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

Abstract

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