Urgent demand for a sustainable power supply for wearables promotes great efforts on the development of flexible thermoelectric devices. The elastic bendability allows the reservation of initial power and flexibility in inorganic thermoelectric films. The elasticity is related to the thickness engineeringly and the elastic strain scientifically, therefore guiding this work to focus on developing elastic thermoelectric generators using high-performing orthorhombic Ag₂Se_1–xS_x films that thinned the bulks through multipass hot-rolling at ∼393 K. Such a plastic deformation enables a creation of dense dislocations and a refinement of grain and, thereby, a dramatic increase in the elastic strain, impressively securing a full recoverability in transport properties for the obtained films even after 100,000 times bending within a radius down to ∼3 mm. The resultant achievement of extraordinary specific power density of ∼5 μW/cm-K² in a six-leg flexible device robustly demonstrates these alloys as a potentially sustainable power source for wearable electronics.

中文翻译：

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通过塑料加工增强高性能 Ag2Se 基热电材料的可恢复弯曲性


对可穿戴设备可持续电源的迫切需求推动了柔性热电器件的开发。弹性弯曲性允许在无机热电薄膜中保留初始功率和柔韧性。弹性在工程上与厚度有关，在科学上与弹性应变有关，因此指导这项工作专注于开发使用高性能正交 Ag₂Se _1-xS_x 薄膜的弹性热电发电机，该薄膜通过在 ∼393 K 下通过多道热轧减薄块体。这种塑性变形能够产生致密的位错和晶粒的细化，从而显着增加弹性应变，即使在半径低至 ∼3 mm 的半径内弯曲 100,000 次后，所获得的薄膜也能完全恢复传输性能。因此，在六脚柔性器件中实现了 ∼5 μW/cm-K² 的非凡比功率密度，有力地证明了这些合金是可穿戴电子产品的潜在可持续电源。