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Updated: Jun 25, 2026

Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation
Published on: February 5, 2020
All-Weather Adaptable Non-Woven Janus Graphene Fibers with Asymmetric Wettability, Reliable Flame Retardancy and
Yongkang Han1,2, Tiehu Li1,2, Yanan Liu1,2
1School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, P. R. China.
Abstract:
Against the backdrop of drastic global climatic change, personal thermal management (PTM) textiles have emerged as a critical safeguard for human comfort and safety. However, the inherent trade-off between moisture management and active heating functionality significantly impedes their widespread application. Herein, a flexible Janus graphene fiber fabric (J-GFF) was fabricated via wet spinning, selective filtration, Ca2+-induced fiber fusion, and floating polymer modification strategies. By tailoring the interfacial fusion degree and surface treatment, J-GFF exhibited an excellent water vapor transmission (WVT) rate of 233.5 g m-2 h-1 and superior evaporative cooling performance, benefiting from the formed hierarchical structures and adjusted wetting behavior. Thus, when the J-GFF was used as artificial wearable textiles, the temperature of the human skin surface decreased by 4.5°C under normal conditions, and even up to 14°C under heavy perspiration. Moreover, the produced fabric demonstrated extraordinary heating efficiency and flame retardancy, where fabrics could be heated to 175°C at a high heating rate of 690°C s-1 to withstand ∼500°C firing for over 15 s. Thus, this work offers a novel avenue for developing next-generation all-weather and multifunctional PTM textiles with evaporative cooling, breathability, mechanical durability, and Joule heating and safety.
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