Author/Authors :
Zheng، Y. نويسنده , , Long، Michael H. نويسنده , , Zhou، L. نويسنده , , Wu، Z. S. نويسنده 1Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials & Ministry of Educational Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, China , , Zhou، X. نويسنده , , You، L. نويسنده 1Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials & Ministry of Educational Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, China , , Yang، Y. نويسنده , , Liu، J. نويسنده ,
Abstract :
An approach to recycle precious metals of cathode materials from spent lithium cobalt oxide
batteries by using organic citric acid and hydrogen peroxide has been studied in this paper. The effects of molar ratio,
solid-liquid ratio, reaction time and temperature on leaching efficiency of cobalt were investigated respectively.
Meanwhile the leaching kinetics equation of cobalt was established, and the apparent activation energy of leaching
reaction of cobalt was calculated out. The results show that when the molar ratio of citric acid to lithium cobalt oxides
is 4:1, solid-to-liquid ratio is 15 g/L, the reaction temperature is 90 !, the reaction time is 5 h and concentration of
H2O2 is 1.0 vol. %, the leaching efficiency could be up to 99.07%. The apparent activation energy of cobalt leaching
reaction is 45.724 KJ/mol, and by means of conducting fitting test for the relationship between lithium cobalt oxides
powder with different particle sizes and leaching efficiency, it can be concluded that the reaction of lithium cobalt
oxides using citric acid and hydrogen peroxide is chemical reaction control.
