Pranjala Tiwari

9 Questions 8 Answers 0 Followers

Questions related from Pranjala Tiwari

What is the effect of charge discharge current density on the coulombic efficiency of a electric double layer electrochemical capacitor??

The coulombic efficiency of my supercapacitor device is increasing with the increase in the applied current density of charging-dicharging. Can someone please enlighten me on this trend because...

01 January 2020 3,940 4 View

Can we calculate the thickness of a thin film (1-10 nm) using XPS depth profile analysis?

I have performed XPS analysis of a multilayered thin film. However, the analysis gives a relation between the sputter time and intensity of various elements. Is there any relation or approximation...

04 April 2019 3,272 15 View

Which current and voltage values are to be taken in account for calculating percentage of capacitive and diffusion current from CV data?

I did the CV analysis of my sample (CNT-MoS2 hybrid) at small scan rates (0.1-1 mV/sec). However, my results show no peaks even at the lowest scan rates, and in order to utilize the Dunn's...

12 December 2018 4,828 3 View

How does the surface energy and roughness of thin films effect it's electrochemical performance?

I am working on MnS thin film based electrodes. I observed that the specific capacitance of my material decreased with increasing roughness of films. What could the possible reasons behind it?

06 June 2018 8,809 1 View

What factors decide the capacitance retention (cyclic life) of supercapacitors?

I have used ITO and metallic foam as current collector to prepare my electrodes (metal sulphide as active material). The specific capacitance is higher for metallic foam due to obvious reasons....

12 December 2017 6,440 4 View

How can i increase adhesion of WS2 thin films deposited by DC magnetron sputtering?

I am depositing WS2 thin films using magnetron sputtering to be used as electrode material for supercapacitive application. I have tried various substrates( Stainless steel, ITO) but failed to...

11 November 2017 941 3 View

Can anyone help me in interpretation of my XPS data of WS2 thin films?

Lately i have been trying to understand my XPS data for WS2 thin films. The elemental scan i obtained for sulphur was in agreement with the previously reported literature. However, the scan for...

11 November 2017 3,166 4 View

Where exactly does the photon absorption takes place (p-layer, n-layer or the junction) in a solar cell and why?

I have read alot of data however its still confusing for me.

03 March 2017 2,352 9 View

Considering thin film based supercapacitors, what would be the effect of thin film's thickness on the supercapacitor's electrochemical performance?

I want to decide the optimizing range for the synthesis of my thin films (transition metal oxides and transition metal sulphides) to be used as electrode material in supercapacitors so as to get...

01 January 1970 9,349 0 View