Mechanically Robust Ultrathin Solid Electrolyte Membranes Using a Porous Net Template for All-Solid-State Batteries

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All-solid-state batteries (ASBs) have been identifiedas a potentialnext-generation technology for safe energy storage. However, the currentpellet form of solid electrolytes (SEs) exhibits low cell-level energydensities and mechanical brittleness, and this has hampered the commercializationof ASBs. In this work, we report on the development of an ultrathinSE membrane that can be reduced to a thickness of 31 mu m withminimal thermal shrinkage at 140 degrees C, while exhibiting robustmechanical properties (tensile strength of 19.6 MPa). Due to its exceptionalionic conductivity of 0.55 mS/cm and the corresponding areal conductanceof 84 mS/cm(2), the SE membrane-incorporated ASB displayscell-level gravimetric and volumetric energy densities of 127.9 Wh/kg(cell) and 140.7 Wh/L-cell, respectively. These valuesrepresent a 7.6- and 5.7-fold increase over those achieved with conventionalSE pellet cells. Our results demonstrate the potential of the developedSE membrane to overcome the critical challenges in the commercializationof ASBs.
Publisher
AMER CHEMICAL SOC
Issue Date
2023-05
Language
English
Article Type
Article
Citation

ACS APPLIED MATERIALS & INTERFACES, v.15, no.23, pp.28064 - 28072

ISSN
1944-8244
DOI
10.1021/acsami.3c03466
URI
http://hdl.handle.net/10203/310059
Appears in Collection
CBE-Journal Papers(저널논문)
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