Adden Energy, Inc. is a technology company specializing in advanced solid-state battery solutions, with a focus on electric vehicles (EVs) and energy storage systems. Founded by a team of scientists from Harvard University, the company is headquartered in Waltham, Massachusetts. Adden Energy’s mission is to address the challenges of climate change by developing battery technologies that enhance safety, efficiency, and sustainability.
The company’s innovative approach centers on solid-state batteries, which use a solid electrolyte instead of the liquid electrolytes found in traditional lithium-ion batteries. This design improves safety by reducing risks such as leakage and combustion while delivering higher energy density and longer lifespans. Adden Energy’s solutions aim to accelerate the adoption of electric vehicles by addressing critical issues like charging speed, range, and battery longevity.
Supported by significant investments and strategic partnerships, Adden Energy is scaling its technology from research to commercial production. With a strong emphasis on ethical sourcing and sustainability, the company is positioned to play a significant role in the global transition to cleaner energy solutions.
Battery Technology
Adden Energy’s core innovation lies in its all-solid-state pouch cell batteries, which feature lithium metal anodes and high-nickel NMC (Nickel-Manganese-Cobalt) cathodes. This design enables energy densities exceeding 500 Wh/kg, a substantial improvement over conventional lithium-ion batteries. Such high energy density translates to longer driving ranges for electric vehicles, a critical factor for consumer adoption.
One of the standout features of Adden Energy’s technology is its ability to achieve extreme fast charging (XFC) in less than 10 minutes at room temperature. This capability addresses one of the primary barriers to EV adoption—slow charging times. Traditional lithium-ion batteries often require significantly longer charging periods, even at elevated temperatures, making Adden Energy’s solution a game-changer for the industry.
The company’s batteries also excel in low-temperature environments, maintaining conventional charging rates at temperatures below -20°C. This ensures reliable performance across a wide range of climates, making EVs more versatile and practical for drivers in colder regions.
Safety is another area where Adden Energy’s technology shines. The batteries incorporate a self-healing multi-electrolyte separator and a porous 3D lithium metal anode that prevents the formation of dendrites. These twig-like growths can cause short circuits and reduce battery lifespan, posing safety risks in conventional designs. By mitigating this issue, Adden Energy’s batteries maintain high performance over thousands of charge cycles, with lab tests demonstrating capacities exceeding 80% even after 6,000 cycles.
The company is actively working to scale up production, transitioning from laboratory prototypes to commercial-grade batteries. This involves the establishment of a roll-to-roll pilot production facility at its Waltham headquarters, supported by recent funding rounds.
Recent Projects
In 2024, Adden Energy raised $15 million in a Series A funding round led by At One Ventures, with participation from Primavera Capital Group, Rhapsody Venture Partners, and MassVentures. This funding is being used to expand the company’s production capabilities and scale its solid-state battery technology.
Adden Energy has also made strides in developing its roll-to-roll pilot production facility, which aims to increase battery output by 100 times. This facility is a crucial step in bridging the gap between research and commercialization, bringing the company closer to its goal of making its batteries widely available for electric vehicles.
Investors
Adden Energy has secured investments from several prominent venture capital firms. Its seed funding round in 2022 was led by Primavera Capital Group, with participation from Rhapsody Venture Partners and MassVentures. The company’s Series A round in 2024 was led by At One Ventures, with continued support from Primavera Capital Group, Rhapsody Venture Partners, and MassVentures. These investments have provided the financial backing necessary for Adden Energy to advance its technology and scale production.
Business Details
Location: Waltham, Massachusetts
Website: https://addenenergy.com
LinkedIn: https://www.linkedin.com/company/adden-energy/
