Related Researcher

Author's Photo

Lee, Hyun-Wook
Energy Storage and Electron Microscopy Laboratory
Research Interests
  • Energy storage, secondary batteries, transmission electron microscopy, real time analysis


Chemical Stability and Degradation Mechanism of Solid Electrolytes/Aqueous Media at a Steady State for Long-Lasting Sodium Batteries

DC Field Value Language Wi, Tae-Ung ko Lee, Chanhee ko Rahman, M. Fahmi ko Go, Wooseok ko Kim, Su Hwan ko Hwang, Dae Yeon ko Kwak, Sang Kyu ko Kim, Youngsik ko Lee, Hyun-Wook ko 2021-02-04T07:50:46Z - 2021-01-08 ko 2021-01 ko
dc.identifier.citation CHEMISTRY OF MATERIALS, v.33, no.1, pp.126 - 135 ko
dc.identifier.issn 0897-4756 ko
dc.identifier.uri -
dc.description.abstract Research on the interface between solid electrolytes and electrode materials or catholyte is important to effectively and safely use their high energy densities. However, compared to interfaces with electrode materials, the interface between solid electrolytes and liquid media lacks research. Herein, the stability of NA superionic conductor (NASICON) pellets is studied in various aqueous solutions, including deionized (DI) water and a marine environment, associated with different degradation mechanisms. A representative detrimental hydronium exchange reaction between solid electrolytes and aqueous media is suppressed with increasing concentration and ion types dissolved in the solutions. Results of density functional theory calculation and electron energy loss spectroscopy reveal the different activation energies and chemical bonding states of solid electrolytes based on the aqueous solutions' conditions. NASICON's ionic conductivity decreases to similar to 10(-6) S/cm because of severe changes in aqueous solutions with insufficient dissolved ions resulting in inferior chemical stability. Furthermore, chemical stability variations at a steady state can severely affect battery performance. Seawater batteries fabricated with NASICON in immersed DI water for 1 year exhibit a large resistance region from the first cycle; this system breaks down before 200 h, unlike a cell fabricated using NASICON immersed for 1 year in a marine environment. ko
dc.language 영어 ko
dc.publisher AMER CHEMICAL SOC ko
dc.title Chemical Stability and Degradation Mechanism of Solid Electrolytes/Aqueous Media at a Steady State for Long-Lasting Sodium Batteries ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85099092983 ko
dc.identifier.wosid 000610984700011 ko
dc.type.rims ART ko
dc.identifier.doi 10.1021/acs.chemmater.0c03022 ko
dc.identifier.url ko
Appears in Collections:
ECHE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show simple item record


  • mendeley


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.