High-performance flexible transparent micro-supercapacitors from nanocomposite electrodes encapsulated with solution processed MoS2 nanosheets
| Autor: | Han-Ki Kim, Kandasamy Prabakar, Jihyun Kim, Vivekanandan Raman, Joohoon Kang, Aravindha Raja Selvaraj, Dongjoon Rhee |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Electrolyte Electrochemistry Pseudocapacitance Energy Materials chemistry.chemical_compound General Materials Science molybdenum disulfide 105 Low-Dimension (1D/2D) materials Materials of engineering and construction. Mechanics of materials Molybdenum disulfide Micro-supercapacitor 103 Composites Supercapacitor Nanocomposite nanocomposite business.industry 50 Energy Materials 201 Electronics / Semiconductor / TCOs 207 Fuel cells / Batteries / Super capacitors chemistry Electrode TA401-492 flexible transparent electrode Optoelectronics business Layer (electronics) TP248.13-248.65 Biotechnology Research Article pseudocapacitance |
| Zdroj: | Science and Technology of Advanced Materials article-version (VoR) Version of Record Science and Technology of Advanced Materials, Vol 22, Iss 1, Pp 875-884 (2021) |
| ISSN: | 1878-5514 1468-6996 |
| Popis: | Two-dimensional molybdenum disulfide (MoS2) 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 MoS2 nanosheets. Electrochemically exfoliated MoS2 dispersion was spin coated on mesh-like silver networks encapsulated with a flexible conducting film exhibiting a pseudocapacitive behavior. MoS2 nanosheets were electrochemically active over the whole electrode surface and the conductive layer provided a pathway to transport electrons between the MoS2 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 3 M 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. Graphical abstract |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|