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Challenges in Lithium Metal Anodes for Solid-State Batteries

Journal Article · · ACS Energy Letters
 [1];  [2];  [3];  [4];  [1];  [5];  [6];  [7];  [7];  [8];  [2];  [9]
  1. Vanderbilt Univ., Nashville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Washington, Seattle, WA (United States)
  4. Univ. of Michigan, Ann Arbor, MI (United States)
  5. Columbia Univ., New York, NY (United States)
  6. G. W. Woodruff School of Mechanical Engineering, Atlanta, GA (United States); School of Materials Science and Engineering, Atlanta, GA (United States)
  7. Purdue Univ., West Lafayette, IN (United States)
  8. Carnegie Mellon Univ., Pittsburgh, PA (United States)
  9. Justus-Liebig-Univ. Giessen (Germany)

In this Perspective, we highlight recent progress and challenges related to the integration of lithium metal anodes in solid-state batteries. While prior reports have suggested that solid electrolytes may be impermeable to lithium metal, this hypothesis has been disproven under a variety of electrolyte compositions and cycling conditions. Herein, we describe the mechanistic origins and importance of lithium filament growth and interphase formation in inorganic and organic solid electrolytes. Multimodal techniques that combine real and reciprocal space imaging and modeling will be necessary to fully understand nonequilibrium dynamics at these buried interfaces. Currently, most studies on lithium electrode kinetics at solid electrolyte interfaces are completed in symmetric Li–Li configurations. To fully understand the challenges and opportunities afforded by Li-metal anodes, full-cell experiments are necessary. Lastly, the impacts of operating conditions on solid-state batteries are largely unknown with respect to pressure, geometry, and break-in protocols. Given the rapid growth of this community and the diverse portfolio of solid electrolytes, we highlight the need for detailed reporting of experimental conditions and standardization of protocols across the community.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); National Science Foundation
Grant/Contract Number:
AC05-00OR22725; AR0000774; AR0000775
OSTI ID:
1606705
Journal Information:
ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 3 Vol. 5; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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