PNNL

Abstract

The LiMnPO4·Li3V2(PO4)3/C composite cathode material was synthesized from Mn(VO3)2 nanosheet precursor, which was prepared by a hydrothermal method. The structure and morphology of the composite were systematically investigated by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM) and scanning transmission electron microscopy (STEM), etc. The LiMnPO4·Li3V2(PO4)3/C composite material exhibits a low polarization and high specific capacity of 150.7 mAh g-1 at 0.1C in voltage range of 2.5–4.5V, and excellent cycle and rate performance for its stable nanocomposite framework. The composite material dominantly exists in the morphological shape of nanograins and nanorods, which increases the surface area and hence facilitate the electrolyte penetration. The nanoparticle components were even further identified in detail.