEM partnerships with renewable developers, microgrid integrators, and equipment manufacturers.
Investment Opportunity
Coulomb Technology is seeking $5 million in seed funding to scale pilot production, complete certifications, and accelerate commercialization of our sodium-ion battery systems.
The funding will establish a pilot manufacturing facility in the U.S., optimize our cell assembly line, and expand R&D and testing capabilities for higher energy density and cycle life improvements.
Use of Proceeds
| Allocation | Percentage | Purpose |
|---|---|---|
| Equipment & Automation | 40% | Acquisition and automation for electrode and cell manufacturing. |
| Certification & Validation | 30% | UL9540, UL1973 certifications; field validation and deployment of pilot systems for defense and stationary markets. |
| Team Expansion | 20% | Hiring skilled engineers, supply chain specialists, and sales talent to strengthen commercialization pipeline. |
| Operations | 10% | Working capital and operational expenses. |
In parallel, we are seeking strategic partners in manufacturing, defense, and renewable integration to co-develop and validate large-scale systems. Investor support will accelerate from prototype to market-ready production, expand domestic battery manufacturing, and capture growing demand for safe, sustainable, lithium-free energy storage.
Coulomb Technology has reached Technology Readiness Level (TRL) 7, demonstrating system prototype performance in operational environments.
Our sodium-ion batteries have been successfully validated for energy density, thermal stability, and cycle life, showing strong potential as a safer alternative to lithium-based systems.
We recently secured an SBIR award from the U.S. Navy to pilot our sodium-ion batteries for marine energy storage applications, marking a major milestone in defense-related validation.
Additionally, we are actively discussing a 1 MWh system deployment with the U.S. Air Force, aimed at demonstrating large-scale grid and microgrid capabilities.
To date, Coulomb has raised over $2.2 million in non-dilutive funding through grants such as Innovation Crossroads (Oak Ridge National Laboratory), CalSEED (California), and the New Jersey Seed Grant, along with participation in leading accelerator programs like BRITE Energy Innovators, CleanTech Open, ChargeUp, and SPARK Cleantech.
Our next milestones include scaling pilot manufacturing, achieving UL9540/1973 certification, and integrating our batteries into commercial stationary systems. With proven technical performance, growing federal validation, and strong partnerships, Coulomb Technology is positioned to deliver domestically made, fire-safe sodium-ion batteries that redefine the future of sustainable energy storage.
Coulomb Technology has raised approximately $2.2 million in non-dilutive grants through various programs.
Funding Sources
| Program | Description |
|---|---|
| DOE LEEP Innovation Crossroads Program | At Oak Ridge National Laboratory. |
| New Jersey Seed Grant | State-level support for seed-stage innovation. |
| CalSEED | From California, focused on clean energy startups. |
We are also proud participants of leading clean energy accelerators, including NSF i-Corps, DOE Cradle to Commerce program from Berkeley and Argonne National Labs, CleanTech Open, ChargeUp Accelerator, BRITE Energy Innovators, and SPARK Cleantech Accelerator Program, which have collectively supported the advancement and commercialization of our sodium-ion battery technology.
