SOLIDBAT Partner Insights - Fraunhofer ISC

As a key materials innovation partner in the SOLIDBAT project, Fraunhofer ISC contributes its expertise in particle engineering, interface design, and recycling technologies to advance next-generation solid-state batteries. In this interview, Fraunhofer explains how scalable coating processes and direct recycling approaches are supporting more sustainable, cost-effective, and high-performance battery solutions across the European value chain.

• Why did you join the SOLIDBAT project?

Fraunhofer ISC joined the SOLIDBAT project to advance the development of next-generation solid-state batteries by contributing its expertise in particle engineering, interface design, design-for-recycling, and direct recycling processes. As a materials-focused institute, we see SOLIDBAT as a unique platform to collaborate with leading European partners across the entire battery value chain. The project allows us to transfer our know-how in scalable coating technologies and direct recycling processes to the field of solid-state batteries.

• Which innovative concept will be developed by Fraunhofer within SOLIDBAT?

Fraunhofer ISC develops innovative protective coatings for Ni-rich NMC cathode materials using a scalable spray-drying process. The coating serves two key functions: it prevents contact between the active material and water, thereby enabling aqueous electrode fabrication, and it enhances electrochemical performance by suppressing side reactions at the cathode–electrolyte interface. In parallel, Fraunhofer ISC is advancing processes for the direct recycling of solid-state battery components, contributing to a more sustainable and circular battery value chain.

• Which is your main exploitable result?

The main exploitable result from Fraunhofer ISC will be the development of novel coated cathode active materials (CAMs) using scalable processes. In addition, Fraunhofer ISC will offer processes for the direct recycling of solid-state battery components, providing industrial partners with sustainable and circular solutions for next-generation battery production.

• How will your development contribute to cost and sustainability KPIs of SOLIDBAT battery?

Fraunhofer ISC contributes to SOLIDBAT’s cost and sustainability KPI’s by developing protective coatings for Ni-rich NMC cathode materials, enabling water-based electrode fabrication and improving cycle life, while also advancing direct recycling processes for solid-state battery components. These innovations reduce manufacturing costs, extend battery lifetime, and support a circular, resource-efficient value chain.

• What would you say is a realistic timeframe to see SOLIDBAT batteries on the market?

SOLIDBAT is expected to deliver 5 Ah demonstrators by the end of the project in 2028. Following further optimization and scale-up of manufacturing, commercial solid-state batteries using SOLIDBAT technology could realistically reach the market in the early 2030s.