
Solid-state batteries are thought to offer significantly higher energy density than conventional lithium-ion batteries, fueling expectations that they could enable the next-generation of EVs. U.K. research firm Rho Motion has flagged one catalyst for the industry's rejuvenated momentum: the launch of the first oxide-based semi-solid-state EVs by China's Nio and IM Motors in the second half of last year. [pdf]

A solid-state battery (SSB) is an that uses a (solectro) to between the , instead of the liquid or found in conventional batteries. Solid-state batteries theoretically offer much higher than the typical or batteries. Mercedes-Benz is testing the world’s first production EV with a solid-state battery, promising to deliver over 621 miles of driving range. Mercedes hit a big milestone, taking its solid-state EV battery tech from the lab to the real world. [pdf]

The battery, as reported in the original publication, is constructed using an alkali metal (lithium or sodium foil) as the negative electrode (anode), and a mixture of carbon and a redox active component, as the positive electrode (cathode). The cathode mixture is coated onto copper foil. The redox active component is either sulfur, ferrocene, or manganese dioxide. The electrolyte is a highly conductive. Development historyIn 2009, and developed the first on ultra‑thin glass substrate. . Braga and Goodenough stated they expect the battery to have an energy density many times higher than current lithium-ion batteries, as well as an operating temperature range down to −20 °C (−4 °F); much lower than. [pdf]
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