A

Adden Energy

Develops solid-state lithium-metal EV batteries

Research Technician - Off-Hours Shift

Full-TimeUpdated on 10/22/2026
No salary listed
Mid
Bachelor's
Waltham, MA, USA
In Person
Manufacturing & Production OperationsMachine & Process Operation
H1B Sponsorship Available

About the job

Requirements
  • A Bachelor of Science degree in chemical engineering, chemistry, materials science, engineering, or a related field, or equivalent experience.
  • Experience mixing and coating battery materials to fabricate cathode, anode, and/or solid electrolyte components.
  • Ability to work safely and comply with all regulations and quality systems.
  • Experience working in a chemical laboratory.
Responsibilities
  • Develop battery material mixing and coating processes, including tooling, equipment, and inspection methods for solid-state battery components.
  • Perform mixing and coating of solid-state battery components according to standard operating procedures.
  • Operate mass balances, mixers, coaters, and gloveboxes, and handle chemicals and other laboratory equipment to produce solid-state battery components.
  • Maintain laboratory environmental standards and essential laboratory equipment.
  • Coordinate and execute equipment maintenance according to manufacturer guidelines.
  • Manage outside vendors.
Desired Qualifications
  • Experience with ceramic solid electrolytes.
  • Experience working with a glovebox.

About the company

Adden Energy develops advanced solid-state batteries for electric vehicles. Its core product is a dynamically-stable lithium-metal battery designed to replace traditional lithium-ion cells. The battery can potentially charge in as little as three minutes and endure over 10,000 cycles in laboratory tests, with ongoing efforts to improve low-temperature performance. The company operates with a business-to-business model, targeting automotive OEMs and running a pilot production line to manufacture sample cells for potential customers. Backed by substantial funding and rooted in Harvard University, Adden Energy aims to bring a commercially viable solid-state battery to market that enables faster charging, longer life, and easier adoption of EVs by a wider range of consumers.

Company Size

11-50

Company Stage

Series B

Total Funding

$42.3M

Headquarters

Waltham, Massachusetts

Founded

2021

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Simplify's Take

What believers are saying

  • February 2025 pilot line reached full production rate by summer, signaling execution momentum.
  • Adden says automaker customers already ordered sample cells for validation in Waltham.
  • July 2026 hiring for battery and mechanical engineers shows active scaling, not retrenchment.

What critics are saying

  • Commercialization depends on OEM validation; without design wins, pilot-line economics collapse in 2026.
  • Solid-state battery timelines routinely slip; Adden must prove yield, safety, and cost before 2027.
  • If automaker demand stalls, Adden Energy becomes a science project, not a standalone company.

What makes Adden Energy unique

  • Harvard-exclusive license and Waltham pilot line keep process ownership close to R&D.
  • Adden Energy makes lithium-metal pouch cells on lithium-ion standard equipment.
  • 2024 fast-charging and 2025 low-temperature claims position it ahead of many solid-state peers.

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Benefits

  • Health Insurance
  • Dental Insurance
  • Vision Insurance
  • Paid Vacation
  • Stock Options

Growth & Insights and Company News

Headcount

6 month growth

-4%

1 year growth

4%

2 year growth

4%
Intelligence360
Oct 19th, 2026
Adden Energy has filed a notice of an exempt offering of securities to raise $26,641,463.00 in New Funding. - intelligence360

According to filings with the U.S. Securities and Exchange Commission, Adden Energy is raising up to $26,641,463.00 in new funding. The federal securities law requires the notice to be filed by companies that have sold securities without registration under the Securities Act of 1933 in an offering made under Rule 504 or 506 of Regulation

EVMagz
Feb 25th, 2025
Adden Energy Commissions Pilot Production Line for Solid-State Lithium Metal Batteries

Adden Energy has officially launched a pilot production line to manufacture its dynamic-stability lithium metal solid-state batteries, aiming to advance battery technology with improved energy density, faster charging, and enhanced safety.

TechCrunch
Oct 24th, 2024
Wayve takes to the streets of San Francisco, Elon Musk makes another robotaxi promise, and inside Pony.AI's IPO

Adden Energy, a solid-state battery startup that spun out of Harvard, raised $15 million in Series A funding led by At One Ventures.

Business Wire
Oct 24th, 2024
Adden Energy Raises $15M to Expand Accessibility of Electric Vehicles

Electric Vehicle (EV) adoption is one of the most meaningful steps an individual can take to combat climate change. Yet, current battery performance i

U.S. Securities and Exchange Commission
Oct 4th, 2024
SEC FORM D

The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.The reader should not assume that the information is accurate and complete.