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Article: From ion to atom to dendrite: Formation and nanomechanical behavior of electrodeposited lithium

TitleFrom ion to atom to dendrite: Formation and nanomechanical behavior of electrodeposited lithium
Authors
Issue Date2020
Citation
MRS Bulletin, 2020, v. 45, n. 11, p. 891-904 How to Cite?
AbstractDevelopment of high energy density solid-state batteries with Li metal anodes has been limited by uncontrollable growth of Li dendrites in liquid and solid electrolytes (SEs). This, in part, may be caused by a dearth of information about mechanical properties of Li, especially at the nano- and microlength scales and microstructures relevant to Li batteries. We investigate Li electrodeposited in a commercial LiCoO2/LiPON/Cu solid-state thin-film cell, grown in situ in a scanning electron microscope equipped with nanomechanical capabilities. Experiments demonstrate that Li was preferentially deposited at the LiPON/Cu interface along the valleys that mimic the domain boundaries of underlying LiCoO2 (cathode). Cryogenic electron microscopy analysis of electrodeposited Li revealed a single-crystalline microstructure, and in situ nanocompression experiments on nano-pillars with 360-759 nm diameters revealed their average Young's modulus to be 6.76 ± 2.88 GPa with an average yield stress of 16.0 ± 6.82 MPa, sim;24x higher than what has been reported for bulk polycrystalline Li. We discuss mechanical deformation mechanisms, stiffness, and strength of nano-sized electrodeposited Li in the framework of its microstructure and dislocation-governed nanoscale plasticity of crystals, and place it in the parameter space of existing knowledge on small-scale Li mechanics. The enhanced strength of Li at small scales may explain why it can penetrate and fracture through much stiffer and harder SEs than theoretically predicted.
Persistent Identifierhttp://hdl.handle.net/10722/303701
ISSN
2023 Impact Factor: 4.1
2023 SCImago Journal Rankings: 1.102
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorCitrin, Michael A.-
dc.contributor.authorYang, Heng-
dc.contributor.authorNieh, Simon K.-
dc.contributor.authorBerry, Joel-
dc.contributor.authorGao, Wenpei-
dc.contributor.authorPan, Xiaoqing-
dc.contributor.authorSrolovitz, David J.-
dc.contributor.authorGreer, Julia R.-
dc.date.accessioned2021-09-15T08:25:50Z-
dc.date.available2021-09-15T08:25:50Z-
dc.date.issued2020-
dc.identifier.citationMRS Bulletin, 2020, v. 45, n. 11, p. 891-904-
dc.identifier.issn0883-7694-
dc.identifier.urihttp://hdl.handle.net/10722/303701-
dc.description.abstractDevelopment of high energy density solid-state batteries with Li metal anodes has been limited by uncontrollable growth of Li dendrites in liquid and solid electrolytes (SEs). This, in part, may be caused by a dearth of information about mechanical properties of Li, especially at the nano- and microlength scales and microstructures relevant to Li batteries. We investigate Li electrodeposited in a commercial LiCoO2/LiPON/Cu solid-state thin-film cell, grown in situ in a scanning electron microscope equipped with nanomechanical capabilities. Experiments demonstrate that Li was preferentially deposited at the LiPON/Cu interface along the valleys that mimic the domain boundaries of underlying LiCoO2 (cathode). Cryogenic electron microscopy analysis of electrodeposited Li revealed a single-crystalline microstructure, and in situ nanocompression experiments on nano-pillars with 360-759 nm diameters revealed their average Young's modulus to be 6.76 ± 2.88 GPa with an average yield stress of 16.0 ± 6.82 MPa, sim;24x higher than what has been reported for bulk polycrystalline Li. We discuss mechanical deformation mechanisms, stiffness, and strength of nano-sized electrodeposited Li in the framework of its microstructure and dislocation-governed nanoscale plasticity of crystals, and place it in the parameter space of existing knowledge on small-scale Li mechanics. The enhanced strength of Li at small scales may explain why it can penetrate and fracture through much stiffer and harder SEs than theoretically predicted.-
dc.languageeng-
dc.relation.ispartofMRS Bulletin-
dc.titleFrom ion to atom to dendrite: Formation and nanomechanical behavior of electrodeposited lithium-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1557/mrs.2020.148-
dc.identifier.scopuseid_2-s2.0-85091789181-
dc.identifier.volume45-
dc.identifier.issue11-
dc.identifier.spage891-
dc.identifier.epage904-
dc.identifier.isiWOS:000588034000009-

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