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A Morphologically Stable Li/Electrolyte Interface for All-Solid-State Batteries Enabled by 3D-Micropatterned Garnet

Journal Article · · Advanced Materials
 [1];  [1];  [1];  [1];  [2];  [1];  [1];  [1];  [3]
  1. Stanford Univ., CA (United States)
  2. Stanford Univ., CA (United States); The College Preparatory School, Oakland, CA (United States)
  3. Stanford Univ., CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
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Morphological degradation at the Li/solid-state electrolyte (SSE) interface is a prevalent issue causing performance fading of all-solid-state batteries (ASSBs). To maintain the interfacial integrity, most ASSBs are operated under low current density with considerable stack pressure, which significantly limits their widespread usage. In this work, a novel 3D-micropatterned SSE (3D-SSE) that can stabilize the morphology of the Li/SSE interface even under relatively high current density and limited stack pressure is reported. Under the pressure of 1.0 MPa, the Li symmetric cell using a garnet-type 3D-SSE fabricated by laser machining shows a high critical current density of 0.7 mA cm–2 and stable cycling over 500 h under 0.5 mA cm–2. This excellent performance is attributed to the reduced local current density and amplified mechanical stress at the Li/3D-SSE interface. These two effects can benefit the flux balance between Li stripping and creep at the interface, thereby pre-venting interfacial degradation such as void formation and dendrite growth.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Engineering & Technology; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
DOE Contract Number:
AC02-76SF00515
OSTI ID:
1882908
Journal Information:
Advanced Materials, Vol. 33, Issue 49; ISSN 0935-9648
Publisher:
Wiley
Country of Publication:
United States
Language:
English

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3D-micropatterned garnet
all-solid-state batteries
electrochemomechanics
interfacial degradation
solid-state electrolytes
void formation