A solution-to-solid conversion chemistry enables ultrafast-charging and long-lived molten salt aluminium batteries.

ABSTRACT: Conventional solid-to-solid conversion-type cathodes in batteries suffer from poor diffusion/reaction kinetics, large volume changes and aggressive structural degradation, particularly for rechargeable aluminium batteries (RABs). Here we report a class of high-capacity redox couples featuring a solution-to-solid conversion chemistry with well-manipulated solubility as cathodes-uniquely allowed by using molten salt electrolytes-that enable fast-charging and long-lived RABs. As a proof-of-concept, we demonstrate a highly reversible redox couple-the highly soluble InCl and the sparingly soluble InCl₃-that exhibits a high capacity of about 327 mAh g^-1 with negligible cell overpotential of only 35 mV at 1 C rate and 150 °C. The cells show almost no capacity fade over 500 c

SUBMITTER: Meng J 

PROVIDER: S-EPMC10318033 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature