Spatially resolved structural order in low-temperature liquid electrolyte.

Autor: Xie Y; Department of Nuclear Engineering, University of California, Berkeley, Berkeley, CA 94720, USA.; National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA., Wang J; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.; Department of Materials Science and Engineering, Stanford University, Palo Alto, CA 94305, USA., Savitzky BH; National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA., Chen Z; Department of Mechanical Engineering and Materials Science, Yale University, New Haven, CT 06511, USA., Wang Y; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA., Betzler S; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA., Bustillo K; National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA., Persson K; Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.; Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA 94720, USA., Cui Y; Department of Materials Science and Engineering, Stanford University, Palo Alto, CA 94305, USA., Wang LW; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA., Ophus C; National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA., Ercius P; National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA., Zheng H; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.; Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA 94720, USA.
Jazyk: angličtina
Zdroj: Science advances [Sci Adv] 2023 Jan 13; Vol. 9 (2), pp. eadc9721. Date of Electronic Publication: 2023 Jan 13.
DOI: 10.1126/sciadv.adc9721
Abstrakt: Determining the degree and the spatial extent of structural order in liquids is a grand challenge. Here, we are able to resolve the structural order in a model organic electrolyte of 1 M lithium hexafluorophosphate (LiPF 6 ) dissolved in 1:1 (v/v) ethylene carbonate:diethylcarbonate by developing an integrated method of liquid-phase transmission electron microscopy (TEM), cryo-TEM operated at -30°C, four-dimensional scanning TEM, and data analysis based on deep learning. This study reveals the presence of short-range order (SRO) in the high-salt concentration domains of the liquid electrolyte from liquid phase separation at the low temperature. Molecular dynamics simulations suggest the SRO originates from the Li + -(PF 6 - ) n ( n  > 2) local structural order induced by high LiPF 6 salt concentration.
Databáze: MEDLINE
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