We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
High-Yield One-Pot Recovery and Characterization of Nanostructured Cobalt Oxalate from Spent Lithium-Ion Batteries and Successive Re-Synthesis of LiCoO<sub>2</sub>.
- Authors
Young Min Park; Hana Lim; Ji-Hoon Moon; Ho-Nyun Lee; Seong Ho Son; Hansung Kim; Hyun-Jong Kim
- Abstract
A complete recycling process for the cathode material of spent lithium-ion batteries is demonstrated with a simple two-step process comprised of one-pot cobalt recovery to nanostructured materials and single step synthesis of LiCoO2. For the facile and efficient recovery of cobalt, we employ malic acid as a leaching agent and oxalic acid as a precipitating agent, resulting in nanostructured cobalt oxalate. X-ray diffraction and Fourier transform infrared spectroscopy (FT-IR) analysis clearly show that cobalt species are simultaneously leached and precipitated as cobalt oxalate with a high yield of 99.28%, and this material can then be used as a reactant for the synthesis of LiCoO2 for use as a cathode material. In addition to its advantages in simplifying the process, the proposed method allows for not only enhancing the efficiency of cobalt recovery, but also enabling reaction without a reducing agent, H2O2. Through successive single-step reaction of the obtained cobalt oxalate without any purification process, LiCoO2 is also successfully synthesized. The effect of the annealing temperature during synthesis on the nanostructure and charge-discharge properties is also investigated. Half-cell tests with recycled LiCoO2 exhibit a high discharge capacity (131 mA.h.g-1) and 93% charge-discharge efficiency.
- Subjects
LITHIUM-ion batteries; COBALT; FOURIER transform infrared spectroscopy; X-ray diffraction; PRECIPITATION (Chemistry)
- Publication
Metals (2075-4701), 2017, Vol 7, Issue 8, p303
- ISSN
2075-4701
- Publication type
Article
- DOI
10.3390/met7080303