# Adden Energy

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/adden-energy

- Industry: Energy Storage & Batteries
- Headquarters: Waltham, US
- Website: www.addenenergy.com
- Total disclosed funding: $20M
- Latest round: Series A (Aug 30, 2024)
- Investors on record: 4

## About

Founded in 2021 and based in Massachusetts, the US, Adden Energy, Inc., a spin-off from Harvard University, operates as a developer of lithium-ion battery technology that enables mass adoption of EVs around the world and clean energy storage. In September 2022, Adden Energy, Inc. raised USD 5.15 million in Seed funding from Primavera Capital, Rhapsody Venture Partners, and MassVentures. Xin Li, William Fitzhugh (CEO), Luhan Ye (CTO), and Fred Hu are the co-founders of the company. In October 2024, Adden Energy, Inc. raised USD 15 million in series A funding led by new investor At One Ventures, with participation from returning investors MassVentures, Primavera Capital, and Rhapsody Venture Partners.


The company is developing and scaling up a brand-new type of solid-state battery with demonstrated charge speeds as low as 3 minutes and capacity retention for over 10,000 cycles in a lab-scale cell. The firm is also developing technology that enables EVs all over the world and contributes to a cleaner future.

## Funding rounds

- Series A, Aug 30, 2024, $15M — MassVentures, Primavera Capital Group, Rhapsody Venture Partners, At One Ventures
- Seed, Feb 14, 2022, $5.2M — MassVentures, Primavera Capital Group, Rhapsody Venture Partners

## Investors

- MassVentures (https://capitalatlas.ai/funds/massventures) — Seed, Series A
- Primavera Capital Group (https://capitalatlas.ai/funds/primavera-capital-group) — Seed, Series A
- Rhapsody Venture Partners (https://capitalatlas.ai/funds/rhapsody-venture-partners) — Seed, Series A
- At One Ventures (https://capitalatlas.ai/funds/at-one-ventures) — Series A