TITLE:
Reclamation of Lithium Cobalt Oxide from Waste Lithium Ion Batteries to Be Used as Recycled Active Cathode Materials
AUTHORS:
Rakibul Qadir, Fahmida Gulshan
KEYWORDS:
LiCoO2, Lithium Ion Battery (LIB), Reclamation of LiCoO2, Leaching, Active Cathode Materials
JOURNAL NAME:
Materials Sciences and Applications,
Vol.9 No.1,
January
18,
2018
ABSTRACT: Waste laptop batteries (Type-Lithium ion) have been collected and
manually dismantled in the current work. Active electrode materials were
scraped off from the copper current collector and polyethylene separators. The
aluminum current collectors were found to be severely damaged and attached with
the electrode material. It was treated with NaOH later to be recovered as Al2O3. The leaching of LiCoO2 was done by 3 M HCl aided by 5% H2O2 at 60°C from the scraped active electrode materials (LiCoO2 and
graphite) leaving the graphite completely. Co was precipitated as hydroxide by
the addition of NaOH and later converted to Co3O4. The
remaining solution was treated with saturated Na2CO3 to
acquire Li2CO3 as crystalline precipitate with high
purity. The recovery of Co and Li was 99% and 30%, respectively. Co3O4 and Li2CO3were mixed in stoichiometric proportions and
calcined around 950°C with air supply to achieve LiCoO2 successfully.