This calculation is inspired by the parallel lines method[1]
pseudocapacitor percentage calculation based on:
Furthered Improvement should focus on : multiple peaks k1 and k2 negative values ...
Reference:
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"A Procedure for Evaluating the Capacity Associated with Battery-Type Electrode and Supercapacitor-Type One in Composite Electrodes" https://iopscience.iop.org/article/10.1149/2.1131816jes
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B. E. Conway, Electrochemical Supercapacitors. Scientific Fundamentals and Technological Applications., Kluwer Academic. New York 1999.