Hey, I'm working right now in some battery characterization and I recently ran a charge/discharge test on a LIR2032 coin cell battery. I'm getting this graph (purple and blue with square signal) but It really doesn't look like a galvanostatic curve so I was hoping you could help me figuring it out how to get one because all of the parameters of the test seem fine for me. For this I'm using a SMU that sources voltage and measures current and I'm also using a RC circuit but instead of the capacitor I have my coin battery. Any help would be very useful, thanks!
Dear Ana,
I think there might be a problem in the order of charging and discharging.
The first graph seems to be a half cell of your positive electrode material with lithium metal and second graph seems to be half cell of your negative electrode material with lithium metal. Ideally, first we do charging for the positive electrode material whereas, in your case you did discharging and in the similar way for negative electrode you did charging but we do discharging.
I think you could try to reverse the order of charging and discharging. That might give you better result.
Please refer to this website
https://batteryuniversity.com/
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