biostudies-literatureJin YNational Natural Science Foundation of Chinae2205888https://www.ebi.ac.uk/biostudies/studies/S-EPMC9951353biostudies-literatureUnknown10(6)The FeS₂ has abundant reserves and a high specific capacity (894 mAh g^-1 ), commonly used to fabricate Li-FeS₂ primary batteries, like LiM_x -FeS₂ thermal batteries (working at ≈500 °C). However, Li-FeS₂ batteries struggle to function as rechargeable batteries due to serious issues such as pulverization and polysulfide shuttling. Herein, highly reversible solid-state Li-FeS₂ batteries operating at 300 °C are designed. Molten salt-based FeS₂ slurry cathodes address the notorious electrode pulverization problem by encapsulating pulverized particles in time with e^- and Li⁺ flow conductors. In addition, the solid electrolyte LLZTO tube serves as a hard separator and fast Li⁺ channel, efAdvanced science (Weinheim, Baden-Wurttemberg, Germany)Modulation of the Oxidation End-Product Toward Polysulfides-Free and Sustainable Lithium-Pyrite Thermal Batteries.PMC995135352177223Lyu NZhang DLiu KLu HSun BJiang XJin YWu HfalseModulation of the Oxidation End-Product Toward Polysulfides-Free and Sustainable Lithium-Pyrite Thermal Batteries.The FeS₂ has abundant reserves and a high specific capacity (894 mAh g^-1 ), commonly used to fabricate Li-FeS₂ primary batteries, like LiM_x -FeS₂ thermal batteries (working at ≈500 °C). However, Li-FeS₂ batteries struggle to function as rechargeable batteries due to serious issues such as pulverization and polysulfide shuttling. Herein, highly reversible solid-state Li-FeS₂ batteries operating at 300 °C are designed. Molten salt-based FeS₂ slurry cathodes address the notorious electrode pulverization problem by encapsulating pulverized particles in time with e^- and Li⁺ flow conductors. In addition, the solid electrolyte LLZTO tube serves as a hard separator and fast Li⁺ channel, ef2023-01-01T00:00:00Z2023 Feb2025-05-29T19:43:09.323Z2025-05-29T19:43:09.323ZS-EPMC99513533660316410.1002/advs.202205888