Open AccessA Room‐Temperature Chloride‐Conducting Metal–Organic Crystal [Al( DMSO ) 6 ]Cl 3 for Potential Solid‐State Chloride‐Shuttle Batteries
Author(s) -
Wu Bing,
Luxa Jan,
Šturala Jiří,
Wei Shuangying,
Děkanovský Lukáš,
Parameswaran Abhilash Karuthedath,
Li Min,
Sofer Zdenek
Publication year - 2024
Publication title -
energy and environmental materials
Language(s) - Uncategorized
Resource type - Journals
ISSN - 2575-0356
DOI - 10.1002/eem2.12530
Subject(s) - chloride , electrolyte , electrochemistry , chemistry , dissolution , inorganic chemistry , anode , lithium (medication) , metal , redox , electrode , organic chemistry , medicine , endocrinology
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 ]Cl 3 , a solid‐state metal–organic material, allows chloride ion transfer. The strong Al‐Cl bonds in AlCl 3 are broken down after coordinating of Al 3+ 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 − withPF 6 − , 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.