Preparation of Graphene Oxide/La₂Ti₂O₇ Composites with Enhanced Electrochemical Performances for Supercapacitors

A series of graphene oxide (GO)/lanthanum titanate (La₂Ti₂O_7, LTO) fiber composites were prepared through a hydrothermal method. The LTO fibers were homogeneously dispersed between the GO sheets. The structure and micromorphology of the GO/LTO composites were systematically studied. The composite exhibited a high specific capacitance of 900.6 F g^-1 at a current density of 1 A g^-1 in the 1 M H₂SO₄ and 10 wt % sucrose aqueous solution as the electrolyte. With the extended potential window of 1.8 V, the fabricated asymmetric supercapacitor device delivered a maximum energy density of 94.0 Wh kg^-1 at a power density of 750.1 W kg^-1. The GO/LTO composites could be promising materials for energy storage.