German chemical company BASF has delivered its first batch of mass-produced cathode materials for semi-solid-state batteries to Chinese battery developer Beijing Welion New Energy Technology. The materials were produced through the BASF Shanshan Battery Materials joint venture. This step is part of the plan to bring solid-state batteries into wider use.
Higher energy density, cycle stability, service life
The project between the two companies was launched in August 2024 and transitioned from the concept phase to series production within a year. The supplied materials are based on a high-nickel NCM cathode material with a special composite coating. According to BASF, this development aims to mitigate interface issues between the cathode material and the solid electrolyte. These improvements are said to promise to enhance energy density, cycle stability, and service life. The collaboration is geared toward the materialsʼ future commercial use. WELION plans to use the supplied cathode materials in the next generation of semi-solid solid-state batteries.
Continuation of joint projects
Meanwhile, both companies have announced to continue their joint projects. Founded in 2016, WELION New Energy has close ties to the Institute of Physics at the Chinese Academy of Sciences. The company focuses on researching, developing, and producing solid-state lithium-ion batteries. WELION describes itself as a pioneer in this field and points to several technological firsts.
Source:
https://www.basf.com/global/en/media/news-releases/2025/08/p-25-168
