Li-Metal

SES AI’s approach versus other approaches

Conventional Li-ion

Energy density

Manufacturability

Solid-state Li-Metal

Energy density

Manufacturability

SES AI Li-Metal

Energy density

Manufacturability

Key breakthrough: our proprietary and patented liquid electrolyte

SES Al's innovative and proprietary high concentration solvent-in-salt electrolyte composition

Low concentration

Most solvent molecules are uncoordinated

High concentration

Solvent almost fully coordinated; no free solvent

SES AI electrolyte uses a high concentration solvent-in-salt approach. A conventional liquid electrolyte is low concentration, where the salt is coordinated by solvent and there are free solvent molecules, rendering the overall electrolyte stability of Li-Metal poor.

In SES AI's high concentration electrolyte, the solvent is coordinated by the salt, and there are no free solvent molecules. This allows the electrolyte to achieve unprecedented Coulombic efficiency of>99.6% on Li-Metal. Without this high concentration approach, it was thought liquid electrolyte could never achieve such high stability on Li-Metal and high voltage cathode at the same time.

Electrolyte composition

Salt

A single or multiple salt(s) with purity profile and trade secret purification process

Solvent

Proprietary and patented solvent that SES designed and synthesized; not commercially available

Additives

Proprietary/trade secret

A safe place to innovate and test

SES AI’s test bunkers where it safely tests thousands of 100 Ah Li-Metal cells

Pioneering a first-of-its-kind Li-Metal battery requires the ability to safely try new things. SES AI’s state-of-the-art facilities are equipped with several bunkers, a place where we can safely innovate, test, fail, learn, and repeat. Here we test hundreds and thousands of 100Ah Li-Metal cells.

SES AI believes in full transparency and regularly publishes our cell test data and results on our website. We will continue to publish data reports regularly to keep the industry updated as we improve everything from materials to engineering to manufacturing quality.

Most recent cell data report

We’re committed to transparency

We try new things, test, fail, learn, and repeat.

SES AI believes in full transparency on this journey to a Li-Metal EV battery that will power a new era of electric transportation.

We regularly publish our own cell test data and results as well as cell data testing reports conducted independently by third-parties.

We will continue to publish data reports regularly to keep the industry updated as we improve everything from materials to engineering to manufacturing quality.

Li-Metal

SES AI’s approach versus other approaches

Key breakthrough: our proprietary and patented liquid electrolyte

Electrolyte composition

A safe place to innovate and test

Most recent cell data report

We try new things, test, fail, learn, and repeat.

Stay in the know