Tutorial 25-Breakdown CV Analyzer Code (Exercise Included)

[@EChem_Channel]

Sorry for the super long video. Hope it is useful for some of our viewers. If you have questions, please post them in the comment section. Thank you!

[@ndoukeutchatatblondel688]

Your programme is very useful because it saves a lot of time. I wished it was compatible with other potentiostat format and run as a tier programme rather than in matlab. Thank you for the hard work.

[@EChem_Channel]

Thank you. I wish I will have time one day to get data from other manufacturers and make a standalone program.

[@zahirabbas5390]

Can you please teach us how to calculate capacitive and diffusive contribution by using data....... Looking for your kind response and video on this urgently.

[@EChem_Channel]

Hi there, there are already some videos on KZbin covering that particular analysis. Sorry for getting to it so late.

[@thaysericardo5519]

very good. I would like to see the practical experiment you guys do and how you prepare the working electrode. Thanks

[@EChem_Channel]

We made free-standing film and punched working electrodes into small circular disks. Some information is included here: kzbin.info/www/bejne/lZnZiKhtnL5kmc0&ab_channel=EChemChannel

[@arvindgaurav1493]

Instead of mpt format can we use any other format like excel or notepad?

[@EChem_Channel]

You can. You will need to adjust the input part of the code.

[@payam1597]

@EChem Channel: Thank you very much. It is impressive. This code functions on the basis that CV data (I-V) is converted to I-t data and then analyses are performed. When I directly use the surface area of the CV curve (area in A.V) for analysis of CV data (Csp = CV curve area / (2 . mass . voltage window . sweep rate)), I get results that are slightly different from those calculated using this Matlab code, particularly at lower sweep rates. I tried averaging anodic and cathodic capacitance values calculated by this code, but they are still different. I am getting the CV data from a 3 electrode system with pseudocapacitive materials against graphite rod counter electrode and Ag/AgCl reference electrode. I would be appreciated if you can explain the source of the deviation observed here. Thank you in advance.

[@EChem_Channel]

Hello @Payam, thanks for your question! In my experience, most differences come in two ways 1. Different cycles being used for analysis 2. The different selection of cathodic/anodic current ranges. The cathodic current range chosen by the code is shown at 01:31:04 of the video. If I were to calculate the capacity from ECLab software, I would choose a continuous integration from the end part of cycle 3 and the beginning part of cycle 4 for this integration. If it's other scenarios you may need to explain your situations more. Thanks again for your support.

[@payam1597]

@@EChem_Channel Thank you for the reply. I have used the same cycles for analysis and comparison, so the first point can be ruled out. I get your point by the 2nd point, but I am not good at coding and unfortunately, it is difficult for me to follow. I know it is too much to ask, but would it be possible for you to add a new column to two of the generated text files (I_E and C_E) for the surface area of CV curves (A vs V)? This way I can easily calculate the specific energy and power density obtained from the surface area of CV curves as well (without segregation of cathodic and anodic branches). Thank you.

[@EChem_Channel]

@@payam1597 Hello, sorry for the late reply... if you follow the last part, we used a different way to generate energy and power density.