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Creators/Authors contains: "Fu, Yuqing"

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  1. ; ; ; ; ; ; ; (, Advanced Functional Materials)
    Abstract Herein, a self‐charging mechanism of rechargeable aluminum (Al) batteries with Chevrel phase molybdenum sulfide (Mo6S8) cathode is reported. The results unambiguously reveal that the self‐charging is a spontaneous disproportionation of Al intercalated Mo6S8originated from the dynamic shift of Al between occupied sites during Al intercalating and resting. The theoretical study indicates that the fully Al intercalated Mo6S8in the format of Al4/3Mo6S8is kinetically accessible driven by electrochemical overpotential but thermodynamically unstable due to the repulsion between Al3+cations. This mechanism is a true self‐charging with no input of any form of energy, thus distinctly superior to the previously reported self‐charging mechanisms. Based on this discovery, a semi‐flow AlMo6S8battery is designed and demonstrated with long‐lasting discharge capability and high capacity. 
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