Year: 2025
Type: article
Abstract: In order to effectively recover Li from cathode active materials of lithium-ion batteries, model samples of LiCoO2 mixed with polyvinylidene fluoride (PVDF) were calcined at temperatures of 350–700 °C under an Ar or air atmosphere. Complete Li recovery was achieved by calcining the model sample at 400 °C under an Ar atmosphere, followed by water leaching. Additionally, to immobilize PVDF-derived F, an impurity in Li purification, we explored the use of calcium compounds (Ca(OH)2 and CaCO3) and a layered double hydroxide in both dry and wet processing methods. In the wet process, F was fixed by adding Ca(OH)2 to an aqueous LiF solution containing 1000 ppm of F. We confirmed that 98.6% of F was successfully removed from the solution after repeated fixation procedures. Furthermore, the unreacted Ca in the solution was separated and removed as CaCO3 by concentrating the solution.
Source: Materials
DOI: 10.3390/ma18092050
Authors: Kazuki Fujiwara, Kaisei Ito, Shunsuke Kuzuhara, Osamu Terakado, Natsuki Hosoya, Hideo Hayashi, Ryo Kasuya
Institutions: Sendai National College of Technology, National Institute of Technology, National Institute of Technology, Hakodate College, Yamaguchi Prefectural Industrial Technology Institute, Tokyo Metropolitan Industrial Technology Research Institute, National Institute of Advanced Industrial Science and Technology
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,137
OpenAlex ID: W4409966517