Zuhair Elseddig

11 Questions 16 Answers 0 Followers

Questions related from Zuhair Elseddig

How to calculate charge storage in battery-supercapacitor hybrid device?

I’m working with battery-supercapacitor hybrid device, I know that to obtain better performance charge storage in positive electrode must equal to that stored in negative electrode (Q+ = Q−), my...

12 December 2017 4,832 5 View

How to explain the presence of three peaks in my LaMnO3 supercapacitor electrode?

Dear all,I’m working with LaMnO3 as supercapacitor electrode.I prepared my LaMnO3 by sol gel method, however when I tested the electrochemical properties for my LaMnO3 electrode (pasted in nickel...

12 December 2016 1,695 6 View

Why Precursors of perovskite (such as LaMnO3 after obtaining metal hydroxide) should be calcined in oxygen atmosphere at high temperature?

Dear all I'm working with graphene \LaMnO3 nanocomposite . my question is : Is it easy to do calcination in vacuum oven (tube furnace), in order to avoid inducing defects in the graphene layers (...

10 October 2016 6,313 2 View

Is it bosible to make acomposite materials of graphene oxide and LaMnO3 nanocoparticls ?

I am working with graphene oxide nanocomposite materials , and I planed to use LaMnO3 as nanocompoite (GO/LMO) . my question is.. is it bosible to make graphene oxide / LMO nanocomposite materials,

09 September 2016 6,526 1 View

Why is capacitace of solid state supercapacitor getting low even when I generate pores in graphene electrode?

Hello everyone, I tried to improve the capacitance of my solid state supercapacitor (Reduce Graphene paper obtained by vacuum filtration was used as electrode materials) by generating pores in...

02 February 2016 7,257 8 View

How do I explain the differences of XRD Peak position, intensities and peak broaden for the graphite and graphene oxide materials?

To be more clear. Three samples was characterize by XRD spectroscope (the sample is Graphite powder, Graphene oxide powder and Graphene oxide paper). The results indicate that the peak intensity...

11 November 2015 474 9 View

Can someone give me more clarification about different between nanoparticle and nanocomposite?

Can someone give me more clarification about different between nanoparticle and nanocomposite.Also I want to know the role for obtaining Graphene nanocomposite as space (spacer to prevent...

08 August 2015 3,149 2 View

Are there any new ideas to get graphene from graphite by fast and fully scalable methods?

Hi there Is there any one tell me that how to get graphene from graphite by fast and fully scalable methods, because as I know the old methods are very costly and also time consumable. I want to...

06 June 2015 4,519 6 View

How can I find controllable parameters that may be affecting the performance of a graphene nanocomposite supercapacitor?

I'm working in the field of graphene Nano composite as electrode materials for supercapacitor, but until now I didn't obtained sufficient power density by this electrode (graphene nanocomposite),...

12 December 2014 8,607 5 View

Can anyone tell me how to synthesize large-scale bulk nanocrystalline materials, having superior properties and at a reasonable cost?

Recently, large attention was devoted to the research and development of nanostructured materials. However, there are still many difficulties in synthesizing large-scale bulk nanocrystalline...

09 September 2013 8,464 1 View

How to Fit EIS data for pseudocapacitance electrode?

Hello every body. Could anyone help me to fit EIS data (attached file) and also help me to calculate the fitted parameters? Electrode show battery like characteristic behavior as seen from CV and...

01 January 1970 7,390 0 View