Monodisperse mesoporous Li9V3(P2O7)3(PO4)2 microspheres prepared via a hydrothermal method as cathode material for lithium-ion batteries

• Published in: Materials letters Vol. 92; pp. 247 - 251
• Main Authors: Gu, G.F., Tang, D.M., Wu, P., Tian, H.Y., Tong, D.G.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2013
• Subjects: batteries; Cathode; Composite materials; electrochemistry; electrodes; Fourier transform infrared spectroscopy; Hydrothermal method; Li9V3(P2O7)3(PO4)2; Microstructure; nitrogen; scanning electron microscopy; transmission electron microscopy; X-ray diffraction; Li9V3(P2O7)3(PO4)2; Composite materials; Hydrothermal method; Microstructure; Cathode
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2012.10.115

A hydrothermal approach was developed to synthesize monodisperse Li9V3(P2O7)3(PO4)2 microspheres consisting of nanoplates arranged in an open three-dimensional mesoporous structure. Conductive polyaniline (PANI) was deposited onto the Li9V3(P2O7)3(PO4)2 microspheres to increase their rate capability. The samples were investigated using X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, N2 adsorption–desorption, tap density, Fourier transform infrared spectroscopy, and electrochemical methods. The Li9V3(P2O7)3(PO4)2/PANI microspheres were found to have excellent rate capability and cycle stability, exhibiting a discharge capacity of 139mAhg−1 at 0.1C, which remained approximately 110mAhg−1 at 5C and 94mAhg−1 at 10C for a total of 500cycles at 2.5–4.6V. ► Monodisperse mesoporous Li9V3(P2O7)3(PO4)2 microspheres were prepared. ► The microspheres have a high tap density of 1.8gcm−3. ► Li9V3(P2O7)3(PO4)2/PANI has excellent rate capability and cycle stability.