Electrochemical Double-Layer Capacitance of MoS[sub 2] Nanowall Films
By Jia Mei Soon, K. Loh. 2007
431 citations recorded by the source corpus.
Edge-oriented MoS 2 films synthesized by single source precursor chemical vapor deposition exhibit a high density of nanowalls, which can potentially exhibit excellent electrochemical charge storage properties. The electrochemical double-layer capacitance of layered, nanowalled MoS 2 film has been investigated in this work using electrochemical impedance spectroscopy. We show that edge-oriented MoS 2 thin films can behave as a supercapacitor at alternating current frequencies up to 100 Hz. The supercapacitor performance is comparable to that of carbon nanotube array electrodes. In addition to double-layer capacitance, diffusion of the ions into the films at slow scan rates gives rise to faradaic capacitance, which enhances the capacitance significantly. The real and imaginary part of the capacitance of the MoS 2 films was analyzed as a function of frequency, in order to obtain information on the relaxation time constant and frequency dependence of the supercapacitor properties.
Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials, Polymers and Plastics
View Paper: https://www.semanticscholar.org/paper/ddab9796a60e086e069552145586f2aad20f5471
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In Biomedical Engineering
In Electronic, Optical and Magnetic Materials
In Polymers and Plastics
Citations in the corpus
- Two-dimensional transition metal dichalcogenides in supercapacitors and secondary batteries (2019, background): “Investigations have suggested that 1H/2H TMDs such as thin MoS2 sheets have comparable supercapacitor performance to that of carbon nanotube arrays and a theoretical capacity (~1000 F g -1 ) greater than that of graphite [72, 73].”