Specific capacitance from galvanostatic charge discharge curves | Energy density and power density

[@Samouraimoh]

Excellent tutorial. Keep the good work.

[@MyMouseish]

Hello, You should also add that this equation (2:35) you are showing is only applicable for EDLC behaviour. As from the previous equation (C=Q/V) it is only linearly dependent. Therefore the GCD graph you are drawing at 3:03 is quite confusing because you should not apply this equation to this type of charge/discharge behaviour. I recommend reading the articles: "Energy Storage Data Reportingin Perspective-Guidelines for Interpreting the Performance of Electrochemical Energy Storage Systems" (Mathis, Gogotsi) and "Towards establishing standard performance metrics for batteries, supercapacitors and beyond" (Noori, Mousavi)

[@PHYSICSINSIGHT]

Thanks for adding this

[@khushdil666]

Greetings!!! Sir I need You help regarding GCD analysis using CorrTest software.

[@khushdil666]

I need to know how parameters are being set when going for GCD analysis

[@muhammadahsaniqbal2161]

thank you so much

[@dhanalakshmibrammasuri1511]

Thanks for this video. It is very clear to understand do calculation ourselves

[@masoudhasany6284]

Very helpful. Thank you. It would be great if you can explain how to characterize a supercapacitor using CV and LSV data in a video. Thanks

[@nayadabdallah9917]

Im looking for it. Have you found any video?

[@masoudhasany6284]

@@nayadabdallah9917 Not yet

[@SMS-yq8ks]

Thanks a lot. It is very useful

[@vtk2944]

Very nice explanation.

[@raziumsoomro2070]

Excellent video thank you for sharing..

[@zanazoro]

god bless you,thanks for sharing

[@BiplabKDeka]

Nice video. Plz show how to do the unit conversion I.e. F/g V2 to Wh/kg and F/g V2/h to W kg unit.

[@mohamedhussein8163]

I want to know how to use biologic vsp 300 glvantstat to test battery i on ant to know the prameter that i should enter to program

[@jiachengsun7362]

Hi, The video is great! However, The unit of Specific Capacitance is F/g and of energy density is W h/kg. Reference equation: F=( W * s ) / ( v^2 ) en.wikipedia.org/wiki/Farad Therefore, F/g = (W * s) / (g * v^2) The unit of energy density = ( F * v^2 ) / g = (W * s) / g And it is not equal to W h/kg so, 9:12 on video is wrong, it has to be divided by 3.6. Thank you Jiacheng

[@PHYSICSINSIGHT]

Yes... I had mention to take the conversion factor into consideration while changing the unit.

[@dr.shahidramay6728]

Sir if we have 5000 cycles of charge and discharge, can we have to find the capacitance of each discharge cycle one by one or anyother method if available please explain???

[@mudasirhussain4593]

Hello sir Need ur help regarding charging and discharging a supercapacitor by the Source meter

[@Manpreetkaur-ff1vd]

Hey... I want to know if we can use different anodic and cathodic currents while experimenting for GCD. If yes, then what value is to report... suppose, we apply 1mA at Anodic and 2 mA at cathodic, then for calculating Cp, which current we will use?? Please revert...

[@황혜원-t5t]

Thank you for the video. But, I I have a question about calculation of energy density. In this video, you calculate the energy density "0.5*Fg*V^2". But [F/g*V2] unit isn't equal to [Wh/kg]. plz tell me about it.

[@m.rizwansaleem8462]

Excellent

[@ashishpriyamgoswami5849]

very nice video thank you

[@s.dhinakaran1966]

How to draw Specific capacitance Vs cycle number graph?

[@amirmst2517]

Hi tnx for ur video if u make a video for EIS that how to calculate the parameters from it, it will be better..

[@shadiya6576]

Thanks for the video...Can you pls say what's the difference between specific capacitance and specific capacity?

[@PakistanTalkwithBilalSajid]

Thanks a lot. A very nice video.

[@ganeshaphysics]

Sir your not shown how to calculate the delta V potential difference, please inform how we will take the potential difference in discharging curve

[@umairshafiq9361]

Sir please share expressions for battery study (specific capacity )

[@chrisman5237]

why didn't you divide your energy density formula by 3.6 yet your unit is in Wh/kg? I will be pleased if you can tell why you did that... most literatures divide by 3.6 so what's different about yours? looking forward to hear from you. thanks and good work done.

[@9847356129]

calculate diffusive and capacitive contributions for electrode material can you do video on this

[@deepikamane535]

Hello sir I am performing this experiment but there is a difference between value of specific capacitance by using these two formulas what is the reason behind it this difference may 10 timesthe other

[@nailagulshan3102]

helpful🙏🙏

[@irausves]

Have you considered that energy density is possible for a two-electrode device?

[@PHYSICSINSIGHT]

May i know, why you are asking this thing?

[@irausves]

@@PHYSICSINSIGHT Because I didn't understand how I/m value comes from when two electrodes device are considered.

[@itsmeaddz7245]

Thanks a lot for this video. Also can you put the following as video if possible: EIS circuit fitting and calculating its parameters,Reitvield refinement,

[@Your_Research_Buddy]

I can help you with Rietveld refinement.

[@PAULTHOMASMEE]

Thanks, bro Really thankfull to the video, its really a great job i am having doubt about gcd calculation, i have done calculation as shown below is it correct? Regarding gcd application is the applied current is like depend on the weight of the sample if your sample is example 6 mg 0.1 A/g=0.0006 A 0.2 A/g=0.0012 A 0.3 A/g = 0.0018 A 0.4 A/g = 0.0025 A for example, you are applying a current of 0.0012 and discharging time of 1000 second and current potential as 0.2 A then is it cp=(applied current X discharge time)/(potential X mass) =(0.0012x1000)/(0.2 X 0.006)= 1000 So specific capacaitance -1000 F/g hoping to hear suggestions and feedbacks

[@PHYSICSINSIGHT]

Yes it is correct if you mean potential as 0.2 V only error of unit is there... Otherwise it is correct. Do you get this amount of discharging time or just taken it as an example? Because it is a large resulting in very large value of specific capacitance... Just curiousity

[@PAULTHOMASMEE]

@@PHYSICSINSIGHT Bro 0.2 as the potential window, for example, the first potential respective to first discharge second of gcd curve thats what i mean ok from your video example the dischage curve of 0 seconds starts from approx 0.5 in my case its 0.2 then is it correct bro

[@PHYSICSINSIGHT]

Yes it is correct i am just saying previously you have used amperes unit for potential "0.2A" it is "0.2V" . You calculation is correct

[@PAULTHOMASMEE]

@@PHYSICSINSIGHT even i was not sure with my calculations... bro please include orgin pro video regarding supercapacitor cv,gcd eis plotting tutorial also

[@PHYSICSINSIGHT]

This video also include origin part and for cv see my cyclic voltammetry part 2 video

[@almanaratan]

Hi there! there is one thing I need to confirm; The data you are using, is it from Chronopotentiometry or Galvanotactic Charge/Discharge Test???!

[@howeverpurple5078]

they both are same. gcd is commonly used name but in software its written as chronopotentiometry.

[@josephninghthoujam9349]

Dear sir, Why do we calculate specific capacitance from discharging curve?

[@howeverpurple5078]

bcz more discharge time means more capacitance. after how long a device discharges means there is more energy stored which is taking longer to dicharge.

[@p.asisters5446]

Thanks

[@mitali-445]

Nice 👍👏