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An epoxy-reinforced ceramic sheet as a durable solid electrolyte for solid state Na-ion batteries

Journal Article · · Journal of Materials Chemistry. A
DOI:https://doi.org/10.1039/d0ta06024k· OSTI ID:1686090
 [1];  [2];  [1];  [1];  [2];  [1]
  1. Ulsan National Institute of Science and Technology, Ulsan (Korea, Republic of)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
+ Show Author Affiliations
In a conventional Na-ion battery system using liquid electrolyte, there are critical safety issues due to the instability of the liquid electrolyte. Na3Zr2Si2PO12 (NASICON) solid electrolyte is a material that is sufficient to replace a liquid electrolyte as it has high ionic conductivity and thermal and electrochemical stability. However, as there is a large interfacial resistance in the NASICON solid electrolyte powder, even when used in combination with a polymer electrolyte, the advantageous effects of ceramics are not easily exhibited. In this study, we propose a top-down method of combining a polymer with a ceramic in which an ion transport channel is previously formed. In this method, a NASICON solid electrolyte is partially sintered to form ion transport channels. Then the NASICON solid electrolyte pores are filled with an epoxy polymer to increase the strength of the epoxy-NASICON composite electrolyte. This method demonstrates the possibility of our composite electrolyte being used as a thin and strong film. As a result of our methods, the ionic conductivity and thermal and electrochemical stability of NASICON were maintained, while the physical strength was enhanced by approximately 2 times. In addition, a capacity of 120 mA h g-1 and stability of 20 cycles were confirmed in a half cell with a Na3V2(PO4)3 cathode and Na metal. This method proposes a new direction for research regarding composite electrolytes created using an oxide-based solid electrolyte.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office. Battery Materials Research (BMR) Program; National Research Foundation (NRF) of Korea
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1686090
Alternate ID(s):
OSTI ID: 1639122
Journal Information:
Journal of Materials Chemistry. A, Journal Name: Journal of Materials Chemistry. A Journal Issue: 29 Vol. 8; ISSN 2050-7488
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

25 ENERGY STORAGE
Na-ion batteries
Oxide solid electrolyte
all-solid-state batteries
ceramic electrolyte
epoxy polymer