TY - JOUR
T1 - Investigation of the stability of NASICON-type solid electrolyte in neutral-alkaline aqueous solutions
AU - Hou, Minjie
AU - Qu, Tao
AU - Zhang, Qingkai
AU - Yaochun, Yao
AU - Dai, Yongnian
AU - Liang, Feng
AU - Okuma, Gaku
AU - Hayashi, Katsuro
N1 - Funding Information:
This work was financially supported by the National Natural Science Foundation of China ( 51704136 , 11765010 ), the Freely Exploring Fund for Academicians in Yunnan Province ( 2018HA006 ).
Publisher Copyright:
© 2020 Elsevier Ltd
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/12
Y1 - 2020/12
N2 - The effects of aqueous solutions with different pH values on the ionic conductivity of Na3Zr2Si2PO12 (NASICON) are studied at room temperature. The ionic conductivity of NASCION reduced severely in the solution with pH value of 7. The AC impedance method was used to study the changes of the bulk, grain boundary, and cracking surface resistances of the sample under different conditions. The electrolyte morphology, cell parameters, Na+ site occupancy fraction, and microscopic strain change were obtained by SEM and XRD data refinement. According to above analysis, the degradation processes of hydration, grain refinement, and surface cracking were observed gradually, the corresponding corrosion mechanism of NASICON in aqueous solutions was explained.
AB - The effects of aqueous solutions with different pH values on the ionic conductivity of Na3Zr2Si2PO12 (NASICON) are studied at room temperature. The ionic conductivity of NASCION reduced severely in the solution with pH value of 7. The AC impedance method was used to study the changes of the bulk, grain boundary, and cracking surface resistances of the sample under different conditions. The electrolyte morphology, cell parameters, Na+ site occupancy fraction, and microscopic strain change were obtained by SEM and XRD data refinement. According to above analysis, the degradation processes of hydration, grain refinement, and surface cracking were observed gradually, the corresponding corrosion mechanism of NASICON in aqueous solutions was explained.
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U2 - 10.1016/j.corsci.2020.109012
DO - 10.1016/j.corsci.2020.109012
M3 - Article
AN - SCOPUS:85091764471
VL - 177
JO - Corrosion Science
JF - Corrosion Science
SN - 0010-938X
M1 - 109012
ER -