Fig. 4: Potential application demonstration and comprehensive comparison of the FTGA.
From: Ultrastrong, flexible thermogalvanic armor with a Carnot-relative efficiency over 8%
a Schematic illustration of the FTGA served as an armor for safeguarding and a flexible thermoelectric generator to power a smartwatch through harvesting thermal energy from human skin. b Photograph of the FTGA module fixed on a human arm for harvesting heat energy from human body. c The output voltage-time curve from harvesting human body heat, the temperature difference (ΔT) of the hot and cold side of the electronics was about 5 °C. d The FTGA module could power various electronic devices with the assistance of a passive voltage booster, including an LED array (d1) and a smartwatch (d2). e Comprehensive comparison of the Carnot-relative efficiency (ηr) versus stretchability for various thermogalvanic cells.
