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An Investigation of Chemo-Mechanical Phenomena and Li Metal Penetration in All-Solid-State Lithium Metal Batteries Using In Situ Optical Curvature Measurements

Journal Article · · Advanced Energy Materials
 [1];  [2];  [3];  [4];  [2];  [5]
  1. Brown University, Providence, RI (United States); OSTI
  2. Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)
  3. Samsung Semiconductor, Inc., Cambridge, MA (United States)
  4. General Motors Research and Development Center, Warren, MI (United States)
  5. Brown University, Providence, RI (United States)
+ Show Author Affiliations
Solid-electrolytes (SEs) can provide a pathway to increase energy-density in lithium metal batteries. However, lithium metal penetration through garnet based LLZO solid electrolytes has been identified as a critical failure process. This phenomenon is related to chemo-mechanical processes which are difficult to probe. In particular, characterizing the dynamic mechanical deformations that occur in electrode-SE structures is very challenging. Here study reports in situ curvature measurements that are thus designed to probe chemo-mechanical phenomena that occur during lithium plating. The novel experimental cell configuration created for this work shows that pressure builds up in the Li metal during plating, up until the point where short circuits occur. The resulting data are analyzed with a detailed finite element model (FEM) to quantitatively evaluate stress evolution. The results show that Li metal plating within a surface flaw can produce stress build-up prior to short-circuiting. The combined results from both the experiments and the FEM suggest that it is critical to minimize surface defects and flaws during the manufacturing processes.
Research Organization:
Brown University, Providence, RI (United States); General Motors LLC, Detroit, MI (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0008863
OSTI ID:
1976248
Alternate ID(s):
OSTI ID: 1866845
OSTI ID: 23157760
OSTI ID: 1999173
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 19 Vol. 12; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

25 ENERGY STORAGE
Li Penetration
Li metal
Li-ion battery
Li7La3Zr2O12
dendrite
electro-chemo mechanics
in-situ
solid electrolyte
solid-state battery