Designing inorganic solid electrolytes (ISEs) with both excellent electrochemical stability and high ionic conductivity is an important research direction for all-solid-state batteries. However, due to the electronic conduction of hierarchical decomposition products, there is an imbalance between the ionic transport and electrochemical stability window of the ISEs. Here, we propose a computational approach that incorporates bond valence-Ewald energy analysis and dynamically determined decomposition pathway to portray the competing relationship between ionic transport and stable electrochemical window in solid electrolytes. Following this, we explain the high ionic conductivity and wide electrochemical stability window of Li–Si–B–S solid electrolytes, which features shared corner and edge from tetrahedral SiS4/BS4. Our approach is not only applicable to efficiently characterize the previously reported inorganic solid electrolytes but also expected to accelerate the discovery of more systems.
Portraying the ionic transport and stability window of solid electrolytes by incorporating bond valence-Ewald with dynamically determined decomposition methods
Note: This paper is part of the APL Special Collection on New Technologies and New Applications of Advanced Batteries.
Yuan Ren, Bo Liu, Bing He, Shen Lin, Wei Shi, Yaqiao Luo, Da Wang, Siqi Shi; Portraying the ionic transport and stability window of solid electrolytes by incorporating bond valence-Ewald with dynamically determined decomposition methods. Appl. Phys. Lett. 24 October 2022; 121 (17): 173904. https://doi.org/10.1063/5.0117286
Download citation file: