After changing a lithium ion (LFP) battery's SOC eg: 100 to 80 % and the cell is now made to rest to attain equilibrium. During this wait period, what all parameters change ? And it increases or decreases ?
So far, my finding were the charge transfer and double layer capacitance decreases during this wait time (through EIS spectra). Any other parameters change ? References will be useful.
I think you can get an idea just from thinking about what happens: after (fast) charging, the lithium distribution in your LFP is inhomogeneous in the cathode layer. During waiting the lithium distribution gets more homogeneous, so this explains the decreasing capacities. Also your measured potential should still change.
The other values also depend on the model you are using for evaluating your EIS.
Thank you. Could you tell what other values changes during relaxation ? I means the model values which you know
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