On the formation and properties of amorphous and crystalline Li 3-y Ba y/ 2 OCl electrolytes

• Type: Article in International Scientific Journal
• Date: 2024

Authors

Junquan Ou (Author) Other; Vignyatha Tatagari (Author) Other; Ishani Senevirathna (Author) Other; Sudarshan Luitel (Author) Other; Carlo Segre (Author) Other; Leon L Shaw (Author) Other; M. Helena Braga (Author) FEUP

Journal

Title: Journal of Power Sources

Serial No. 234685 Vol. 609

ISSN: 0378-7753

Publisher: Elsevier

Indexing

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Other information

Authenticus ID: P-010-E7B

DOI: 10.1016/j.jpowsour.2024.234685

Abstract (EN): All -solid-state batteries (ASSBs) have potential to provide higher specific energy, higher power, and longer cycle life than Li -ion batteries (LIBs) for continuously increasing demands of high-performance rechargeable batteries with intrinsic safety. However, one of the barriers for successful design and fabrication of ASSBs is the lack of solid-state electrolytes (SSEs) that can meet multi -functional requirements for ASSBs. To address this issue, the present study investigates hydrothermal synthesis of amorphous and crystalline Ba-doped Li 3 OCl solid electrolytes and develops the understanding of the relationships between the synthesis conditions and electrochemical properties of the products. It is shown that the formation of an amorphous/crystalline Ba-doped Li 3 OCl mixture with little hydroxide impurities depends strongly on the hydrothermal reaction temperature, drying temperature, Ba concentration, and rate of removing OH - and H + ions as steam from water solvated Ba-doped Li 3 OCl. The key to generate amorphous Li 3 OCl-based electrolytes with high ionic conductivities (7.65 x 10 -3 S/cm) at room temperature is to create non -equilibrium synthesis conditions such as the one identified in this study. The understanding developed in this study will offer critical guidelines for synthesizing amorphous and crystalline Li 3 OCl-based electrolytes with superior electrochemical properties for ASSBs reliably and reproducibly in the near future.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8