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Size-Dependent Chemomechanical Failure of Sulfide Solid Electrolyte Particles during Electrochemical Reaction with Lithium

Journal Article · · Nano Letters
 [1];  [2];  [3];  [3];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [4];  [3];  [1];  [1];  [2];  [5]
  1. Yanshan University, Qinhuangdao (China)
  2. Ulsan National Institute of Science and Technology (UNIST), Ulsan (Korea, Republic of)
  3. Xiamen University (China)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. Yanshan University, Qinhuangdao (China); Xiangtan University (China)
+ Show Author Affiliations
The very high ionic conductivity of Li10GeP2S12 (LGPS) solid electrolyte (SE) makes it a promising candidate SE for solid-state batteries in electrical vehicles. However, chemomechanical failure, whose mechanism remains unclear, has plagued its widespread applications. Here, we report in situ imaging lithiation-induced failure of LGPS SE. In this work, we revealed a strong size effect in the chemomechanical failure of LGPS particles: namely, when the particle size is greater than 3 μm, fracture/pulverization occurred; when the particle size is between 1 and 3 μm, microcracks emerged; when the particle size is less than 1 μm, no chemomechanical failure was observed. This strong size effect is interpreted by the interplay between elastic energy storage and dissipation. Our finding has important implications for the design of high-performance LGPS SE, for example, by reducing the particle size to less than 1 μm the chemomechanical failure of LGPS SE can be mitigated.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); National Natural Science Foundation of China (NSFC); Beijing Natural Science Foundation; Fok Ying-Tong Education Foundation of China; Natural Science Foundation of Hebei Province; Hunan Innovation Team; Institute for Basic Science, South Korea
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1960387
Journal Information:
Nano Letters, Journal Name: Nano Letters Journal Issue: 1 Vol. 22; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

25 ENERGY STORAGE
chemomechanical failure
size effect
solid-state batteries
sulfide solid electrolyte