Improvement of Electrode Performance on the Alkali Metal Thermal to Electric Converter

碱金属热电转换器电极性能的改进

• 批准号: 13680583
• 负责人: TANAKA Kotaro
• 金额: $ 1.6万
• 依托单位: Shizuoka Institute of Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13680583/
• 关键词: Thermoelectric Converter; Direct Energy Conversion; AMTEC; Laser-induced CVD; Molybdenum Electrode; アルカリ金属熱電変換; エネルギー変換; 熱再生型電池

Micron-scale current collection leads for the Alkali Metal Thermal to Electric Converter (AMTEC) have been proposed and discussed in this study. The current collection leads are directly deposited on cathode side surfaces of the solid beta"-alumina electrolyte to eliminate the necessity for the conventional tied-on metal meshes. The new current collection leads also reduce electrical and mass transfer resistance in the cathode side electrodes of the AMTEC devices.The mass transport characteristics of sodium through the porous electrode strongly influence the output performance of the AMTEC cycle. Electrode electrical resistance and contact resistance between the porous electrode and the current collector also cause significant lowered power output in the AMTEC cycle. In order to improve the overall performance, both mass transport and electrical resistance must be improved simultaneously. The micron-scale current leads have a possibility to lower the overall electrical resistance with … More small increase in the mass transport resistance.The sodium exposure test cell (SETC) was newly fabricated and used to measure the mass transfer characteristics in the porous molybdenum electrode. The measured performance was examined and a mass transport model on the electrodes was introduced. On the other hands, the electrical characteristics of the leads were experimentally examined. The current leads of molybdenum were linearly deposited by Ar laser-induced thermal CVD method. The influence of depositing conditions, such as pressure, laser power, and writing speed, on the formed width and thickness of the leads was examined. The electrical resistance was also measured and the measured volumetric resistance of the deposited leads was 4-6 times as high as that of the bulk molybdenum.The analysis based on the measured data was also conducted. Various configurations include optimum width, distance and thickness were calculated. Compared result of the electrode performance having direct deposited current leads with that of the conventional tied-on collector has shown that its power density is about 35% higher even with its low electrical volumetric resistance. The effective of the current lead structure proposed in this study was verified. If the volumetric resistance of the deposited leads can be improved, much higher performance is expected with this method. Less

在本研究中，已经提出并讨论了碱金属热转换器（AMTEC）的微米级电流收集线。 The current collection leads are directly deposited on cathode side surfaces of the solid beta"-alumina electrolyte to eliminate the necessary for the conventional tie-on metal meshes. The new current collection leads also reduce electrical and mass transfer resistance in the cathode side electrodes of the AMTEC devices.The mass transport characteristics of sodium through the porous electrode strongly influence the output performance of the AMTEC cycle. Electrode electrical resistance and contact resistance between the多孔电极和电流收集器在AMTEC循环中还会引起明显的降低功率输出，以改善质量运输，并且必须简单地改善电阻。检查了测得的性能，并引入了电子上的大众传输模型。另一方面，对铅的电特性进行了实验检查。通过AR激光诱导的热CVD方法线性沉积钼的电流导线。检查了沉积条件（例如压力，激光功率和写作速度）对导线形成的宽度和厚度的影响。还测量了电阻，并且沉积铅的测得的体积电阻是大量钼的4-6倍。基于测量的数据的分析也进行了。各种配置包括计算最佳宽度，距离和厚度。将电极性能与传统绑定的收集器的电极性能的结果进行了比较，表明其功率密度也高约35％。验证了本研究中提出的当前铅结构的有效性。如果可以提高沉积铅的体积耐药性，则此方法的性能会更高。较少的

项目成果

Kotaro Tanaka: "Thermal Designing on a Small-Sized AMTEC Cell"Pro.37^<th> Intersociety Energy Conversion Conference. 20021-1-20021-6 (2002)

Kotaro Tanaka：“小型 AMTEC 电池的热设计”Pro.37^<th>国际能源转换会议。

K.Tanaka: "Wick Design Method and Simulation of Sodium recirculation for AMTEC Cycles"Proc. 2^<nd> Waste Heat Utilization Technology Workshop. 38-45 (2001)

K.Tanaka：“AMTEC 循环钠再循环的灯芯设计方法和模拟”Proc。

K.Tanaka: "Experimental Evaluation of Electrode Conversion Efficiency of Alkali Metal Thermal to Electric Converter"Hear Transfer-Asian Research. 30・3. 234-244 (2001)

K.Tanaka：“碱金属热电转换器的电极转换效率的实验评估”Hear Transfer-Asian Research 30・3（2001）。

Kotaro Tanaka: "Experimental Evaluation of Electrode Conversion Efficiency of Alkali Metal Thermal to Electric Converter"Heat Transfer-Asian Research. 30・3. 234-244 (2001)

田中幸太郎：“碱金属热电转换器的电极转换效率的实验评估”《传热-亚洲研究》30・3（2001）。

田中耕太郎: "高周波インピーダンス法を利用したAMTECカソード側電極性能パラメータの特性評価"静岡理工科大学紀要. 11・1. 23-34 (2003)

田中幸太郎：“使用高频阻抗法的 AMTEC 阴极侧电极性能参数的特性评估”静冈科学技术研究所公告 11・1（2003 年）。