Investigation of the stability of NASICON-type solid electrolyte in neutral-alkaline aqueous solutions

被引：16

作者：

Hou, Minjie ^{[1
]}

Qu, Tao ^{[1
,2
]}

Zhang, Qingkai ^{[1
]}

Yao Yaochun ^{[1
]}

Dai, Yongnian ^{[1
]}

Liang, Feng ^{[1
,2
]}

Okuma, Gaku ^{[3
]}

Hayashi, Katsuro ^{[4
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China

[2] Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Yunnan, Peoples R China

[3] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[4] Kyushu Univ, Fac Engn, Dept Appl Chem, Fukuoka 8190395, Japan

来源：

CORROSION SCIENCE | 2020年 / 177卷

基金：

中国国家自然科学基金;

关键词：

NASICON; Hydration; Resistance; Corrosion mechanism; Stability; WATER; CELL; NA;

D O I：

10.1016/j.corsci.2020.109012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：8

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