EVE Energy Rolls Out 1,045 Wh/L Solid-State Cell and Sodium-Ion Pack

EVE Energy rolled a new all-solid-state cell, the Longquan No. 3 2.0, off its line at the Chengdu base on Oct. 20, 2026, with a stated volumetric energy density of 1,045 Wh/L, according to Gasgoo and EnergyTrend.

The anode-free cell is a titanium-cased button, 23 mm across and 4 mm thick, built for implantable brain-computer interfaces. EVE says that density is about 40% above conventional liquid-electrolyte cells, and that the solid electrolyte removes the leakage and thermal-runaway risks of a liquid one. The company also signed cooperation agreements with Sichuan Provincial People's Hospital and a second partner to cover research, industrialization and clinical use; the two outlets name that partner differently (SceneRay and Jingyu Medical).

The ceremony also covered two other cells: a polymer-oxide all-solid-state battery and a solid-liquid hybrid battery. Gasgoo calls the first a "polyoxygen" battery, so the exact chemistry name is not settled. Neither report gives capacity or energy-density figures for those two cells.