Highly Stable Halide-Electrolyte-Based All-Solid-State Li-Se Batteries.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 35365923.
- Also identified by DOI 10.1002/adma.202200856.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Solid-state Li-S and Li-Se batteries are promising devices that can address the safety and electrochemical stability issues that arise from liquid-based systems. However, solid-state Li-Se/S batteries usually present poor cycling stability due to the high resistance interfaces and decomposition of solid electrolytes caused by their narrow electrochemical stability windows. Here, an integrated solid-state Li-Se battery based on a halide Li<sub>3</sub> HoCl<sub>6</sub> solid electrolyte with high ionic conductivity is presented. The intrinsic wide electrochemical stability window of the Li<sub>3</sub> HoCl<sub>6</sub> and its stability toward Se and the lithiated species effectively inhibit degeneration of the electrolyte and the Se cathode by suppressing side reactions. The inherent thermodynamic mechanism of the lithiation/delithiation process of the Se cathode in solid is also revealed and confirmed by theoretical calculations. The battery achieves a reversible capacity of 402 mAh g<sup>-1</sup> after 750 cycles. The electrochemical performance, thermodynamic lithiation/delithiation mechanism, and stability of metal-halide-based Li-Se batteries confer theoretical study and practical applicability that extends to other energy-storage systems.