SES

SolidEnergy Systems (SES) is a lithium-metal battery developer and manufacturer of battery cells for EVs. SES hybrid Li-metal batteries replace the graphite anode with lithium-metal to improve energy density (to around 400 Wh/kg). SES also uses a hybrid electrolyte—the battery has a solid protective coating on the lithium-metal anode and a liquid in the cathode, unlike some solid-state batteries (Solid Power and QuantumScape) that are all-solid and free of any liquid. The company’s battery is expected to enable a longer driving range (around 500–600 miles) and is also capable of reaching an 80% charge in under 15 minutes. In 2021, SES was the first company to introduce 100Ah Li-metal cells, globally.

SES’ large format Li-metal EV and eVTOL cells known as “Apollo” can be customized for different OEM requests. As such, the company has begun pilot-scale manufacturing of 50Ah to 100Ah Li-Metal cells with GM, Hyundai, and Honda at their Shanghai (China) and Chungju (Korea) battery manufacturing facilities. The company aims to commercialize its batteries by 2025. SES expects to establish the world’s first B-sample Joint Development Agreement (JDA) with an automotive OEM in December 2023.

  Funding and financials

In February 2023, SES received an undisclosed amount of cash grants from the South Korean Central Government. Prior to this in April 2021, the company raised USD 139 million in a Series D funding round led by General Motors, while in July 2021, it raised USD 100 million from Hyundai. 

SES was listed on NYSE through a SPAC merger in February 2022. The deal raised USD 275 million at a valuation of USD 3.6 billion. The proceeds were to be used to accelerate growth and fund key development initiatives.