材料科学
电解质
氧化物
拉曼光谱
质子
电解
快离子导体
热重分析
离子键合
陶瓷
化学稳定性
化学工程
中子衍射
分析化学(期刊)
离子电导率
电导率
物理化学
结晶学
离子
晶体结构
电极
化学
复合材料
物理
工程类
光学
有机化学
量子力学
冶金
色谱法
作者
Ryan Murphy,Yucun Zhou,Lei Zhang,Luke Soule,Weilin Zhang,Yu Chen,Meilin Liu
标识
DOI:10.1002/adfm.202002265
摘要
Abstract Reversible solid oxide cells based on ceramic proton conductors have potential to be the most efficient system for large‐scale energy storage. The performance and long‐term durability of these systems, however, are often limited by the ionic conductivity or stability of the proton‐conducting electrolyte. Here new family of solid oxide electrolytes, BaHf x Ce 0.8− x Y 0.1 Yb 0.1 O 3− δ (BHCYYb), which demonstrate a superior ionic conductivity to stability trade‐off than the state‐of‐the‐art proton conductors, BaZr x Ce 0.8− x Y 0.1 Yb 0.1 O 3− δ (BZCYYb), at similar Zr/Hf concentrations, as confirmed by thermogravimetric analysis, Raman, and X‐ray diffraction analysis of samples over 500 h of testing are reported. The increase in performance is revealed through thermodynamic arguments and first‐principle calculations. In addition, lab scale full cells are fabricated, demonstrating high peak power densities of 1.1, 1.4, and 1.6 W cm −2 at 600, 650, and 700 °C, respectively. Round‐trip efficiencies for steam electrolysis at 1 A cm −2 are 78%, 72%, and 62% at 700, 650, and 600 °C, respectively. Finally, CO 2 H 2 O electrolysis is carried out for over 700 h with no degradation.
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