Abstract
As an ideal substrate for active material integration, fabrics of nanofiber bundles have held great promise due to their outstanding surface area, unique mechanical flexibility, and textile structure. Herein, a polyethylene nanofiber bundle (PNB) fabric was prepared via melt blending extrusion followed by chemical deposition of a copper sulfide (CuS) active layer. Benefiting from the high conductivity and the outstanding light absorption characteristics of CuS, CuS/PNB fabrics exhibited excellent photo and electric dual-driven energy conversion performance. Specifically, the CuS/PNB fabrics showed the highest electrical conductivity (277 S m–1), exceptional Joule heating (up to 85.7 °C at a voltage of 0.8 V), a low working voltage (0.2–0.8 V), and long-term stability. Furthermore, the photo-absorption efficiency and surface temperature reached 94.3% and 91.2 °C under the irradiation of 1 sun, respectively. Meanwhile, the CuS/PNB fabrics exhibited a high specific evaporation rate of up to 1.81 kg m–2 h–1, as well as an energy conversion efficiency of 95.1% under one solar irradiation. We believe that such a functional fabric offers a strategy for energy harvesting and conversion fields and displays promising applications in warmth-keeping and solar-driven water evaporation in the future.
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