Patent ID: 6391492
Filing Date: 2002-05-21
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
A method of manufacturing a positive electrode active material of a lithium secondary battery, said method comprising:forming a transition metal oxide compound having a crystal grain size of 500 Ã¥ or less, said crystal grain size having been evaluated from the peak half width and the angle of diffraction of x-ray diffraction curve in accordance with Scherrer's Formula, t=0.9&lgr;/B cos &thgr;B, wherein t is the size of the crystal grain, &lgr; is the wavelength of the x-ray beam, B is the peak half width, and &thgr;B is the angle of diffraction, and composed of an oxide of a transition metal selected from the group consisting of titanium, vanadium, chromium, manganese, iron, cobalt, nickel, and copper, wherein the transition metal oxide having been formed by a solution reaction employing an oxygen source selected from the group consisting of water, alcohol, and hydroxide.