Article ID Journal Published Year Pages File Type
7888243 Ceramics International 2018 19 Pages PDF
Abstract
Lithium vanadium fluorophosphate (LiVPO4F) has been attracted increasing attention as an advanced cathode for Li-ion batteries because of its excellent thermal stability and high operating voltage. Nevertheless, the pure LiVPO4F possesses a low electrical conductivity which prevents its usage for practical application in energy storage. In this work, the CNTs-decorated LiVPO4F/C (CNTs@LiVPO4F/C) nanocomposite has been prepared via a conventional sol-gel approach. The XRD results reveal that all the diffraction peaks obtained for CNTs@LiVPO4F/C are indexed to the triclinic structure. TEM images show that the conductive CNTs are distributed homogeneously over the LiVPO4F/C particles. Benefiting from the enhanced conductivity, the as-prepared CNTs@LiVPO4F/C electrode exhibits outstanding electrochemical performance with high reversible capacity of 121.1 mAh g−1 at a high current rate of 10 C. Therefore, the novel CNTs@LiVPO4F/C cathode material developed from this investigation with superior Li-storage performance has promising practical applications in electrochemical energy storage systems.
Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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