首页|A Room-Temperature Chloride-Conducting Metal-Organic Crystal[Al(DMSO)6]Cl3 for Potential Solid-State Chloride-Shuttle Batteries
A Room-Temperature Chloride-Conducting Metal-Organic Crystal[Al(DMSO)6]Cl3 for Potential Solid-State Chloride-Shuttle Batteries
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The growing demand for substitutes of lithium chemistries in battery leads to a surge in budding novel anion-based electrochemical energy storage,where the chloride ion batteries(CIBs)take over the role.The application of CIBs is limited by the dissolution and side reaction of chloride-based electrode materials in a liquid electrolyte.On the flipside,its solid-state electrolytes are scarcely reported due to the challenge in realizing fast Cl-conductivity.The present study reports[Al(DMSO)6]Cl3,a solid-state metal-organic material,allows chloride ion transfer.The strong Al-Cl bonds in AlCl3 are broken down after coordinating of Al3+by ligand DMSO,and Cl-in the resulting compound is weakly bound to complexions[Al(DMSO)6]3+,which may facilitate Cl-migration.By partial replacement of Cl-with PF6-,the room-temperature ionic conductivity of as-prepared electrolyte is increased by one order of magnitude from 2.172 × 10-5 S cm-1 to 2.012 × 10-4 S cm-1.When they are assembled with Ag(anode)/Ag-AgCl(cathode)electrode system,reversible electrochemical redox reactions occur on both sides,demonstrating its potential for solid-state chloride ion batteries.The strategy by weakening the bonding interaction using organic ligands between Cl-and central metallic ions may provide new ideas for developing solid chloride-ion conductors.
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