Comparison of Two-Dimensional Transition Metal Dichalcogenides for Electrochemical Supercapacitors
By M. Bissett, S. Worrall, I. Kinloch, R. Dryfe. 2016
237 citations recorded by the source corpus.
Layered two-dimensional (2D) materials such as transition metal dichalcogenides (TMDCs) are receiving increased interest for applications in energy storage due to their high specific surface area and versatile electronic structure. In this work, we prepare solvent stabilised dispersions of a variety of few-layer thick TMDC crystals (MoS2, MoSe2, WS2, and TiS2) by ultrasonication. The exfoliated materials were first characterised by a variety of techniques to determine their quality. These dispersions were then used to form supercapacitor electrodes by filtration, without use of any further conductive additives or polymeric binders. These thin layer TMDC electrodes were assembled into symmetrical coin-cell devices for comparative electrochemical testing. It was found that despite being the most widely studied material, MoS2 suffers from inferior charge storage properties compared to the much higher conductivity and lower density TiS2. Impedance spectroscopy was used to investigate the charge storage mechanisms inside the coin cells, which were found to consist of a combination of both rapid, but low magnitude, electric double layer capacitance and much slower, but higher magnitude, ion adsorption pseudocapacitance.
Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/03b6cb38bfc8953d5759c477f44bcd2ddf61587c
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Electronic, Optical and Magnetic Materials
In Materials Chemistry
Citations in the corpus
- From two-dimensional materials to their heterostructures: An electrochemist's perspective (2017, methodology): “compared performance of MoS2, MoSe2, WS2, nd 1T-TiS2 in a supercapacitor coin-cell using cyclic voltammery and electrochemical impedance spectroscopy, pinpointing the emimetallic 1T-TiS2 as the most promising material due to the ighest capacitance and low mass density [97].”