The emerging one-dimensional wire-shaped supercapacitors (SCs) with structural advantages of low mass/volume structural advantages hold great interests in wearable electronic engineering. Although graphene fiber (GF) has full of vigor and tremendous potentiality as promising linear electrodefor wire-shaped SCs

simultaneously achieving its facile fabrication process and satisfactory electrochemical performance still remains challenging to date. Herein

two novel types of graphene hybrid fibers

namely ferroferric oxide dots (FODs)@GF and N-doped carbon polyhedrons (NCPs)@GF

have been proposed

via

a simple and efficient chemical reduction-induced fabrication. Synergistically coupling the electroactive units (FODs and NCPs) with conductive graphene nanosheets endows the fiber-shaped architecture with boosted electrochemical activity

high flexibility and structural integrity. The resultant FODs@GF and NCPs@GF hybrid fibers as linear electrodes both exhibit excellent electrochemical behaviors

including large volumetric specific capacitance

good rate capability

as well as favorable electrochemical kinetics in ionic liquid electrolyte. Based on such two linear electrodes and ionogel electrolyte

a high-

performance wire-shaped SC is effectively assembled with ultrahigh volumetric energy density (26.9 mW·h·cm

-3

)

volumetric power density (4900 mW·cm

-3

) and strong durability over 10

000 cycles under straight/bending states. Furthermore

the assembled wire-shaped SC with excellent flexibility and weavability acts as efficient energy storage device for the application in wearable electronics.