Insights into Sodium Ion Transfer at the Na/NASICON Interface Improved by Uniaxial Compression

Yasuhiro Uchida, Joji Hasegawa, Kazunari Shima, Miki Inada, Naoya Enomoto, Hirofumi Akamatsu, Katsuro Hayashi

研究成果: ジャーナルへの寄稿記事

抄録

A robust ceramic solid electrolyte with high ionic conductivity is a key component for all-solid-state batteries (ASSBs). In terms of the demand for high-energy-density storage, researchers have been tackling various challenges to use metal anodes, where a fundamental understanding on the metal/solid electrolyte interface is of particular importance. The Na + superionic conductor, so-called NASICON, has high potential for application to ASSBs with a Na anode due to its high Na + ion conductivity at room temperature, which has, however, faced a daunting issue of the significantly large interfacial resistance between Na and NASICON. In this work, we have successfully reduced the interfacial resistance as low as 14 ω cm 2 at room temperature by a simple mechanical compression of a Na/NASICON assembly. We also demonstrate a fundamental study of the Na/NASICON interface in comparison with the Na/β′′-alumina counterpart by means of the electrochemical impedance technique, which elucidates a stark difference between the activation energies for interfacial charge transfer: ∼0.6 eV for Na/NASICON and ∼0.3 eV for Na/β′′-alumina. This result suggests the formation of a Na + -conductive interphase layer in pressing Na metal on the NASICON surface at room temperature.

元の言語英語
ページ(範囲)2913-2920
ページ数8
ジャーナルACS Applied Energy Materials
2
発行部数4
DOI
出版物ステータス出版済み - 4 22 2019

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Aluminum Oxide
Sodium
Solid electrolytes
Ions
Metal pressing
Anodes
Alumina
Metals
Ionic conductivity
Temperature
Charge transfer
Activation energy

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Chemical Engineering (miscellaneous)
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

これを引用

Insights into Sodium Ion Transfer at the Na/NASICON Interface Improved by Uniaxial Compression. / Uchida, Yasuhiro; Hasegawa, Joji; Shima, Kazunari; Inada, Miki; Enomoto, Naoya; Akamatsu, Hirofumi; Hayashi, Katsuro.

:: ACS Applied Energy Materials, 巻 2, 番号 4, 22.04.2019, p. 2913-2920.

研究成果: ジャーナルへの寄稿記事

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