Regulating Key Variables and Visualizing Lithium Dendrite Growth: An Operando X-ray Study

Seung Ho Yu, Xin Huang, Joel D. Brock, Héctor D. Abruña

Research output: Contribution to journalArticlepeer-review

97 Citations (Scopus)

Abstract

Although Li metal has long been considered to be the ideal anode material for Li rechargeable batteries, our limited understanding of the complex mechanism of Li plating has hindered the widespread deployment of Li metal anodes. Therefore, operando studies are required to unambiguously reveal the complex mechanistic steps involved. In this study, we employed synchrotron-based X-ray imaging methods to visualize the evolution of Li plating/stripping under operando and, more importantly, practical conditions for battery operation, providing detailed insights into morphology evolution during Li plating. The effects of critical battery operating parameters, including concentration of Li salts, current density, ionic strength, and various electrolytes and additives, on Li plating/stripping have been studied. The delicate interplay of these conditions on the resulting Li metal morphology has been characterized for the first time.

Original languageEnglish
Pages (from-to)8441-8449
Number of pages9
JournalJournal of the American Chemical Society
Volume141
Issue number21
DOIs
Publication statusPublished - 2019 May 29

Bibliographical note

Funding Information:
The authors gratefully thank Rong Huang for the experimental support in F3 beamline. The authors appreciate Prof. Kisuk Kang and Prof. Peng Bai for fruitful discussions. This work is based upon research conducted at the Cornell High Energy Synchrotron Source (CHESS), which is supported by the National Science Foundation and the National Institutes of Health/National Institute of General Medical Sciences under NSF award DMR-1332208. S.-H.Y. and X.H. acknowledge support from CHESS and the Energy Materials Center at Cornell (EMC2). EMC2 is an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DESC0001086. This work was supported in part (S.-H.Y.) by alpha-en Inc.

Funding Information:
This work is based upon research conducted at the Cornell High Energy Synchrotron Source (CHESS), which is supported by the National Science Foundation and the National Institutes of Health/National Institute of General Medical Sciences under NSF award DMR-1332208. S.-H.Y. and X.H. acknowledge support from CHESS and the Energy Materials Center at Cornell (EMC2). EMC2 is an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science Office of Basic Energy Sciences under Award Number DE-SC0001086.

Publisher Copyright:
© 2019 American Chemical Society.

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry

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