All-solid-state batteries are widely recognized as the optimal choice for next-generation electric vehicles, prompting numerous companies to invest heavily in their research and development. Japanese media recently reported that Nissan’s prototype all-solid-state battery cells have achieved an energy density of 400–500Wh/kg—double that of conventional lithium-ion batteries, which typically hover around 250Wh/kg. Meanwhile, on October 23, 2025, China’s Sunwoda introduced its new-generation polymer all-solid-state battery, dubbed "Xin·Bixiao." This innovation offers an energy density of 400Wh/kg and a cycle life of 1,200 charges, with plans to establish a 0.2GWh pilot production line by year’s end. Domestically, solid-state battery technology is advancing swiftly: Farasis Energy has successfully scaled up production and integrated semi-solid-state batteries into vehicles, while the Qingdao Institute of Bioenergy and Bioprocess Technology at the Chinese Academy of Sciences has achieved breakthroughs in sulfide-based all-solid-state batteries.