According to an official announcement from the Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences (CAS), the institute has successfully overcome the final hurdle in the production process of sulfide all-solid-state batteries for large-scale vehicle batteries. They have also achieved a critical breakthrough in the technology of sulfide pouch cell stacking.
As the core technology of the next-generation power battery, solid-state batteries have been highly anticipated. Solid-state batteries offer advantages such as high safety, good stability, and high energy density, addressing issues like short lifespan, flammability, and explosiveness associated with traditional organic electrolyte batteries.
Among them, sulfide all-solid-state lithium batteries possess high energy density and high rate performance, making them the optimal choice for electric vehicle power sources. This has attracted attention and investment from major global automotive companies, who have announced related mass production plans.
It is reported that the institute’s Advanced Energy Storage Materials and Technology Research Group has successfully developed multi-layer pouch cell batteries. After 300 cycles of testing, their capacity has almost no degradation.
Simultaneously, the institute is accelerating the research and verification process and plans to achieve mass production of sulfide all-solid-state batteries by 2026.
Currently, the Qingdao Institute of Energy Research, CAS, has established a small-scale production line for solid-state batteries and successfully developed high-voltage, long-life pouch all-solid-state lithium-ion batteries.
After 1000 cycles of testing, their capacity remains at 92%. The batteries are currently undergoing further testing to meet discharge capacity requirements at a 4C rate (according to Toyota’s standards, which require 1500 cycles with capacity retention of 80%).