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김영식

Kim, Youngsik
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Na ion- Conducting Ceramic as Solid Electrolyte for Rechargeable Seawater Batteries

Author(s)
Kim, YongilKim, HyojinPark, SangminSeo, InseokKim, Youngsik
Issued Date
2016-02
DOI
10.1016/j.electacta.2016.01.054
URI
https://scholarworks.unist.ac.kr/handle/201301/18921
Fulltext
https://www.sciencedirect.com/science/article/pii/S0013468616300548?via%3Dihub
Citation
ELECTROCHIMICA ACTA, v.191, pp.1 - 7
Abstract
This study describes the assembly of a rechargeable seawater battery using hard carbon as the anode, seawater as the cathode, and a fast Na ion-conducting ceramic as the solid electrolyte. Two different Na ion-conducting ceramics, beta ''-Al2O3 and Na3Zr2Si2PO12 (NASICON), are used as the solid electrolytes in this study. The discharge capacity of the seawater battery with the NASICON solid electrolyte is 120 mAh g(-1) after the first cycle and over 91% coulombic efficiency after twenty cycles. However, under the same experimental conditions, the discharge capacity of the seawater battery with a beta ''-Al2O3 electrolyte significantly drops to 10 mAh g(-1) after one cycle. It is observed that the stability of NASICON in seawater is superior to that of beta ''-Al2O3 and impedance results of NASICON are not changed significantly compared to that of beta ''- Al2O3 after cycling tests. The stability of Na ion- conducting ceramics in seawater and their effects on the electrochemical performance of seawater batteries are presented and discussed. (C) 2016 Elsevier Ltd. All rights reserved
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
ISSN
0013-4686
Keyword (Author)
beta &apos&apos- Al2O3Na-ion conducting ceramicNASICONSeawater battery
Keyword
HYDRONIUM BETA-ALUMINAENERGY-STORAGEWATERNASICONSODIUMCHALLENGESLITHIUMREACTIVITYOXYGEN

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