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Visualizing Lithium Dendrite Formation within Solid-State Electrolytes

Journal Article · · ACS Energy Letters
 [1];  [2];  [3];  [1];  [1];  [1];  [1];  [1];  [4];  [1];  [1];  [1];  [4];  [5];  [6];  [3]
  1. Zhejiang Univ., Hangzhou (China)
  2. College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
  3. Argonne National Lab. (ANL), Lemont, IL (United States)
  4. Contemporary Amperex Technology, Ningde (China)
  5. Zhejiang Univ. of Technology, Hangzhou (China)
  6. Zhejiang Univ., Hangzhou (China); Research Institute, Ningde (China)
+ Show Author Affiliations
Solid-state electrolyte (SSE) is promising for application in allsolid-state lithium metal batteries because of its reliable safety and longevity. The failure of SSE to suppress dendrite formation of Li metal anodes has been conventionally explained by uneven Li deposition at Li/SSE interfaces and its subsequent dendritic growth. While Li deposition within SSE has been recently proposed as another key cause for SSE failure, little is known regarding the Li growth details inside the SSE itself. In this work, we performed in situ microscopic observation of Li deposition inside the SSE and obtained visualized evidence regarding the dynamic process of Li dendrite formation and growth. Here, Li is seen to directly nucleate and propagate within the SSE, leading to its structural cracking. Such behavior should be caused by the presence of P- and S-based crystalline defects in Li3PS4 SSE, which is consistent with the cryo-transmission electron microscopy observations and theoretical calculations. This observation provides important insights into the growth mechanisms of Li dendrites within a working lithium battery.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Key R&D Program of China; US-China Clean Energy Research Centre (CERCCVC2); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1778168
Journal Information:
ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 2 Vol. 6; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Defects in solids
Dendrons
Deposition
Genetics
Ions