アルカリ金属熱電変換素子の電極性能に関する基礎研究 : 第2報, インピーダンス測定と発電特出
アルカリ金属熱電変換素子の電極性能に関する基礎研究 : 第2報, インピーダンス測定と発電特出
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碱金属热电转换元件电极性能基础研究：第二次报告、阻抗测量和发电特性
DOI：
10.1299/kikaib.57.4229
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Toshihisa Masuda
中科院分区：
文献类型：
--
作者：
Kotaro Tanaka;Akira Negishi;Kenji Nozaki;Toshihisa Masuda
在890-1123K温度范围内，对碱金属热电转换器(AMTEC)进行了直流极化条件下的交流阻抗测量。根据AMTEC系统的等效电路，在复阻抗平面上对获得的数据进行了分析。用所建立的电化学模型计算和逼近了β“氧化铝固体电解液与多孔钼电极界面的电荷转移电阻，计算得到的包括电荷转移电阻影响的电流-电压曲线与实测值吻合较好。用该方法可以完全预测AMTEC的产生特性，这将有助于进一步研究更高效的AMTEC电池。还讨论了碱金属离子传导、接触电阻和通过多孔电极的质量传输的贡献。
A. C. impedance measurement on the alkali metal thermoelectric converter (AMTEC) has been conducted under D. C. polarized conditions in the temperature range from 890-1123K. The obtained data have been analyzed in the complex impedance plane in terms of an equivalent circuit for the AMTEC system. The charge transfer resistance at the interface between the beta"-alumina solid electrolyte (BASE) and porous molybdenum electrodes has been evaluated and approximated by the introduced electrochemical model. The calculated current-voltage curves including the effect of the charge transfer resistance show good agreement with the measured data. The generating characteristics of the AMTEC can be completely predicted by this method, which may be useful for further studies on more efficient AMTEC cells. The contributions of BASE ionic conduction, contact resistance and mass transport through the porous electrode are also discussed.