Thermoelectric (TE) technology enables the direct conversion between heat and electricity, thereby contributing to the alleviation of the prevailing energy crisis and the mitigation of environmental concerns. Bismuth telluride-based TE materials have been commercially utilized, while they are mainly applied to solid-state cooling rather than energy harvesting. Superionic conductors including copper chalcogenides and silver chalcogenides are rendered as promising TE candidates for power generation due to their superior thermoelectric figure of merit (ZT) at middle or high temperatures; the liquid-like behavior of ions aligns these systems with the concept of phonon-liquid electron-crystal (PLEC). Although the mobile ions are beneficial to enhancing the electrical transport and phonon scattering, their directional migration driven by an electric field or temperature gradient can result in the unintended deposition of metals, which can impair both the TE properties and the service stability of the materials. Therefore, it is imperative to identify stabilized liquid-like TE materials that can withstand current strike and high temperature.

中文翻译：

---

超离子硒化铜基热电材料的稳定化


热电 （TE） 技术可实现热能和电能之间的直接转换，从而有助于缓解普遍存在的能源危机和缓解环境问题。基于碲化铋的 TE 材料已得到商业应用，而它们主要应用于固态冷却而不是能量收集。包括铜硫属化物和银硫属化物在内的超离子导体因其在中高温下优异的热电品质因数 （ZT） 而成为有前途的 TE 发电候选者;离子的液体状行为使这些系统与声子-液电子晶体 （PLEC） 的概念保持一致。尽管移动离子有利于增强电传输和声子散射，但它们由电场或温度梯度驱动的定向迁移会导致金属的意外沉积，从而损害材料的 TE 性能和使用稳定性。因此，必须确定能够承受电流冲击和高温的稳定液态 TE 材料。