Nitrogen-Doped Porous Carbon Derived From Bimetallic Zeolitic Imidazolate Frameworks For Electrochemical Li+/Na+ Storage

Abstract Porous carbon is regarded as one of the most promising anode candidates for Li-ion battery and Na-ion battery. We herein demonstrate a series of nitrogen-doped porous carbon (NPC) by simply carbonizing bimetallic ZnCo-containing zeolitic imidazolate frameworks (ZnCo-ZIFs). The nitrogen content, specific surface area, pore size distribution and microstructure of prepared NPC are balanced by adjusting Zn2+/Co2+ molar ratio of ZnCo-ZIFs and carbonization process parameters. It is found that the optimized ZnCo-ZIF-derived NPC shows promise for electrochemical Li+/Na+ storage, which could be attributed to the hierarchical porous structure, large specific surface area and relatively high N-doping content.