A Novel Process of Cobalt Powder Preparation from Spent Lithium Ion Batteries
ZHOU Tao
FAN Bailin
XU Liping
XU Bao
Abstract：An innovative process was proposed for the preparation of cobalt powders from spent lithi‐um ion batteries (LIBs) ,which includes pretreatment ,acid leaching ,preparation of cobalt powder proce‐dures .First ,cathode active materials obtained after pretreatment were leached with citric acid and hydrogen peroxide .T hen target product of cobalt pow ders can be obtained by hydrazine reduction of Co ions in the leaching solution .The optimal conditions for preparing cobalt powder were obtained by contrast experi‐ment .T he experiment results show that over 90 % cobalt can be recovered as cobalt pow ders under the op‐timal conditions of reaction temperature‐80 ℃ ,molar ratio of N2 H4/Co2+ -1∶2 .5 ,reaction time‐30 min and pH=12 .The obtained cobalt powders posses two mixed phase of hcp and ccp .The morphology of co‐balt pow ders obtained is spherical and the average particle size of obtained cobalt pow der is 0 .65 μm .
Keywords：spent lithium ion batteriescobalt powderhydrazine reductioncitric acid
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 9-13 )