Micropore self-repairing/blocking by the rapid carbonization of MOFs/graphene for various sodium storage

Abstract

Metal-organic framework materials (MOFs) and graphene composite materials are the promising anode for sodium ion battery due to the excellent specific performances. Introducing graphene gives MOFs the increased active sites and improved electronic conductivity, showing a positive effect for the overall enhancement of properties. In this work, different from the enhanced sodium storage capacity after introducing reduced graphene oxides into MOFs derived materials in previous researches, the micropore structures of MOFs/graphene composite materials in the same systems are repaired by a self-repairing/blocking process during rapid carbonization process, which thus hinders the diffusion kinetics of Na+ and decreases the sodium storage capacity negatively.