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Understanding the Reactivity of a Thin Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 Solid‐State Electrolyte toward Metallic Lithium Anode
Author(s) -
Paolella Andrea,
Zhu Wen,
Xu GuiLiang,
La Monaca Andrea,
Savoie Sylvio,
Girard Gabriel,
Vijh Ashok,
Demers Hendrix,
Perea Alexis,
Delaporte Nicolas,
Guerfi Abdelbast,
Liu Xiang,
Ren Yang,
Sun ChengJun,
Lu Jun,
Amine Khalil,
Zaghib Karim
Publication year - 2020
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.202001497
Subject(s) - materials science , lithium (medication) , reactivity (psychology) , fast ion conductor , electrolyte , x ray photoelectron spectroscopy , lithium battery , metal , chemical engineering , analytical chemistry (journal) , inorganic chemistry , chemistry , electrode , ion , ionic bonding , metallurgy , alternative medicine , medicine , physics , pathology , quantum mechanics , chromatography , engineering , endocrinology
The thickness of solid‐state electrolytes (SSEs) significantly affects the energy density and safety performance of all‐solid‐state lithium batteries. However, a sufficient understanding of the reactivity toward lithium metal of ultrathin SSEs (<100 µm) based on NASICON remains lacking. Herein, for the first time, a self‐standing and ultrathin (70 µm) NASICON‐type Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) electrolyte via a scalable solution process is developed, and X‐ray photoelectron spectroscopy reveals that changes in LAGP at the metastable Li–LAGP interface during battery operation is temperature dependent. Severe germanium reduction and decrease in LAGP particle size are detected at the Li–LAGP interface at elevated temperature. Oriented plating of lithium metal on its preferred (110) face occurs during in situ X‐ray diffraction cycling.