title: Waterproof, Ultrahigh Areal-Capacitance, Wearable Supercapacitor Fabrics.
abstract: High-performance supercapacitors (SCs) are promising energy storage devices to meet the pressing demand for future wearable applications. Because the surface area of a human body is limited to 2 m2, the key challenge in this field is how to realize a high areal capacitance for SCs, while achieving rapid charging, good capacitive retention, flexibility, and waterproofing. To address this challenge, low-cost materials are used including multiwall carbon nanotube (MWCNT), reduced graphene oxide (RGO), and metallic textiles to fabricate composite fabric electrodes, in which MWCNT and RGO are alternatively vacuum-filtrated directly onto Ni-coated cotton fabrics. The composite fabric electrodes display typical electrical double layer capacitor behavior, and reach an ultrahigh areal capacitance up to 6.2 F cm-2at a high areal current density of 20 mA cm-2. All-solid-state fabric-type SC devices made with the composite fabric electrodes and water-repellent treatment can reach record-breaking performance of 2.7 F cm-2at 20 mA cm-2at the first charge-discharge cycle, 3.2 F cm-2after 10 000 charge-discharge cycles, zero capacitive decay after 10 000 bending tests, and 10 h continuous underwater operation. The SC devices are easy to assemble into tandem structures and integrate into garments by simple sewing.
authors.affiliation: Laboratory for Advanced Interfacial Materials and Devices, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong, S. A. R., China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Laboratory for Advanced Interfacial Materials and Devices, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong, S. A. R., China.
authors.forename: Qiyao
authors.initials: Q
authors.lastname: Huang
authors.affiliation: Laboratory for Advanced Interfacial Materials and Devices, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong, S. A. R., China.
authors.forename: Liyong
authors.initials: L
authors.lastname: Niu
authors.affiliation: Laboratory for Advanced Interfacial Materials and Devices, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong, S. A. R., China.
authors.forename: Dongrui
authors.initials: D
authors.lastname: Wang
authors.affiliation: Laboratory for Advanced Interfacial Materials and Devices, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong, S. A. R., China.
authors.forename: Casey
authors.initials: C
authors.lastname: Yan
authors.affiliation: Laboratory for Advanced Interfacial Materials and Devices, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong, S. A. R., China.
authors.forename: Yiyi
authors.initials: Y
authors.lastname: She
authors.affiliation: Laboratory for Advanced Interfacial Materials and Devices, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong, S. A. R., China.
authors.forename: Zijian
authors.initials: Z
authors.lastname: Zheng
keywords: electronic textiles; energy storage; polymer-assisted metal deposition; supercapacitor; wearable electronics