Tiamat Energy

Tiamat Energy was founded in 2017 in Amiens, France as a spin-off from the French National Centre for Scientific Research (CNRS) and the RS2E battery research network. Its founding scientific team built on decades of work by Jean-Marie Tarascon, one of the world's foremost battery chemists, whose research at the Collège de France provided the intellectual foundation for Tiamat's polyanion sodium-ion technology. Tiamat's product architecture is unusual in the sodium-ion space: its first-generation cells use a NASICON-type cathode (sodium superionic conductor) that sacrifices energy density — 90 to 110 Wh/kg for Gen1 — for extraordinary power performance. Gen1 cells support 30C continuous and 100C pulse discharge, enabling complete charge-discharge cycles at rates exceeding 60 times per hour. This positions Tiamat's technology not in the energy-dense EV or grid storage markets but in high-power industrial applications: power tools, data center UPS systems, and fast-charge stations. Gen2 cells target 140 to 160 Wh/kg with continued high-power performance, bridging toward the mainstream storage market. Funding momentum has accelerated: Tiamat secured a $30 million round in January 2024 toward a planned 5 GWh gigafactory near Amiens in the Jules-Verne industrial zone. Investors include Stellantis Ventures, Arkema, MBDA (European defense contractor), and Bpifrance. In 2025, Endeavour Inspired Infrastructure joined as a shareholder in partnership targeting AI data center and power grid high-speed storage. Cycle life on Gen1 exceeds 5,000 cycles in high-power applications. The first production phase — originally 700 MWh/year targeted for late 2025 — has been pushed to 2026, with full 5 GWh capacity expected by 2029 and 500,000 cells per day at peak output. An initial capacity of 1.5 GW power output is targeted for mid-2027.