The electrochemical impedance spectroscopies (EIS) of the electrode after 500 cycles were shown in Fig. S8. It could be seen that the values of Rct was determined to be 68.3Ω for NPHC, maintaining the faster kinetic process compared to NPHC-1 and NHC. The increased interfacial charge-transfer resistance may be increasing dissociative groups would emerge by decomposition of those intact pyridinc N (N6), pyrrolic N (N-5), and graphitic N, as the battery evaluation continued [44].