Ultrasound assisted synthesis of nano-sized lithium cobalt oxide.
Nano-sized HT-LiCoO(2) powders were prepared by sonochemical synthesis in an aqueous solution of lithium hydroxide containing cobalt hydroxide at approximately 80 degrees C without any further heat treatment at high temperature. The effects of the LiOH concentration, oxidation conditions, ultrasound irradiation time and temperature on the formation of the nano-sized HT-LiCoO(2) phase were investigated. The formation of the HT-LiCoO(2) phase was confirmed by X-ray diffraction and Raman spectroscopy. The TEM images showed the presence of HT-LiCoO(2) aggregates with a mean particle diameter of approximately 20 nm. The reaction mechanism of the ultrasound assisted synthesis of nano-sized LiCoO(2) was proposed on the basis of the XRD, X-ray absorption spectroscopy analysis and TEM observation of the reaction products taken during the course of the synthesis.
Kim
Kwang-Heon
KH
Division of Material Science and Engineering, Yonsei University, 134 Shinchon-dong, Seodaemoon-gu, Seoul 120-749, Republic of Korea.
Kim
Kwang-Bum
KB
D003035:Cobalt; D018020:Lithium Compounds / Q000737:chemistry; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000138:chemical synthesis*; D010316:Particle Size; D011208:Powders; D013059:Spectrum Analysis, Raman; D013696:Temperature; D014465:Ultrasonics; D014961:X-Ray Diffraction
D018020:Lithium Compounds; D010087:Oxides; D011208:Powders; C491691:lithium cobalt oxide; D003035:Cobalt; C028467:lithium hydroxide