Modified MXene/Holey Graphene Films for Advanced Supercapacitor Electrodes with Superior Energy Storage.

ABSTRACT: MXene films are attractive for advanced supercapacitor electrodes requiring high volumetric energy density due to their high redox capacitance combined with extremely high packing density. However, the self-restacking of MXene flakes unavoidably decreases the volumetric performance, mass loading, and rate capability. Herein, a simple strategy is developed to prepare a flexible and free-standing modified MXene/holey graphene film by filtration of the alkalized MXene and holey graphene oxide dispersions, followed by a mild annealing treatment. After terminal groups (-F/-OH) are removed, the increased proportion of Ti atoms enables more pseudocapacitive reaction. Meanwhile, the embedded holey graphene effectively prevents the self-restacking of MXene and forms a high nanopore connectivity net

SUBMITTER: Fan Z 

PROVIDER: S-EPMC6193160 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature