2018 - Sustainable Industrial Processing Summit & Exhibition
4-7 November 2018, Rio Othon Palace, Rio De Janeiro, Brazil
Seven Nobel Laureates have already confirmed their attendance: Prof. Dan Shechtman, Prof. Sir Fraser Stoddart, Prof. Andre Geim, Prof. Thomas Steitz, Prof. Ada Yonath, Prof. Kurt Wüthrich and Prof. Ferid Murad. More than 400 Abstracts Submitted from about 60 Countries.
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    [Solid and liquid wastes from industrial processes: Innovations in material recovery and environmental protection]
    Lithium Recycling from Used Li-ion Batteries using Innovative Electrodialysis with Lithium Ionic conductor
    Lithium Recycling from Used Li-ion Batteries using Innovative Electrodialysis with Lithium Ionic conductor
    Tsuyoshi Hoshino1;
    1ROKKASHO FUSION ENERGY RESEARCH CENTRE, Rokkasho-mura, Kamikita-gun, Japan;
    PAPER: 100/Electrochemistry/Invited (Oral)
    SCHEDULED: 12:35/Tue./Copacabana B (150/1st)



    ABSTRACT:
    In recent years, the industrial importance of lithium (Li) has increased due to its use in Li-ion batteries. Previously, the author had developed a method for the recovery of Li from seawater using a Li ionic superconductor functioning as a Li-ion separation membrane (LISM). In this method, only Li ions were successfully recovered from seawater through the LISM. Consequently, the author then developed a new innovative method for recycling Li from used Li-ion batteries using the LISM. 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. Li<sub>0.29</sub>La<sub>0.57</sub>TiO<sub>3</sub> 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. Subsequently, Co, Al, and F were not permeated. After electrodialysis, CO<sub>2</sub> gas was bubbled in the Li recovery water to produce lithium carbonate (Li<sub>2</sub>CO<sub>3</sub>) as a raw material for Li-ion batteries. The Li<sub>2</sub>CO<sub>3</sub> deposition was easily generated by the reaction of CO<sub>2</sub> gas and the Li recovery solution as a lithium hydroxide (LiOH) solution. This new method for recycling Li-ion batteries shows good energy efficiency and is easily scalable. Thus, this electrodialysis method is suitable for the recovery of Li from used Li-ion batteries.

    References:
    [1] T. Hoshino, Desalination, 359, 59-63 (2015).