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Recent Progress in Understanding Solid Electrolyte Interphase on Lithium Metal Anodes

Journal Article · · Advanced Energy Materials
 [1];  [1];  [2];  [1];  [1]
  1. Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
  2. Environmental and Molecular Sciences Laboratory Pacific Northwest National Laboratory Richland WA 99354 USA
Abstract

Lithium metal batteries (LMBs) are one of the most promising candidates for next‐generation high‐energy‐density rechargeable batteries. Solid electrolyte interphase (SEI) on Li metal anodes plays a significant role in influencing the Li deposition morphology and the cycle life of LMBs. However, a thorough understanding on the mechanisms of SEI formation and evolution is still inadequate. In this review, the progress in understanding structures, properties, and influencing factors of SEI, as well as efficient strategies of tailoring SEI are focused upon. First, the compositions, models, and recent progress in characterizing atomic structures of SEI are summarized. Second, the properties of SEI, including electronic conduction, ionic conduction, stability, and mechanical properties are elucidated. Structures and properties of SEI are greatly affected by multiple factors, thus interactions between these factors and SEI are systematically discussed. Correlations of SEI with Li deposition morphology, rate capability, and cycle life are further summarized. Moreover, efficient strategies of tailoring SEI with desired properties, including in situ SEI and ex situ SEI, are also reviewed. Finally, future directions, including in‐operando techniques, multi‐modality approaches for characterization of SEI, and artificial intelligence assisted understanding of correlations between electrolyte components and SEI properties are proposed.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1804553
Alternate ID(s):
OSTI ID: 1764981
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 5 Vol. 11; ISSN 1614-6832
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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Recent progress in understanding solid electrolyte interphase on lithium metal anode
Journal Article · Wed Feb 03 23:00:00 EST 2021 · Advanced Energy Materials · OSTI ID:1764981

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