Li3V2(PO4)3/C composite with hollow coaxial structure for high-capacity and high-rate performance in lithium-ion batteries

The Li3V2(PO4)(3)/C composite with hollow coaxial structure has been successfully synthesized via a facile repeated immersion method induced by cotton fibers. The morphologies, structures and properties are investigated by X-ray diffractometer, scanning electron microscopy and galvanostatic charge-discharge tests. Li3V2(PO4)(3)/C composite displays a unique hollow coaxial structure constructed by hollow carbon fibers filled with Li3V2(PO4)(3)/C particles inside and coated by Li3V2(PO4)(3)/C layer outside. Li3V2(PO4)(3)/C composite exhibits good rate performance with a specific capacity of 115.7 mAh g(-1) at 15 C rate between 3.0 and 4.3 V. The improved properties can be attributed to the formation for hollow coaxial structure. (C) 2018 Elsevier B.V. All rights reserved.