An easily manipulated protocol for patterning of MXenes on paper for planar micro-supercapacitors. Issue 37 (31st July 2017)

• Record Type: Journal Article
• Authors: Hu, Haibo; Hua, Tao
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 37(2017)
• Page Start: 19639
• Page End: 19648
• Publication Date: 2017-07-31
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta04735e
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : An easily manipulated protocol for patterning of MXenes on commercial printing paper for planar micro-supercapacitors is reported, with which the fabricated devices can acquire a maximal areal capacitance of 27.29 mF cm −2, achieving at least 460% enhancement compared to the value of advanced carbon-based planar MSCs (0.1–6 mF cm −2 ). Abstract : Recently, a unique class of bidimensional layered transition-metal carbides/nitrides, namely MXenes, has shown great potential for use in high-performance on-chip microsupercapacitors (MSCs). Patterning of MXenes on film substrates to form coplanar interdigital electrodes is the key to realize the fabrication of high-performance MXene-based planar MSCs. Herein, through a combination of ordinary laser printing, vacuum-assisted deposition and physical sputtering, a simple protocol for fast and on-demand patterning of few-layered MXene flakes on paper into a coplanar arrangement to fabricate planar symmetric MSCs is reported. Benefiting from the as-obtained binder/conductive-additive free MXene-based interdigital electrodes with a unique layered porous structure and high electrical conductivity attributed to the good alignment along the c -axis of the closely restacked few-layered MXene flakes, the as-fabricated all-solid-state planar MXene-based symmetric MSCs can acquire a maximal areal capacitance of 27.29 mF cm −2 as the thickness of the MXene electroactive layer increases, achieving at least 460% enhancement compared to the value of advanced carbon-based planar symmetric MSCs (0.1–6 mF cm −2 ), without obvious deterioration of the volumetric capacitance. Our work provides a simple and convenient platform to fabricate MXene-based on-chip symmetric MSCs with thick coplanar interdigital electrodes to increase the capacity per device within a limited footprint.