Defence Finance Monitor

Defence Finance Monitor

SOLiTHOR: Solid-State Lithium Batteries for Europe’s Strategic Autono

Aug 20, 2025
∙ Paid
Imec spin-off SOLiTHOR closes a €10M seed investment round to develop a new  disruptive solid-state battery cell technology

SOLiTHOR is an emerging European battery innovator developing next-generation solid-state lithium cells – technology poised to redefine how Europe powers vehicles and defense systems. This deep-tech spin-off from Belgium’s renowned imec research center has set out to solve the biggest limitations of today’s batteries: energy capacity, safety, and supply security[1][2]. Founded in 2021, the company has quickly gained attention for its novel nano-composite electrolyte and lithium-metal anode design, which promise ultra-high energy density and non-flammable reliability. But SOLiTHOR’s story is about more than scientific breakthroughs. It embodies Europe’s strategic drive to achieve technological sovereignty in critical energy storage – a mission as relevant to electric cars and aircraft as it is to the future of defense autonomy. The company’s quiet rise from an EU lab project to a contender in the global battery race offers a compelling glimpse into how Europe plans to lessen its dependence on foreign suppliers. With major milestones already reached in performance and strong ties to European industry and R&D, SOLiTHOR is positioning itself at the nexus of green innovation and strategic resilience. It’s a journey that could illuminate Europe’s broader quest for energy independence and multi-domain operational readiness.


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