Flake-like LiCoO2 nanopowders were fabricated using electrospinning. To investigate their formation mech-anism, field-emssion scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy were carriedout. Among various parameters of electrospinning, we controlled the molar concentration of the precursor and the PVPpolymer. When the molar concentration of lithium and cobalt was 0.45 M, the morphology of LiCoO2 nanopowders wasirregular and round. For 1.27 M molar concentration, the LiCoO2 nanopowders formed with flake-like morphology. Forthe PVP polymer, the molar concentration was set to 0.011 mM, 0.026 mM, and 0.043 mM. Irregular LiCoO2 nanop-owders were formed at low concentration (0.011 mM), while flake-like LiCoO2 were formed at high concentration(0.026 mM and 0.043 mM). Thus, optimized molar concentration of the precursor and the PVP polymer may be relatedto the successful formation of flake-like LiCoO2 nanopowders. As a results, the synthesized LiCoO2 nanopowder can beused as the electrode material of Li-ion batteries.

[ ] a cathode material for lithium rechargeable batteries, was prepared using recycled . First, the cobalt hydroxide powders were separated from waste WC-Co hard metal with acid-base chemical treatment, and then the impurities were eliminated by centrifuge method. Subsequently, powders were prepared by thermal treatment of resulting . By adding a certain amount of and , the was obtained by sintering for 10 h in air at . The synthesized particles were characterized by X-ray diffraction (XRD) and Scanning Electron Microscope (SEM) analysis.

In the development of Molten Carbonate Fuel Cell, one of the serious problems is the dissolution of cathode material. Therefore, the development of the alternative cathode which is stable in molten carbonate is needed. In this research, the LiCoO2 was chosen as alternative cathode material. LiCoO2 powder was synthesized by high temperature calcination method and by citrate sol-gel method. And its structure and physical characteristics were analyzed by XRD, IR TGA and porosimeter. The conductivity and solubility of LiCoO2 electrode were also measured Homogeneous LiCoO2 powder was obtained by citrate sol-gel method at 445℃, however, obtained above 750℃ by high temperature calcination method. Homogeneous particle size distribution and fine powder were obtained by the citrate sol-gel method. LiCoO2 electrode showed higher electric conductivity (1.7 Ω^-1 ㎝^1) than NiO (0.1 Ω^-1 ㎝^-1) at 650℃. The solubilities of LiCoO2 electrode in electrolyte were varies 0.6 to 1.0 ppm during 200 hours. So, the solubilities of LiCoO2 were much lower than that of NiO.