Suppression of Leakage Current in Proton-Conducting BaZr0.8Y0.2O3−δ Electrolyte by Forming Hole-Blocking Layer
Suppression of Leakage Current in Proton-Conducting BaZr0.8Y0.2O3−δ Electrolyte by Forming Hole-Blocking Layer
复制标题
通过形成空穴阻挡层抑制质子传导BaZr0.8Y0.2O3−δ电解质中的漏电流
DOI：
10.1149/1945-7111/ab904f
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发表时间：
2020
影响因子：
3.9
通讯作者：
K. Sasaki
中科院分区：
文献类型：
--
作者：
Y. Matsuzaki;Y. Tachikawa;Y. Baba;Koki Sato;Gen Kojo;Hiroki Matsuo;J. Otomo;H. Matsumoto;S. Taniguchi;K. Sasaki
固体氧化物燃料电池（SOFC）以质子传导固体电解质代替氧化物离子传导固体电解质，由于其具有降低工作温度和提高电效率的潜力而受到人们的关注。此外，具有多级电化学氧化结构的质子传导SOFC将是具有极高电效率的有前途的技术。然而，已知在相对高的温度下，在典型的质子传导固体氧化物电解质中存在除质子之外的不可忽略的电荷载流子。空穴和/或电子的部分导电性的存在将导致内部泄漏电流，该内部泄漏电流消耗燃料但从不产生任何电功率输出。泄漏电流与外部电流的比率越高，电效率越差。在本研究中，通过使用材料的部分导电的电化学参数，研究了在由BaZr0.8Y0.2O3-δ（BZY 82）组成的基础电解质层的空气侧表面上形成的阻挡层对抑制漏电流的效果。化学势分布和漏电流表现出很大的依赖性的阻挡层的材料。钨酸镧被发现发挥作用，作为独特的和强大的阻挡层对漏电流。
Solid oxide fuel cells (SOFCs) with proton-conducting solid electrolyte, instead of the oxide-ion conducting solid electrolyte have attracted attentions because of their high potential to reduce operating temperatures and to enhance the electrical efficiencies of SOFCs. In addition, the proton-conducting SOFCs with multistage electrochemical oxidation configuration will be promising technology for critically-high electric efficiencies. However, it is known that there are non-negligible charge-carriers other than protons in typical proton-conducting solid oxide electrolytes at relatively high temperatures. The existence of the partial conductivities of holes and/or electrons will cause the internal leakage current that consumes fuel but never generates any electrical power output. The higher ratio of the leakage current to external current will more deteriorate the electrical efficiency. In this study, the effects of blocking-layers formed on the air side surface of base electrolyte layer consisting of BaZr 0.8 Y 0.2 O 3− δ (BZY82) for suppressing the leakage current have been investigated by using electrochemical parameters of the partial conduction of the materials. The chemical potential profile and leakage current showed large dependence on the material of the blocking-layer. Lanthanum tungstate was found to play a role as unique and strong blocking-layer against the leakage current.
影响因子：
3.2
作者：
Masatsugu Oishi;Satoshi Akoshima;K. Yashiro;Kazuhisa Sato;J. Mizusaki;T. Kawada
通讯作者：
Masatsugu Oishi;Satoshi Akoshima;K. Yashiro;Kazuhisa Sato;J. Mizusaki;T. Kawada
薄双层电解质对阳极支撑质子传导固体氧化物燃料电池性能的影响
DOI：
--
发表时间：
2019
期刊：
影响因子：
--
作者：
Hiroki Matsuo;Junichiro Otomo
通讯作者：
Junichiro Otomo
使用高La/W比的钨酸镧的质子传导固体氧化物燃料电池的材料和电池设计
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
Gen Kojo;Reina Reinga Tsukimura;Yoshio Matsuzaki;Junichiro Otomo
通讯作者：
Junichiro Otomo