Solid-state batteries are among the most active research directions in the secondary battery field at present. Theoretically, the energy density of all-solid-state lithium-ion batteries can reach 900 Wh/kg. By adopting solid electrolytes and high specific energy anodes, and potentially preventing internal short circuits caused by lithium dendrites, solid-state batteries are expected to achieve substantial improvements in energy density and cycle life compared with traditional lithium batteries. Meanwhile, solid-state batteries also feature long storage life, high power density and simple preparation processes; in particular, they exhibit better thermal management and safety performance than conventional lithium-ion batteries with high energy density. As the core technology of solid-state batteries, three major types of composite materials—polymer solid electrolytes, oxide solid electrolytes and sulfide solid electrolytes—have become the focus of technological research and development. However, solid electrolytes require compatible cathode and anode systems. Therefore, the process of advancing the industrialization of all-solid-state batteries will also drive a comprehensive transformation of the cathode and anode material systems for lithium batteries.

As a viable supplement to lithium-ion batteries, sodium-ion batteries have attracted extensive research attention worldwide and achieved rapid development in recent years. Given the current constraints of high costs and lithium resource shortages faced by lithium-ion batteries, sodium-ion batteries are expected to gain widespread applications in low-speed electric vehicles, distributed energy storage and large-scale energy storage sectors, thanks to their abundant raw material resources, low cost and high cost-effectiveness. Sodium-ion batteries share the same working principle as lithium-ion batteries, and their production processes and equipment are similar. Hundreds of enterprises at home and abroad have already engaged in the research, development and manufacturing of new-type sodium-ion batteries.

In view of the above, to further promote the research innovation and technological advancement of solid-state batteries and sodium-ion batteries in China, keep abreast of the latest research achievements and development trends of solid-state batteries, accelerate the large-scale downstream application, clarify the main market demands, strengthen industry exchanges, and promote industry-university-research collaborative innovation, we specially organize this thematic seminar on solid-state batteries.