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From Prelithiation to Presodiation: A Materials Approach Redefining the Lifespan Limits of Batterie (Video)

Lithium squarate (Li₂C₄O₄) is a new cathode prelithiation additive that releases active lithium during the first charge to offset losses. It leaves only about 19% residue by weight, is a neutral salt that does not react with water or air, and can be added directly during cathode slurry mixing with no changes to the production line. Under ChemWhat brand authorization, Watson is producing high-purity lithium squarate (Li₂C₄O₄) raw material in volume for partners worldwide, and is extending the same approach to develop sodium squarate (Na₂C₄O₄) for sodium batteries.

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