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Extending the Electrochemical Window of Na+ Halide Nanocomposite Solid Electrolytes for 5V-Class All-Solid-State Na-Ion Batteries
- Authors
- Park, Juhyoun; Han, Daseul; Son, Jun Pyo; Kwak, Hiram; Ko, Wonseok; Park, Changhyun; Lee, Chanhee; Lee, Hyun-Wook; Kim, Jongsoon; Nam, Kyung-Wan; Jung, Yoon Seok
- Issue Date
- Apr-2024
- Publisher
- American Chemical Society
- Keywords
- Distribution Functions; High Resolution Transmission Electron Microscopy; Manganese Compounds; Nanocomposites; Nickel Compounds; Sodium Compounds; Sodium-ion Batteries; Solid Electrolytes; X Ray Absorption Spectroscopy; Zirconia; % Reductions; All-solid State; Electrochemical Window; Fine Structures; Mechanochemical Reactions; Na-ion Batteries; Nanocomposite Solids; Pair-distribution Function Analysis; Structural Insights; Synthesised; Chlorine Compounds
- Citation
- ACS Energy Letters, v.9, no.5, pp 2222 - 2230
- Pages
- 9
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS Energy Letters
- Volume
- 9
- Number
- 5
- Start Page
- 2222
- End Page
- 2230
- ISSN
- 2380-8195
2380-8195
- Abstract
- This study introduces a Na+ fluorinated halide nanocomposite solid electrolyte (HNSE), ZrO2-2Na(2)ZrCl(5)F, synthesized through a mechanochemical reaction using Na2O. This HNSE exhibits a substantial improvement in Na+ conductivity (2.1 x 10(-5) S cm(-1) at 30 degrees C) compared to Na2ZrCl5F (2.0 x 10(-7) S cm(-1)). The significant reduction in ionic conductivity of Na2ZrCl5F relative to Na2ZrCl6 (2.0 x 10(-5) S cm(-1)) is elucidated through synchrotron pair distribution function (PDF) analysis. Structural insights, including the fine structure of the ZrO2 nanograins embedded in an amorphous Na2ZrCl5F matrix and the potential O-substituted interphase, are revealed through X-ray absorption spectroscopy, PDF, and cryogenic transmission electron microscopy. Fluorinated HNSEs offer exceptional electrochemical oxidative stability up to 5 V (vs Na/Na+), enabling high-voltage cathode applications. Na0.66Ni0.1Co0.1Mn0.8O2||Na3Sn all-solid-state cells using ZrO2-2Na(2)ZrCl(5)F as the catholyte demonstrate enhanced performance at 30 degrees C compared to cells using Na2ZrCl6 (47.4% capacity retention after 100 cycles vs 35.3% using Na2ZrCl6).
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Related Researcher
- Nam, Kyung Wan
- College of Engineering (Department of Energy and Materials Engineering)