Adden Energy
Adden Energy is a Harvard spinout developing self-healing solid-state lithium-metal batteries targeting 3-minute charging and million-mile lifetime for automotive OEMs, with secondary applications in drones, data centers, and AI-driven mobility. The company is pre-commercial with ~$20M raised.
- Company typePrivate
- Founded2021
- HeadquartersWaltham, United States
- Headcount1–10
- GTM typeB2B
- OfferingHardware or Manufacturing
What Adden Energy does
Adden Energy is a privately held, Harvard University spinout founded in 2021 and headquartered in Waltham, Massachusetts. The company is developing dynamically-stable, self-healing solid-state lithium-metal batteries based on the Dynamic Stability phenomenon originally discovered by its founding research team at Harvard University over nearly a decade of academic work, with results published in Nature, Nature Materials, Advanced Energy Materials, and Energy and Environmental Science. The technology centers on self-healing solid-state separators combined with a porous lithium metal anode, enhanced cathode, and advanced cell structure, targeting approximately 3-minute charging, million-mile lifetime, longer driving range than internal combustion vehicles, and 100% non-flammable components.
The company's commercial focus is on supplying battery cells to automotive OEMs for electric vehicles, trucks, and vans, with secondary applications identified in commercial drones, data center backup power, and AI-driven robotics and mobility. Adden Energy pursues an enterprise field sales motion, with its website explicitly inviting automakers to "Lead the electric transition" and a waitlist signup as the primary demand capture mechanism. The business model anticipates revenue from direct hardware sales of battery cells to OEMs, with the potential for technology licensing given its expansive patent families and Harvard IP origins.
As of the data provided, Adden Energy has raised approximately $20.15 million in aggregate funding across a $5.15 million seed round in 2022 led by Primavera Capital Group and a $15 million Series A in October 2024 led by At One Ventures, with participation from MassVentures and Rhapsody Venture Partners. The company operates with 1-10 employees and remains pre-commercialization, with no publicly disclosed customers, pricing, or revenue. Senior leadership is led by co-founder and CEO William Fitzhugh (PhD) and co-founder and CTO Luhan Ye (PhD), supported by COO In Kim, CPO Pu Zhang, and VP Business Development Kimberly Branson, with board representation from co-founder Fred Hu and directors Knudt Flor, Bernard Lupien, and observers from the investor base.
Adden Energy firmographics
Firmographics- Name
- Adden Energy
- Legal name
- Adden Energy Inc
- Website
- https://addenenergy.com
- Company type
- Private
- Founded year
- 2021
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Adden Energy is a Harvard spinout developing self-healing solid-state lithium-metal batteries targeting 3-minute charging and million-mile lifetime for automotive OEMs, with secondary applications in drones, data centers, and AI-driven mobility. The company is pre-commercial with ~$20M raised.
- Ownership category
- akta.pro rank
Adden Energy industry classification
Industry- Product category
- Solid-State Lithium-Metal Batteries
- NAICS
- Battery Manufacturing (33591), Battery Manufacturing (335910)
- SIC
- Electronic & Other Electrical Equipment (No Computer Equip) (3600)
- akta.pro primary industry
- Battery Cells (Li-ion, LFP, Sodium-ion, Lead-acid, NiMH) (IMAGAHAA)
- akta.pro secondary industry
- Solid-State Battery Materials & Cell Manufacturing (EUAFABAH)
Keywords
Where Adden Energy is headquartered
LocationHeadquarters
- HQ city
- Waltham
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Adden Energy business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Personnel, Operations, Infrastructure, Supply Chain
Revenue model
- Battery Cell Sales: Adden Energy generates revenue through the sale of solid-state lithium-metal battery cells to automakers and industrial customers. The company is scaling up production to supply EV batteries that can be integrated into electric vehicles, trucks, vans, drones, and other AI-driven mobility applications.
- Technology Licensing: As a Harvard spinout with proprietary technology based on dynamic stability, Adden Energy may license its technology and patent families to battery manufacturers and automotive companies.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels3 records
Adden Energy product offering
Product offeringCore offering
Adden Energy develops and manufactures dynamically-stable, self-healing solid-state lithium-metal battery cells for electric vehicles and industrial applications. The batteries are designed to charge in approximately three minutes, last a million miles, deliver longer range than gasoline vehicles, and use 100% non-flammable components. The technology is built on the Dynamic Stability phenomenon discovered at Harvard and protected by expansive patent families.
Product overview
Adden Energy offers a single unified core product: its dynamically-stable solid-state lithium-metal battery technology. This battery incorporates self-healing solid-state separators, a porous lithium metal anode, new material innovations, enhanced cathode, AI design interfaces, and advanced cell structure. The technology is designed for automotive applications including EVs, vans, and trucks, with additional applications in drones, data centers, robotics, and other AI-driven mobility.
Differentiator
Problem solved
Functional benefit
Products and services
- Adden Energy Dynamically-Stable Solid-State Lithium-Metal Battery A dynamically-stable, self-healing solid-state lithium-metal battery cell designed for electric vehicles (cars, trucks, vans) and industrial applications such as drones, data centers, robotics, and AI-driven mobility. It features approximately three-minute charging, a million-mile lifetime, longer driving range than gasoline vehicles, and 100% non-flammable components, supported by a porous Li metal anode, enhanced cathode, AI design interfaces, and advanced cell structure.
Quantifiable outcome
- EV batteries capable of charging in approximately 3 minutes, comparable to filling a gas tank
- +2 more outcomes
Companies that use Adden Energy
Customer profileSegments4 records
Ideal customer profiles2 records
Adden Energy technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Adden Energy partnerships and signals
Strategic signalPartnerships
One partnership is on record.
Scale indicators6 records
Recent moves6 records
Expansion highlights4 records
Adden Energy competitors and assessment
Company assessmentDirect peers
- QuantumScape: Public solid-state lithium-metal battery developer pursuing automotive-grade cells. Direct competitor targeting the same OEM customers with similar lithium-metal anode architecture, though QuantumScape is further along in publicly disclosed qualification milestones.
- Solid Power: Public solid-state battery developer (spun out of CU Boulder) producing sulfide-based cells with BMW and SK On as partners. Direct competitor in the same automotive-targeted solid-state battery category.
- SES AI: Public developer of hybrid lithium-metal batteries for EVs, with Honda, GM, and Hyundai as development partners. Competes directly with Adden in lithium-metal anode chemistry aimed at automotive applications.
- Factorial Energy: Solid-state battery developer with investments from Mercedes-Benz, Stellantis, and Hyundai. Competes directly with Adden in next-gen EV batteries targeting automotive OEMs.
- ProLogium Technology: Taiwan-based solid-state battery manufacturer with announced supply agreements with multiple European automakers. A direct competitor in ceramic-based solid-state cells for the automotive market.
Broad incumbents
- Toyota: Largest automaker with a heavily resourced in-house solid-state battery program, having announced commercialization targets for solid-state cells. Represents both a potential customer and the dominant competitive incumbent in the same end-market.
- Samsung SDI: Major battery manufacturer with publicly announced solid-state battery development program and pilot line. Competes broadly in the same end-market with vastly larger scale and automotive customer relationships.
- CATL: World's largest battery manufacturer with a focused solid-state battery roadmap (Qilin, condensed-state variants). Dominant incumbent whose scale and OEM relationships represent the primary competitive threat for any solid-state startup.
Emerging players
- Sakuu Corporation: Solid-state battery developer using 3D-printing manufacturing approach targeting EV and e-mobility markets. Emerging competitor with partial overlap in solid-state chemistry and automotive use cases.
- Ampcera: Solid-state electrolyte and battery materials company developing sulfide-based and oxide-based electrolytes for next-gen batteries. Complementary/adjacent competitor in the solid-state battery supply chain.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat3 records
Key risks7 records
Key highlights6 records
Customer concentration
Adden Energy social profiles
Digital presenceAdden Energy financial estimates
Financial estimateRevenue estimate
Valuation estimate
Adden Energy leadership team
Management profileNumber of profiles
Profiles12 records
Adden Energy funding detail
Funding detailFunding overview
Funding rounds2 records
Investors4 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Adden Energy M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Adden Energy
What does Adden Energy do?
Adden Energy develops and manufactures dynamically-stable, self-healing solid-state lithium-metal battery cells for electric vehicles and industrial applications. The batteries are designed to charge in approximately three minutes, last a million miles, deliver longer range than gasoline vehicles, and use 100% non-flammable components. The technology is built on the Dynamic Stability phenomenon discovered at Harvard and protected by expansive patent families.
Is Adden Energy a public or private company?
Adden Energy is a private company. It is classified as venture growth investor backed and is currently operating.
When was Adden Energy founded?
Adden Energy was founded in 2021. It employs 1 to 10 people.
Where is Adden Energy based?
Adden Energy is headquartered in Waltham, United States, in the North America region.
How does Adden Energy make money?
Two revenue lines are on record. Battery Cell Sales are the primary driver. The others are technology Licensing.
Who are Adden Energy's main competitors?
Direct peers on record are QuantumScape, Solid Power, SES AI, Factorial Energy and ProLogium Technology. Broad incumbents are Toyota, Samsung SDI and CATL. Emerging players are Sakuu Corporation and Ampcera.
Does Adden Energy have an API?
No public API is recorded for Adden Energy.
What industry is Adden Energy in?
Adden Energy's product category is Solid-State Lithium-Metal Batteries. Its primary akta.pro industry code is IMAGAHAA, Battery Cells (Li-ion, LFP, Sodium-ion, Lead-acid, NiMH), with a secondary code of EUAFABAH, Solid-State Battery Materials & Cell Manufacturing. Its NAICS code is 33591 and its SIC code is 3600.