A Textile‐Based Temperature‐Tolerant Stretchable Supercapacitor for Wearable Electronics

Abstract

Among the extensive development of wearable electronics, which can be implanted onto bodies or embedded in clothes, textile-based devices have gained significant attention. For daily basis applications, wearable energy storage devices are required to be stable under harsh environmental conditions and different deformational conditions. In this study, a textile-based stretchable supercapacitor with high electrochemical performance, mechanical stability, and temperature tolerance over a wide temperature range is reported. It exhibits high areal capacitances of 28.0, 30.4, and 30.6 mF cm −2 at −30, 25, and 80 °C, respectively, while the capacitance remains stable over three repeated cycles of cooling and heating from −30 to 80 °C. The supercapacitor is stable under stretching up to 50% and 1000 repetitive cycles of stretching. A temperature sensor and an liquid-crystal display are simultaneously driven at temperatures between −20 and 80 °C by the supercapacitors. The supercapacitors are woven into a nylon glove power a micro-light-emitting diode stably regardless of the bending of the index finger. Furthermore, the encapsulated supercapacitors retain the capacitance during being immersed in water for a few days. This study demonstrates the potential application of the fabricated supercapacitor as a wearable energy storage device that works under extreme temperature variations, high humidity, and body movements.

Arrayed Heterostructures of MoS2 Nanosheets Anchored TiN Nanowires as Efficient Pseudocapacitive Anodes for Fiber-Shaped Ammonium-Ion Asymmetric Supercapacitors

“…The areal energy density dropped from 195.1 to 144.4 μWh cm –2 when the scan rate changed from 2 to 20 mA cm –2 , indicating that 74.1% was preserved. These outstanding results of FAASCs are visibly higher than the most previously reported, ,,− as the detailed compared information listed in Table S1. Conversely, the power density increased by 10 times and reached to 20.0 mW cm –2 , indicating that the fast transmission of the charge carriers and high reversibility.…”

A flexible solid-state supercapacitor with extreme low-temperature tolerance based on an ion conducting ice gel electrolyte

“…Hence, variety polymer gels blended with different types of antifreeze additives, such as high-concentration inorganic salts, eutectic organics, and ionic liquids, have emerged as solid-electrolytes for low-temperature applications, as the additives can restrain the freezing of water and depress ice formation aer being introduced in polymer gels. [10][11][12][13][14][15][16][17] However, the concentrated salt solution easily results in high viscosity and low ionic mobility, which effectively prevents the use of such polymer gel electrolytes. Eutectic organics and ionic liquids are generally inammable and unsafe when employed as antifreeze additives in solid-electrolytes.…”

Highly stable, stretchable, and versatile electrodes by coupling of NiCoS nanosheets with metallic networks for flexible electronics

“…Portable and wearable devices are attracting increasing attention with the rapid development of human-machine interfaces and artificial intelligence. [1][2][3][4][5] In this regard, designing and developing high-performance flexible electrodes, which are essential parts of electronic devices, is of great significance. [6][7][8][9] Various devices have different performance demands from the electrodes.…”