TY - JOUR
T1 - Direct Detection of Lithium Exchange across the Solid Electrolyte Interphase by 7Li Chemical Exchange Saturation Transfer
AU - Columbus, David
AU - Arunachalam, Vaishali
AU - Glang, Felix
AU - Avram, Liat
AU - Haber, Shira
AU - Zohar, Arava
AU - Zaiss, Moritz
AU - Leskes, Michal
N1 - Publisher Copyright: © 2022 American Chemical Society. All rights reserved.
PY - 2022/6/8
Y1 - 2022/6/8
N2 - Lithium metal anodes offer a huge leap in the energy density of batteries, yet their implementation is limited by solid electrolyte interphase (SEI) formation and dendrite deposition. A key challenge in developing electrolytes leading to the SEI with beneficial properties is the lack of experimental approaches for directly probing the ionic permeability of the SEI. Here, we introduce lithium chemical exchange saturation transfer (Li-CEST) as an efficient nuclear magnetic resonance (NMR) approach for detecting the otherwise invisible process of Li exchange across the metal-SEI interface. In Li-CEST, the properties of the undetectable SEI are encoded in the NMR signal of the metal resonance through their exchange process. We benefit from the high surface area of lithium dendrites and are able, for the first time, to detect exchange across solid phases through CEST. Analytical Bloch-McConnell models allow us to compare the SEI permeability formed in different electrolytes, making the presented Li-CEST approach a powerful tool for designing electrolytes for metal-based batteries.
AB - Lithium metal anodes offer a huge leap in the energy density of batteries, yet their implementation is limited by solid electrolyte interphase (SEI) formation and dendrite deposition. A key challenge in developing electrolytes leading to the SEI with beneficial properties is the lack of experimental approaches for directly probing the ionic permeability of the SEI. Here, we introduce lithium chemical exchange saturation transfer (Li-CEST) as an efficient nuclear magnetic resonance (NMR) approach for detecting the otherwise invisible process of Li exchange across the metal-SEI interface. In Li-CEST, the properties of the undetectable SEI are encoded in the NMR signal of the metal resonance through their exchange process. We benefit from the high surface area of lithium dendrites and are able, for the first time, to detect exchange across solid phases through CEST. Analytical Bloch-McConnell models allow us to compare the SEI permeability formed in different electrolytes, making the presented Li-CEST approach a powerful tool for designing electrolytes for metal-based batteries.
UR - http://www.scopus.com/inward/record.url?scp=85131772476&partnerID=8YFLogxK
U2 - 10.1021/jacs.2c02494
DO - 10.1021/jacs.2c02494
M3 - مقالة
SN - 0002-7863
VL - 144
SP - 9836
EP - 9844
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 22
ER -