High-performance flexible transparent micro-supercapacitors from nanocomposite electrodes encapsulated with solution processed MoS₂ nanosheets

Abstract

High-performance flexible transparent micro-supercapacitors from nanocomposite electrodes encapsulated with solution processed MoS 2 nanosheets.Two-dimensional molybdenum disulfide (MoS 2 ) nanosheets have emerged as a promising material for transparent, flexible micro-supercapacitors, but their use in electrodes is hindered by their poor electrical conductivity and cycling stability because of restacking. In this paper, we report a novel electrode architecture to exploit electrochemical activity of MoS 2 nanosheets.Electrochemically exfoliated MoS 2 dispersion was spin coated on mesh-like silver networks encapsulated with a flexible conducting film exhibiting a pseudocapacitive behavior. MoS 2 nanosheets were electrochemically active over the whole electrode surface and the conductive layer provided a pathway to transport electrons between the MoS 2 and the electrolyte. As the result, the composite electrode achieved a large areal capacitance (89.44 mF cm -2 at 6 mA cm -2 ) and high energy and power densities (12.42 µWh cm -2 and P = 6043 µW cm -2 at 6 mA cm -2 ) in a symmetric cell configuration with 3M KOH solution while exhibiting a high optical transmittance of ~80%. Because the system was stable against mechanical bending and charge/discharge cycles, a flexible micro-supercapacitor that can power electronics at different bending states was realized.

Fabrication Technologies of Flexible Transparent Electrodes for Supercapacitors: Recent Advances and Perspectives

“…The power density and rate performance of MSCs can be increased. [201] High-definition visualization of electronic devices is an urgent problem to achieve high transparency of MSC. MSC provides a solution for the energy supply of integrated equipment.…”

Recent Advances in Molybdenum Disulfide and Its Nanocomposites for Energy Applications: Challenges and Development

“…Consequently, the composite electrode showed a significant areal capacity of 89.44 mF cm −2 at a current density of 6 mA cm −2 . The electrode has an impressive energy density of 12.42 µWh cm −2 and power density of 6043 µW cm −2 at a current density of 6 mA cm −2 while used in a symmetric supercapacitor cell layout [ 209 ]. The future scope of MoS 2 and its composites for flexible supercapacitors holds great potential in enhancing the performance, stability, and integration of energy storage devices.…”

Recent Progress in Electric‐field Enhanced 3D Graphene Electrodes using Laser Scribing for In‐plane Microsupercapacitors

“…The development of mSC using laser‐scribing method began in 2011, leading to the development of various technologies and materials, and various mSCs began to be developed, as summarized in the timeline of Figure 1. To design high‐performance mSCs, the advanced strategies, such as utilization of electrode materials with pseudo‐capacitive behavior, [46–48] doping of hetero‐atoms, [24,26,49] and use of electrochemically redox‐active electrolyte, [50–52] have begun to be developed. In particular, most recently, morphologically engineered electrodes as the first proof‐of‐concept of interdigitated electrodes for mSCs have been presented and studied via a few research reports [26,53–60] .…”