To achieve synchronous measurements of EIS and neutron imaging, communication was established between Gamry and the neutron experimental control system. Initially, Gamry remained idle and only initiated EIS measurements upon receiving an execution signal from the neutron camera control script. Immediately after an execution signal was sent to Gamry to initiate EIS measurements, the neutron CMOS detector started capturing images continuously in 10 s intervals until completion of EIS measurements, after which Gamry returned to an idle state. The experimental spectra were fitted using the RelaxIS ® software (the fitting result can be seen in Fig. ), and the frequency points above the real axis were selected. The (RC)R(RC) model was used as it has a simple structure and can be easily fitted. The first RC represents the charge transfer process on the cathode side, R in the middle represents the Ohmic impedance, and the second RC depicts the processes on the anode side.