Fan-Shaped Flexible Radioisotope Thermoelectric Generators Based on BixTey and BixSb2-xTey Fabricated Through Electrochemical Deposition
Fan-Shaped Flexible Radioisotope Thermoelectric Generators Based on BixTey and BixSb2-xTey Fabricated Through Electrochemical Deposition
复制标题
基于电化学沉积制备的 BixTey 和 BixSb2-xTey 的扇形柔性放射性同位素热电发电机
DOI：
10.1002/ente.201800707
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发表时间：
2019
影响因子：
3.8
通讯作者：
Liu Kai
中科院分区：
文献类型：
--
作者：
Li Junqin;Tang Xiaobin;Liu Yunpeng;Yuan Zicheng;Xu Zhiheng;Liu Kai
本文采用电化学沉积法制备热电薄膜材料，实现小型化放射性同位素热电发电机（RTG）。首先，通过优化沉积电位和电解质浓度获得最佳成分和材料性能。该n型材料在0 V vs Ag/AgCl沉积电位下可达到最高热电功率因数812.34 μW m−1K−2，其成分为Bi1.92Te3.08。当电解质溶液中SbO+与Bi3+离子的浓度比设置为6且沉积电位相对于Ag/AgCl为-0.12 V时，p型材料的最高功率因数为137.18 μW m−1K−2。成分为Bi0.68Sb1.24Te3.08。然后，制作并测试了外形尺寸为11mm（高）× 33.8mm（直径）的原理扇形RTG（FRTG）。 FRTG 在 1.5W 热源下产生 170.21mV 的开路电压、247.55nW 的最大输出功率和 57.8K 的温差。与以往研究中机械切割制备的RTG相比，FRTG的体积减小了12.45倍，电压提高了60.71%。
This article employs electrochemical deposition to prepare thermoelectric film materials to achieve a miniaturized radioisotope thermoelectric generator (RTG). First, the optimal composition and material properties are obtained by optimizing the deposition potential and the concentration of the electrolyte. The n‐type material can reach the highest thermoelectric power factor of 812.34 μW m−1K−2at a deposition potential of 0 V vs Ag/AgCl, and its composition is Bi1.92Te3.08. The highest power factor of 137.18 μW m−1K−2of the p‐type material is obtained when the ratio of the concentration of SbO+to Bi3+ions in the electrolyte solution is set to 6 with the deposition potential of −0.12 V vs Ag/AgCl. The composition is Bi0.68Sb1.24Te3.08. Then, a principle fan‐shaped RTG (FRTG) with an overall size of 11 mm (height) × 33.8 mm (diameter) is manufactured and tested. The FRTG generates an open‐circuit voltage of 170.21 mV, a maximum output power of 247.55 nW, and a temperature difference of 57.8 K at 1.5 W heat source. Compared with the RTG prepared by mechanical cutting in previous research, the FRTG exhibits a volume that is reduced by 12.45 times and a voltage that is increased by 60.71%.