I work with Li-S battery and I am trying Nitrogen-doped Porous carbon as a cathode material. The Capacity at 0.05C is approx 1000 mAh/g for the first cycle. The issue is that it almost take 1 day to get 1 cycle, and I see most of the publication report for 100 cycle! Does that means they run their battery for weeks?
Also how to calculate the Coulombic efficiency graph?
Dear Ahmed
Yes to get many cycles ca. 100 the battery has to take several days. If you want to decrease the time just increase the C-rate> Also you need to do rate capability and choose the appropriate C-rate. Efficiency is the division of discharge / charge capacity *100
Thank you for your answer A.M.A. Hashem, How to do rate capability and choose the best C-rate? I see most of the literature, they measure at 0.1C
Dear Ahmed Abdelkader
You don't need to wait 100 days (for example) to run your setup.
There are some discharge standard tests, specific for each type of the battery which last several seconds but simulates the entire thermal behavior of the cell which is a very time-saving method.
For more information, you can refer to website below:
https://www.chentech.com.tw/eindex/vivamus-pellentesque-euismod-tellus-vel-laoreet-est-tempus-interdum/
or you can send an E-Mail for me, I will upload a book for you containing all standard test cycles for Li cells.
BR
Respected Yasin Salami ,
I also need that book...I am writing you an email.
Dear Dr. Yasin Salami,
Iam writing mail to you. I also need that book because I am working on commercial battery cells testing.
Yasin Salami
I am agreed with respected A.M.A. Hashem, but i want to say that i observed in many papers that the during 1st cycle, the discharge capacity is more than charge capacity, then the coulombic efficiency will be greater than 100 %, on the other hand, the coulombic efficiency will be less than 100 % if charge capacity is divided by discharge capacity which is basically not correct, in some paper, the authors showed the formula discharge /charge capacities but their results are according to the reverse calculations, please comments
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