Li Wan et al. demonstrated the synthesis of nitrogen-doped porous carbon/CNT composite materials (CNT@CZIF) by heterogeneous nucleation growth of ZIF-8 on CNTs and subsequent carbonization . In this study, CNTs was served as a high conductivity network, and increased the ion diffusion by lowering the interfacial resistance of carbon particles derived from ZIF-8. On the other side, ZIF-8 particles on CNTs offered nitrogendoped carbon as highly active sties after pyrolysis. Initially, MWCNTs were modified with polydopamine (CNT@PDA) by ethanol-mediated oxidative dopamine polymerization process.