Solid‐state cooling fibers comprising an electrocaloric polymer, poly(vinylidene fluoride‐trifluoroethylene‐chlorofluoroethylene) terpolymer, spray‐coated on a conductive fiber core electrode, and a coaxially coated single‐walled carbon nanotubes outer electrode are reported. The fiber coolers can be less than 160 µm thin and more than 8 cm long. Measured cooling ΔT of the EC fibers is 0.7 °C at an electric field of 100 V µm⁻¹ applied between the electrodes. The fiber coolers are flexible; 2000 cycles of repeated bending to a 2.5 mm curvature radius do not significantly degrade the cooling ΔT. Self‐actuated bending of the fibers is observed during the EC operation, which allows the EC fibers to move heat from one location to another without any additional driving mechanisms such as electromagnetic motors, pumps, or electrostatic actuation that are commonly used in conventional coolers. The self‐actuating EC fibers represent the first ever active cooler in a thin fiber form factor.

中文翻译：

---

自驱动电热冷却纤维

据报道，固态冷却纤维包括电热聚合物，聚偏二氟乙烯-三氟乙烯-氯氟乙烯三元共聚物，喷涂在导电纤维芯电极上以及同轴涂覆的单壁碳纳米管外电极。光纤冷却器的厚度可以小于160 µm，长度可以大于8 cm。在电极之间施加的100 V µm ^-1电场下，EC纤维的测得冷却ΔT为0.7°C 。纤维冷却器是柔性的。重复弯曲至2.5 mm曲率半径的2000个循环不会显着降低冷却ΔT。在EC操作过程中观察到了纤维的自驱动弯曲，这使EC纤维可以将热量从一个位置转移到另一位置，而无需任何其他驱动机制，例如常规冷却器中常用的电磁马达，泵或静电致动。自驱动EC纤维是有史以来第一个以纤维形式出现的主动冷却器。