Creep behavior of the solid acid fuel cell material CsHSO4

SCRIPTA MATERIALIA

卷:139

Article

Ginder, Ryan S.¹  Pharr, George M.² 

[1] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[2] Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA

关键词: Compression test;    Creep test;    Fuel cell materials;    Solid electrolytes;    Solid acids;   

DOI  :  10.1016/j.scriptamat.2017.06.019

来源: Elsevier

【 摘 要 】

Solid acid materials have recently shown great promise as solid-state electrolytes in intermediate temperature fuel cells. However, little is currently known about their mechanical properties, some of which could severely limit their application. In this study, the steady state creep behavior of the prototypical solid acid, CsHSO4, is characterized. In its highly conductive superprotonic state (>141 degrees C), the material creeps at very high rates, as high as 10(-2) s(-1), at stresses in the application design range of only a few MPa. The steady state creep stress exponent n congruent to 3.6 and activation energy Q congruent to 1.02 eV = 98.8 kJ/mol are consistent with a dislocation-based creep mechanism. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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