SES AI Corp (SES)

SES AI Corp (ticker SES, trading on the NASDAQ) is a battery manufacturer founded to commercialize an advanced lithium-metal chemistry developed at research institutions. The company represents a particular kind of startup path: not a new application of existing technology, but an attempt to bring a different fundamental approach to an established category — in this case, to replace the lithium-ion batteries that power everything from phones to electric vehicles with a design that squeezes more energy into the same space.

The founding and academic roots

SES traces its technology to research at MIT’s laboratory for electrochemistry, where the company’s founders — Qichao Hu, Yet-Ming Chiang, and others — focused on reimagining the fundamental design of battery cells. Traditional lithium-ion batteries pair a graphite anode with a lithium-oxide cathode, separated by an electrolyte that shuttles lithium ions back and forth. The question that drove SES’s founding in 2012 was whether a lithium-metal anode — a layer of pure lithium — could replace graphite and unlock significantly higher energy density, meaning more power per unit of weight or volume. That structural difference, if it could be made manufacturable and durable, would offer a real competitive advantage in applications where weight and space matter most: electric vehicles and aerospace.

The journey from laboratory concept to commercial product is lengthy and expensive. Through the early 2010s, SES published research, raised venture capital, and built small pilot production lines to prove the concept could work in reality. In 2020, the company announced a partnership with one of China’s largest automakers, BYD, signalling confidence that the technology was approaching maturity. The company then pursued a public listing, initially attempting a traditional initial public offering before pivoting to a combination with a special-purpose acquisition company (SPAC) in 2021, which brought SES to public markets.

The technology and its promise

Lithium-metal batteries promise a meaningful leap in energy density — potentially 40% more energy stored in the same package compared to conventional lithium-ion cells. For an electric vehicle, that translates to either longer range on the same battery size or the same range with a much lighter, smaller, and cheaper battery. For aerospace applications, where every kilogram of weight costs fuel and range, the advantage is profound. The chemical foundation is sound: lithium metal is the lightest metal and has the highest electrochemical potential, so in principle it should outperform carbon-based anodes.

The catch is manufacturing durability. Lithium metal is highly reactive and prone to forming unwanted crystalline structures (dendrites) that can short-circuit the cell and cause dangerous failures. SES addresses this through proprietary electrolyte formulations and cell architecture designed to prevent degradation during repeated charging cycles. The company has demonstrated cells in prototypes and pilot batches, but commercial-scale production at the volumes required by major vehicle manufacturers remains the challenge — a multi-billion-dollar investment in new plants and processes.

The manufacturing gauntlet

Scaling a new battery chemistry requires capital that few companies can raise without backing from established partners or deep pools of venture money. SES has access to both: it holds partnerships with BYD and has received investment from industrial partners including Samsung and Daimler. Yet producing cells at automotive scale — tens of gigawatt-hours per year — means building factories, sourcing raw materials at scale, training workers, and validating every step of the process to meet strict safety and performance standards. The automakers that would use these batteries cannot risk cells that degrade too quickly or carry safety risks, so qualification and testing can take years.

The company also faces the reality that lithium-ion chemistry itself is improving. Competitors and incumbents continue to refinement conventional designs, and new approaches like sodium-ion batteries and solid-state (another lithium-metal variant) are being pursued by companies with deeper resources. SES’s advantage is real only if it reaches volume production before the window of opportunity closes.

The path from now

As a pre-commercial manufacturer, SES faces two principal financial pressures. First, it continues to burn cash on research and development and production scaling, requiring sustained funding. Second, it has little to no revenue — the value of the company rests entirely on whether its partners will eventually place large orders and whether the technology performs as promised in real vehicles. That asymmetry means the company is thinly capitalized relative to the scale of investment needed, and shareholder returns depend entirely on being right about both the technology and the market’s willingness to pay for it.

Anyone considering SES as an investment should understand that this is fundamentally a bet on the company’s ability to deliver a working product at scale and convince automakers to adopt it as a main supply source. The SEC filings (CIK 0001819142) lay out the risks: customer concentration (BYD is enormous), the capital required to build plants, competition from established battery makers and other advanced chemistries, and the possibility that improvements in lithium-ion design make the superior energy density less strategically important. Watch announcements of production milestones, partnerships with major vehicle makers, and the company’s cash burn rate.