Metal-Organic Framework (MOF)-based Smart E-textile Supercapacitors

Wearable electronic textiles, also known as e-textiles, have surfaced as a promising means of seamless and unobstructed incorporation of electronic health monitoring gadgets into our daily routines. Yet, creating high-performance and flexible energy storage solutions still presents a notable hurdle in advancing these technologies. Nevertheless, creating efficient, adaptable, and expandable energy storage solutions continues to pose a noteworthy obstacle in powering these devices. This study demonstrates a facile strategy to design and fabricate MOF-based smart wearable e-textiles for all-solid-state textile supercapacitors. We report the fabrication of highly flexible and washable e-textiles by exploiting screen printing, pad-dry coating and inkjet print technology utilising a standalone MOF. The fabricated e-textiles were used as electrodes for an all-solid-state textile supercapacitor. The high areal capacitance of ~221.51 mF cm-2, ~359.4 mF cm-2 and ~353.5 mF cm-2 were achieved at a scan rate of 1 mVs-1 for screen print, pad-dry coating and inkjet printing technology respectively. With high energy densities of ~123.06 µWh cm−2 (screen print), ~199.66 µWh cm−2 (coating) and ~196.39 µWh cm−2 (inkjet print) and very high-power densities ~55 377.5 µW cm−2 (screen print) ~55 291.54 µW cm−2 (coating) ~54 385.38 µW cm−2 (inkjet print), the supercapacitors also showed outstanding capacitance retention (⁓97.4-97.9%) after 1 000 cycles. Our findings successfully demonstrate the potential of MOF-based smart textiles for wearable electronics applications, especially opening a new pathway for high-performance textile-based energy storage solutions.