Synthesis of Li2CoTi3O8 fibers and their application to lithium-ion batteries

Li2CoTi3O8 fibers have been synthesized by an electrospinning method and investigated as an anode material for rechargeable lithium-ion batteries. The structure and electrochemical properties of the Li2CoTi3O8 fibers were systematically investigated. Characterization of data collected with high-resolution transmission electron microscopy and scanning electron microscopy reveal that the Li2CoTi3O8 fibers have an average diameter of 300 nm, and the individual fiber is composed of nanoparticles with an average diameter of 48 nm. The nanoparticles not only shorten the distance for Li-ions and electrons to transport but also possess good electrodes electronic contact and high surface area. The results of electrochemical measurements show that the as-prepared Li2CoTi3O8 electrode deliver a specific capacity of 388 mAh g−1 for the first cycle with an irreversible capacity of 156 mAh g−1 and finally remains 237 mAh g−1 after 30 cycles at 50 mA g−1. Its electrochemical performance at subsequent cycles exhibits high cycling capacity and rate capability.

► A simple electrospinning method has been developed to fabricate Li2CoTi3O8 fibers.
► Li2CoTi3O8 fibers as anode material for lithium-ion batteries.
► Li2CoTi3O8 electrode can remain the capacity of 237 mAh g−1 after 30 cycles at 50 mA g−1.
► An irreversible capacity loss of 156 mAh g−1 occurs during the first cycle.
► Li2CoTi3O8 anode exhibits good cycle performance and high rate capability.