2019-Sustainable Industrial Processing Summit
SIPS2019 Volume 4: Kozlov Intl. Symp. / Sustainable Materials Recycling Processes and Products
| Editors: | F. Kongoli, S.V. Alexandrovich, D.V. Grigorievich, L.L. Igoryevich, I. Startsev, T.A. Vladimirovich |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2019 |
| Pages: | 193 pages |
| ISBN: | 978-1-989820-03-2 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Lithium Recycling from Used Li-ion Batteries using Innovative Dialysis with Lithium Ionic Conductor Membrane
Tsuyoshi Hoshino1;1NATIONAL INSTITUTES FOR QUANTUM AND RADIOLOGICAL SCIENCE AND TECHNOLOGY (QST), Rokkasho-mura, Kamikita-gun, Japan;
Type of Paper: Keynote
Id Paper: 165
Topic: 7
Abstract:
As a means of addressing global warming, the world is increasingly turning to the use of Li-ion batteries in electric vehicles and as storage batteries in the home. Therefore, there is a growing need for Li. I propose a method for recovering Li from used Li-ion batteries by using innovative dialysis, wherein Li only permeates from the positive electrode side to the negative electrode side through a Li ionic conductor functioning as a Li separation membrane (LISM). Measurements of the Li ion concentration at the negative electrode side, as a function of dialysis duration, showed that the Li recovery ratio increased to approximately 8.6% after 72 h with 5V applied electric voltage. Moreover, other ions in a solution of used Li-ion batteries did not permeate the LISM.
Figure 1 shows the proposed Li recovery method. This innovative method involves the use of an LISM whereby only Li ions in a solution of used Li-ion batteries permeate from the positive electrode side to the negative electrode side during electrodialysis; the other ions, including Co, Al, and F, do not permeate the membrane. Li0.29La0.57TiO3 was selected as the LISM. The positive side of the dialysis cell was filled with used Li-ion battery solution. Then the negative side was filled with distilled water. The applied dialysis voltage was 5 V, and electrode area was 16 cm2. The Li recovery ratio increased with electrodialysis time. Then, Co, Al, and F were not permeated.
After electrodialysis, CO2 gas was bubbled in the Li recovery water to produce lithium carbonate (Li2CO3) as a raw material for Li-ion batteries. The Li2CO3 deposition was easily generated by the reaction of CO2 gas and the Li recovery solution as a lithium hydroxide (LiOH) solution (Fig. 2).