Blue Current, a company that develops silicon solid-state batteries, announced more than $80 million in its Series D extension round.
The funding round was led by Amazon, with participation from Koch Disruptive Technologies (KDT), Piedmont Capital, Rusheen Capital Partners, and Allen & Company.
The company develops solid-state batteries using silicon and elastic polymer anodes paired with fully dry electrolytes across multiple formulations. According to the company, its solution is cost-effective, scalable, and can be manufactured at scale using existing lithium-ion battery equipment.
The funding is expected to accelerate the commercialization phase of the company’s silicon composite battery platform to cater to the mobility and stationary energy storage sectors.
“Blue Current has a missionary approach to transforming battery technology, and their talented team is pioneering solid-state batteries that address the need for safe, high-performance, U.S.-based solutions,” said James Hamilton, Amazon Senior Vice President and Distinguished Engineer. “Scaling new battery solutions requires more than lab breakthroughs – and Blue Current’s approach could make solid-state batteries more affordable and accelerate their adoption to meet the growing demand for stationary storage and longer-range electric vehicles with faster charging times. We’re excited to see what they do next.”
In connection with the fundraise, James Hamilton, Amazon Senior Vice President and Distinguished Engineer, is joining Blue Current’s Board of Directors.
According to Mercom’s 9M and Q3 2025 Funding and M&A for Energy Storage report, VC funding in the sector totaled $2.8 billion in 56 deals, a 4% increase YoY compared to $2.7 billion in 61 deals in 9M 2024.
Last year, Ionobell, a silicon battery technology company, raised $3.9 million in a seed extension round led by Dynamo Ventures and Trucks VC, bringing the total seed funding to $7.3 million. The initial equity round was led by Trucks VC, with participation from Dynamo Ventures and Alumni Ventures.
