Integrated Biomonitoring Sensing with Wearable Asymmetric Supercapacitors Based on Ti3C2 MXene and 1T‐Phase WS2 Nanosheets

• Published in: Advanced functional materials Vol. 30; no. 39
• Main Authors: Vaghasiya, Jayraj V., Mayorga‐Martinez, Carmen C., Vyskočil, Jan, Sofer, Zdeněk, Pumera, Martin
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc 01.09.2020
• Subjects: 2D materials; Asymmetry; Biomonitoring; Cloth; Configuration management; Electrodes; Energy storage; Flexible components; flexible supercapacitors; health monitoring systems; Integrated circuits; Materials science; MXenes; Nanosheets; Portable equipment; Storage systems; Structural integrity; Substrates; Supercapacitors; textile power sources; Textiles; Two dimensional materials; wearable bioelectronics; Wearable technology
• DOI: 10.1002/adfm.202003673
• ISSN: 1616-301X

Research on wearable sensing technologies has been gaining considerable attention in the development of portable bio‐monitoring devices for personal health. However, traditional energy storage systems with defined size and shape have inherent limitations in satisfying the performance requirements for flexible electronics. To overcome this constraint, three different configurations of flexible asymmetric supercapacitor (FASC) are fabricated on polyester/cellulose blend (PCB) cloth substrate using Ti3C2 nanosheet (NS) and 1T WS2 NS as electrodes, and aqueous pluronic gel as an electrolyte. Benefiting from the 2D material electrodes, the interdigitated FASC configuration exhibits excellent performance, flexibility, cyclic stability, wearability and can be configured into multiple units and shapes, which far exceed that exhibited by the textile‐based FASC. Furthermore, the arbitrary (“AFN”) and sandwich (“FLOWER”) configurations Ti3C2 NS/1T WS2 NS FASC can be assembled directly on a PCB cloth substrate, thereby offering good structural integrity coupled with ease of assembly into integrated circuits of different shapes. More specifically, a lightweight, flexible, and wearable bio‐monitoring system is developed by integrating force sensing device with interdigitated FASC, which can be used to monitor the physical status of human body during various activities. A potential application of this system in healthcare is successfully demonstrated and discussed. An integrated bio‐monitoring system with a Ti3C2 NS/1T WS2 NS based flexible supercapacitor and force sensor device is developed. The proof of concept for practical application of this system is demonstrated by monitoring live artery pulse and feet alignment analysis on a human subject.