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In Situ Measurements of the Mechanical Properties of Electrochemically Deposited Li₂CO₃ and Li₂O Nanorods

Ye, Hongjun; Gui, Siwei; Wang, Zaifa; Chen, Jingzhao; Liu, Qiunan; Zhang, Xuedong; Jia, Peng; Tang, Yushu ORCID iD icon; Yang, Tingting; Du, Congcong; Geng, Lin; Li, Hui; Dai, Qiushi; Tang, Yongfu; Zhang, Liqiang; Yang, Hui; Huang, Jianyu


Solid-electrolyte interface (SEI) is “the most important but least understood (component) in rechargeable Li-ion batteries”. The ideal SEI requires high elastic strength and can resist the penetration of a Li dendrite mechanically, which is vital for inhibiting the dendrite growth in lithium batteries. Even though Li$_{2}$CO$_{3}$ and Li$_{2}$O are identified as the major components of SEI, their mechanical properties are not well understood. Herein, SEI-related materials such as Li$_{2}$CO$_{3}$ and Li$_{2}$O were electrochemically deposited using an environmental transmission electron microscopy (ETEM), and their mechanical properties were assessed by in situ atomic force microscopy (AFM) and inverse finite element simulations. Both Li$_{2}$CO$_{3}$ and Li$_{2}$O exhibit nanocrystalline structures and good plasticity. The ultimate strength of Li$_{2}$CO$_{3}$ ranges from 192 to 330 MPa, while that of Li$_{2}$O is less than 100 MPa. These results provide a new understanding of the SEI and its related dendritic problems in lithium batteries.

Postprint §
DOI: 10.5445/IR/1000141946
Veröffentlicht am 06.12.2022
DOI: 10.1021/acsami.1c13732
Zitationen: 8
Web of Science
Zitationen: 7
Zitationen: 9
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 09.2021
Sprache Englisch
Identifikator ISSN: 1944-8244, 1944-8252
KITopen-ID: 1000141946
HGF-Programm 43.35.01 (POF IV, LK 01) Platform for Correlative, In Situ & Operando Charakterizat.
Erschienen in ACS applied materials & interfaces
Verlag American Chemical Society (ACS)
Band 13
Heft 37
Seiten 44479–44487
Vorab online veröffentlicht am 13.09.2021
Nachgewiesen in Dimensions
Web of Science
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