An aqueous rechargeable lithium-ion battery based on LiCoO nanoparticles cathode and LiV O nanosheets anode

Nanoparticles of lithiumcobalt oxide (LiCoO ) and nanosheets of lithium vanadium oxide (LiV O ) were synthesized by a citrate sol-gel combustion route. The physical characterizations of the electrodic materials were carried out by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and also X-ray diffraction (XRD) measurements. Near spherical nanoparticles of 100 nm and compact nanosheets with a few nanometers thick were observed by SEM and TEM for LiCoO and LiV O , respectively. XRD data indicated that the asprepared active materials presented pure phase of rhombohedral LiCoO with R-3m symmetry and monoclinic LiV O with p21/m symmetry. The kinetics of electrochemical intercalation of lithium ion into the nanoparticles of LiCoO and nanosheets of LiV O from 1.0 mol l-1 LiNO3 aqueous solution were investigated by cyclic voltammetry and chronoamperometry. An aqueous rechargeable lithium-ion battery consisting of LiCoO nanoparticles as positive and LiV O nanosheets as negative electrode was assembled. This battery represented a discharge voltage of about 1 V with good cycling performance. © Springer-Verlag 2011.