Title :
Synthesis and characterization of spherical LiNi0.7Co0.15Mn0.15O2 via co-precipitation
Author :
Xinxin Tan ; Weidong Wang ; Yougen Tang ; Haiyan Wang ; Qianqian Ding
Author_Institution :
Coll. of Chem. & Chem. Eng., Central South Univ., Changsha, China
Abstract :
Spherical LiNi0.7Co0.15Mn0.15O2 powders with phase-pure and well-ordered layered structure were successfully synthesized by firing spherical Ni0.7Co0.15Mn0.15(OH)2 precursor and LiOH·H2O in oxygen. The structure, morphology and electrochemical properties of LiNi0.7Co0.15Mn0.15O2 calcined at different temperatures were studied. The average particles size of the powders was about 8-10¿m and the size distribution was relatively narrow. The LiNi0.7Co0.15Mn0.15O2 prepared at 750°C delivered a higher initial discharge capacity of 185.2 mAh/g and the capacity retention of 94.77% after 50 cycles within the voltage range 3.0-4.3 V at the 0.2C rate. The spherical LiNi0.7Co0.15Mn0.15O2 samples synthesized by the co-precipitation method show a good electrochemical performance.
Keywords :
calcination; cobalt compounds; discharges (electric); electrochemistry; firing (materials); lithium compounds; nickel compounds; particle size; powders; precipitation; LiNi0.7Co0.15Mn0.15O2; calcination; capacity retention; discharge capacity; electrochemical property; firing; morphological property; particle size; phase-pure layered structure; size distribution; spherical powders; structural property; temperature 750 degC; voltage 3.0 V to 4.3 V; well-ordered layered structure; Batteries; Biological materials; Cathodes; Chemical engineering; Heating; Inorganic materials; Lithium; Morphology; Powders; Temperature;
Conference_Titel :
Nanoelectronics Conference (INEC), 2010 3rd International
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-3543-2
Electronic_ISBN :
978-1-4244-3544-9
DOI :
10.1109/INEC.2010.5425145
