Affiliation:
1. State Key Laboratory of Materials‐Oriented Chemical Engineering Jiangsu Collaborative Innovation Center for Advanced Inorganic Functional Composites College of Materials Science and Engineering Nanjing Tech University Nanjing 211816 China
2. School of Physics Southeast University Nanjing 211189 China
Abstract
AbstractPerovskite chloride, an anion conductor, is a promising candidate to be a solid electrolyte for high‐energy and sustainable chloride ion batteries (CIB). However, it suffers from poor structural stability at low temperature and in ambient conditions, which leads to its transformation from an ionic conductor to an insulator. Herein, a bismuth and chlorine dual doping strategy is developed to stabilize the cubic structure of CsSnCl3 in harsh environments. The as‐prepared dual‐doped CsSn0.9Bi0.1Cl3.1 material with an optimized composition maintains its cubic structure at the extremely low temperature of 213 K for 10 days and at 40% relative humidity for 50 days, while the undoped cubic material deteriorates and transforms to a monoclinic phase under these conditions in less than 1 day. Consequently, the dual doping achieves efficient chloride ion conduction that is superior to single bismuth doping due to the introduction of interstitial chlorine facilitating chloride ion transport. Importantly, the practicality of the as‐prepared solid electrolyte is demonstrated in different symmetric solid cells and by various CIBs using the organic electrode couple, a multivalent metal chloride cathode, or a new high‐voltage metal oxychloride cathode.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Priority Academic Program Development of Jiangsu Higher Education Institutions
“333 Project” of Jiangsu Province
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science