Energilagringsströmförsörjning Mos-röranpassning

The rGO/MoS 2-S shows enhanced gravimetric capacitance values (318 ± 14 Fg −1) with higher specific energy/power outputs (44.1 ± 2.1 Whkg −1 and 159.16 ± 7.0 Wkg −1) …

How to improve electrocatalytic performance of Mos 2?

The improvement of the electrical conductivity and exposure of more active sites plays an important role to improve the electrocatalytic performance of MoS 2. However, the low intrinsic conductivity and restacking of the layered interfaces limit the performance of MoS 2 for energy conversion and storage applications 30.

Why does Mos 2 have a better capacitance over repeated electrochemical cycles?

The layered-like structure of MoS 2 gets easily deformed over repeated electrochemical cycles due to the repeated insertion/exertion of electrolytic ions between the layers of MoS 2. As an example, the flower-like MoS 2 nanostructure exhibited better capacitance of 255 F g −1.

Why do we cover Mos 2 with a corresponding oxide phase?

The oxide layer over MoS 2 provides a surface protection and helps in reducing the shuttling of the polysulfides which is caused by the accumulation of S over Li-electrodes. Thus, covering of MoS 2 with the corresponding oxide phase accounts for the enhanced structural stability over repeated charging/discharging.

What is the synergistic effect of Mos 2 and RGO?

The synergistic effect of MoS 2 and rGO enhances intercalation and transfer process of ions and prevents layered stacking with exposure of additional active edges that are responsible for better energy storage and HER performance.

How to increase her activity of Mos 2?

Therefore, different strategies have been employed to increase the HER activity of MoS 2 by increasing the active sites, the electrical contact of the sites 26, 27, and exfoliation of layers to increase the surface area 28. Also, the effort has been made to increase the activity of basal plane of MoS 2 29.

How does doping a MOS 2 increase the specific capacity/capacitance?

Reprinted with permission from Ref. Copyright 2019 Elsevier. Doping MoS 2 with suitable dopants either at the Mo-site or S-site, results in an increased charge carrier concentration which improves the electronic conductivity of MoS 2 and hence increases its specific capacity/capacitance compared to undoped MoS 2.