When testing materials at high operating currents, a large amount of heat is generated. Button cells are a poor variant for this type of testing (even if you are measuring something at high current, it refers to a higher, uncontrolled temperature of electrode). Typically, other types of cells are used for such testing, for example pouch-cell or homemade ones. But even in the version of the button cell, a decrease in the cathode thickness and an increase in the proportion of carbon in the composition lead to an limited improvement of the current characteristics.

An Giang Nguyen failed mean. it charge and discharge within fraction of seconds with close to zero capacity. This is happening for all the cathode material even for commercial purchased one.

I am attaching the EIS before charge-Discharge and charge-profile upto C (1C=140 mAh/g) rate.

When testing materials at high operating currents, a large amount of heat is generated. Button cells are a poor variant for this type of testing (even if you are measuring something at high current, it refers to a higher, uncontrolled temperature of electrode). Typically, other types of cells are used for such testing, for example pouch-cell or homemade ones. But even in the version of the button cell, a decrease in the cathode thickness and an increase in the proportion of carbon in the composition lead to an limited improvement of the current characteristics.