Lithium dendrites puncturing separator induced galvanostatic charge/discharge test problem in Li-symmetric cells

The overpotential of Li-symmetric cells with internal short circuits caused by lithium dendrites puncturing the separator during galvanostatic charge/discharge is very low and the overpotential curve shows a straight line without fluctuations, proportional to the test current. Therefore, during galvanostatic charge/discharge testing of Li-symmetric cells, special attention needs to be paid to the presence of short-circuit phenomena to avoid incorrectly attributing the low overpotential after a short circuit to the “excellent” Li⁺ transport and electrochemical reaction kinetics of the cells.