Mitsui Kinzoku, Factorial to scale all-solid-state battery manufacturing

What happened

According to a press release, US firm Factorial Energy announced on October 22, 2026 a strategic partnership with Japan-based Mitsui Kinzoku, a producer of sulfide-based solid electrolytes for all-solid-state batteries, to support the industrialization of its Solstice all-solid-state battery platform. The companies aim to accelerate the realization of next-generation batteries by leveraging Mitsui Kinzoku's long-established expertise in materials and manufacturing technologies combined with Factorial's advanced technological capabilities. Dr. Kiyotaka Yasuda, Senior Executive Officer and General Manager of the Business Creation Division of Mitsui Kinzoku Company, Limited, said he was very pleased to enter into this joint development agreement with Factorial. Factorial CEO Siyu Huang said Mitsui Kinzoku's foundational electrolyte technology brings critical materials expertise to moving Solstice toward commercial deployment. The partnership is at the announcement/planned stage; implementation of industrialization is not confirmed as complete. The article also notes background: Factorial's prior strategic investments from IQT and POSCO Future M, its first commercial orders for passenger vehicles and aerospace, expanded automotive and industrialization partnership programs, and its June 2026 Nasdaq listing under the ticker symbol FAC.

Impact and signal

Affected components and suppliers

Source and time

Source: Evertiq · 10/21/2026 · View original source