Adden Energy

Adden Energy, a Waltham-based technology company founded by Harvard scientists, specializes in advanced solid-state battery solutions for electric vehicles. Their solid-state design uses lithium-metal anodes and high-nickel NMC cathodes to deliver higher energy density, faster charging, and improved safety. The company is scaling production via a roll-to-roll pilot facility, aiming to enhance the accessibility and sustainability of EV battery technology.

Company Location

Country:

United States

City:

Waltham, Massachusetts

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Company Overview

Adden Energy, Inc. is a technology company specializing in advanced solid-state battery solutions for electric vehicles and energy storage systems. Founded by scientists from Harvard University, it is headquartered in Waltham, Massachusetts. The company’s mission is to tackle climate change challenges by developing safer, more efficient and sustainable battery technologies.

Battery Technology

Adden Energy’s core technology is its all-solid-state pouch cell batteries using lithium metal anodes and high-nickel NMC cathodes, achieving energy densities above 500 Wh/kg. Their batteries enable extreme fast charging in under 10 minutes at room temperature and maintain charging performance below -20°C. Safety is enhanced by a self-healing multi-electrolyte separator and porous 3D lithium metal anode preventing dendrite formation, supporting over 6,000 charge cycles at above 80% capacity.

Products

The company produces all-solid-state pouch cell batteries featuring lithium metal anodes and high-nickel NMC cathodes with high energy density, extreme fast charging (XFC), and robust low-temperature performance. They are designed to offer longer EV driving ranges and enhanced safety over traditional lithium-ion batteries.

Recent Projects

In 2024, Adden Energy raised $15 million in a Series A round led by At One Ventures to expand production and scale their solid-state battery technology. They are developing a roll-to-roll pilot production facility at Waltham, aiming to increase battery output by 100 times, accelerating commercialization.

Investors

Adden Energy has secured a Series A investment from At One Ventures in 2024, alongside backing from Primavera Capital Group and Rhapsody Venture Partners. MassVentures initially led the seed round in 2022 and continues its support. These funds are designated to scale production and advance technology development.

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