The practical calculated capacity of my coin cell LiCoO2/graphite is 0.640mAh. The electrolyte used is 1M LiPF6 in 1:1 EC/DEC. Immediately after assembling the cell, I charge at a given current that rises to 5mA due to the standards of my machine (VOLTCRAFT ALC 8500 expert).
However, as you can see in the picture, at the end of the charging the cell is not able to maintain its charge at the charging cut-off voltage. The cell kind of shorts cicuits or breaks with a fast rise in current and voltage.
My thoughts are that I am doing fast charging and the SEI is not properly built. But nonethelesss even if I am doing fast initial first charge immediately after assembly, I should still be able to get a discharge curve even its just one cycle. Please what could the problem be with my cell and can I still get a onetime discharge curve even if the SEI is not/properly formed?
I will be very grateful for an answer, really need a solution to this for my research or a link guide. Thank you.
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