▎ 摘　　要

Nb2O5@ carbon/ reduced graphene oxide (M-Nb2O5@ C/rGO) composites are fabricated by annealing the precursor of graphene oxide supported Nb-based metal organic frameworks for the first time. The lithium ion capacitor using M-Nb2O5@ C/rGO as the anode and activated carbon as the cathode delivers a high energy density of 71.5 W h kg(-1) and excellent cycling stability.