SOLiTHOR targets 850Wh/l for solid state lithium metal battery

SOLiTHOR targets 850Wh/l for solid state lithium metal battery

Technology News |
By Nick Flaherty

SOLiTHOR in Belgium has reached a milestone of 500 cycles for its first generation solid-state lithium metal prototype pouch cell.

The 500 cycles at full charge-discharge show less than 7% of capacity loss and continues to cycle further for the solid state battery cell.  The pouch cells that continue to cycle have been going through ongoing tests in SOLiTHOR’s laboratories for several months now at ambient temperature conditions of 25ᵒC with 72 psi applied external pressure.

The industry standard targets for this development phase are 700 charging cycles with a maximum capacity loss of 20%. The company, a spin out of imec, expects to reach this target shortly.

In addition to cyclability performances, the solid state battery cells have and energy density of 785Wh/L and 318Wh/kg at stack level. The next medium-term target is achieving between 850Wh/l and 900Wh/l for automotive and aerospace battery packs.

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“This endurance test is a crucial stepping stone as it proves the durability of our product and the stability of our chemistry at ambient temperature, bringing long-range electric vehicles closer to consumer requirements. The final result of this development could be a battery cell that enables long ranges,” said Dr Fanny Bardé, CTO of SOLiTHOR.

“These technical developments underpin the strategic thrust of the all-solid-state lithium metal cell technology for use by the aviation and maritime sectors. The collaboration with aircraft manufacturers and naval architects is providing the impetus behind these results, and provides the confidence to our clients for key performance targets in the coming two years.  It also means that SOLiTHOR is getting closer and closer to developing all-solid-state technology for the entire electromobility sector,” said Huw Hampson-Jones, CEO of SOLiTHOR.

The company was formed in 2022 to commercialise research into solid state composite electrolytes from imec and will have over 40 employees by the end of 2024.

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