Nano-sized HT-LiCoO2 powders were prepared by sonochemical synthesis in an aqueous solution of lithium hydroxide containing cobalt hydroxide at ∼80 °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-LiCoO2 phase were investigated. The formation of the HT-LiCoO2 phase was confirmed by X-ray diffraction and Raman spectroscopy. The TEM images showed the presence of HT-LiCoO2 aggregates with a mean particle diameter of ∼20 nm. The reaction mechanism of the ultrasound assisted synthesis of nano-sized LiCoO2 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.
Bibliographical noteFunding Information:
This work was financially supported by the Ministry of Education and Human Resources Development (MOE), the Ministry of Commerce, Industry and Energy (MOCIE) and the Ministry of Labor (MOLAB) through the fostering project of the Lab of Excellency and the Second Stage of Brain Korea 21 Project in 2006.
All Science Journal Classification (ASJC) codes
- Chemical Engineering (miscellaneous)
- Environmental Chemistry
- Radiology Nuclear Medicine and imaging
- Acoustics and Ultrasonics
- Organic Chemistry
- Inorganic Chemistry