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Electrochemically reversible conversion of I2/I− redox couple in a controllable iodine speciation manner is the eternal target for practical metal‐iodine batteries. This contribution demonstrates an advanced polyiodide‐free Zn‐I2 battery achieved by the bidirectional confined redox catalysis‐directed quasi‐solid iodine conversion. A core‐shell structured iodine cathode is fabricated by integrating...
Although batteries fitted with sodium metal anodes and sulfur cathodes are attractive for their higher energy density and lower cost, the threat of polysulfide migration in organic liquid electrolytes, uncontrollable dendrites, and corresponding safety issues has locked the deployment of the battery system. Introduction of solid‐state electrolytes to replace conventional liquid‐based electrolytes...
To achieve the full theoretical potential of high energy ZnS electrochemistry, the incomplete and sluggish conversion during battery discharging and high reactivation energy barrier during battery recharging associated with the sulfur cathodes must be overcome. Herein, the atomically dispersed Fe sites with FeN4 coordination are experimentally and theoretically predicted as bidirectional electrocatalytic...
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