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

fYear

2010

Firstpage

892

Lastpage

893

Abstract

Spherical LiNi_0.7Co_0.15Mn_0.15O₂ powders with phase-pure and well-ordered layered structure were successfully synthesized by firing spherical Ni_0.7Co_0.15Mn_0.15(OH)₂ precursor and LiOHÂ·H₂O in oxygen. The structure, morphology and electrochemical properties of LiNi_0.7Co_0.15Mn_0.15O₂ calcined at different temperatures were studied. The average particles size of the powders was about 8-10Â¿m and the size distribution was relatively narrow. The LiNi_0.7Co_0.15Mn_0.15O₂ prepared at 750Â°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 LiNi_0.7Co_0.15Mn_0.15O₂ 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; LiNi_0.7Co_0.15Mn_0.15O₂; 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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/INEC.2010.5425145

Filename

5425145