Direct Laser‐Patterned Micro‐Supercapacitors from Paintable MoS₂ Films

Abstract

Micrometer-sized electrochemical capacitors have recently attracted attention due to their possible applications in micro-electronic devices. Here, a new approach to large-scale fabrication of high-capacitance, two-dimensional MoS2 film-based micro-supercapacitors is demonstrated via simple and low-cost spray painting of MoS2 nanosheets on Si/SiO2 chip and subsequent laser patterning. The obtained micro-supercapacitors are well defined by ten interdigitated electrodes (five electrodes per polarity) with 4.5 mm length, 820 μm wide for each electrode, 200 μm spacing between two electrodes and the thickness of electrode is ∼0.45 μm. The optimum MoS2 -based micro-supercapacitor exhibits excellent electrochemical performance for energy storage with aqueous electrolytes, with a high area capacitance of 8 mF cm(-2) (volumetric capacitance of 178 F cm(-3) ) and excellent cyclic performance, superior to reported graphene-based micro-supercapacitors. This strategy could provide a good opportunity to develop various micro-/nanosized energy storage devices to satisfy the requirements of portable, flexible, and transparent micro-electronic devices.

Two-dimensional layered MoS2: rational design, properties and electrochemical applications

“…Therefore, optimization of architectures would enable MoS 2 with enhanced surface area and more activated edges for ion intercalation, thereby superior performance of supercapacitors can be obtained. Another example worth noting is the work by Yang et al, 131 who reported a 2D MoS 2 -based micro-supercapacitor. This MoS 2 micro-supercapacitor was fabricated through laser patterning of a spray-coated MoS 2 film and consisted of finger-like electrodes built from curly MoS 2 nanosheets.…”

Inkjet Printing of MoS2

“…[10,11] However, as for the emerging macro-electronics [12,13] which features cost efficiency, simple methods to fabricate solution-phase MoS2 nanosheets are favorable in a variety of applications, such as sensors, [14] photodetectors, [15,16] and supercapacitors. [17] Furthermore, patterning, [18] especially direct patterning, [17] of MoS2 at micrometer dimensions has great significance in extending their applications. As a powerful direct writing technique, [19] inkjet printing has received increasing interest in electronics.…”

Strain and structure heterogeneity in MoS2 atomic layers grown by chemical vapour deposition

“…H igh-quality and single-layered molybdenum disulfide (MoS 2 ) has been synthesized by chemical vapour deposition (CVD) over the past 2 years [1][2][3][4][5][6][7][8][9] , boosting its promise in applications involving hydrogen evolution reaction 10 , supercapacitors 11 , ultra-low power consumption field-effect transistors and phototransistor 12,13 , spintronic devices 14 , nonlinear optics 15 and biosensors 16 . CVD-grown MoS 2 atomic layers are also superior to samples prepared by mechanical exfoliation and chemical isolation methods, as continuous monolayer MoS 2 (hereafter 1H-MoS 2 ) can currently be grown at the centimetre-length scale 3,11,17,18 .…”

“…CVD-grown MoS 2 atomic layers are also superior to samples prepared by mechanical exfoliation and chemical isolation methods, as continuous monolayer MoS 2 (hereafter 1H-MoS 2 ) can currently be grown at the centimetre-length scale 3,11,17,18 . However, concurrently with the large-scale growth of monolayer MoS 2 , variations in crystal geometries and atomic structures have been predicted and observed 19 .…”