Investigation of supersonic-wave treatment effect on LiNi0.60Co0.22Mn0.18O₂ as a cathode material of Li ion battery

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  • SARUWATARI Hidesato
    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
  • IINO Jun-ya
    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
  • KITAMURA Naoto
    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
  • IDEMOTO Yasushi
    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science

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  • Investigation of supersonic-wave treatment effect on LiNi<sub>0.60</sub>Co<sub>0.22</sub>Mn<sub>0.18</sub>O<sub>2</sub> as a cathode material of Li ion battery

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The electrochemical properties and crystal structure of LiNi0.60Co0.22Mn0.18O2 treated by supersonic-waves in a Zn-containing solution were investigated by performing charge–discharge tests, X-ray diffraction (XRD), an inductively coupled plasma (ICP) analysis, scanning electron microscopy (SEM), transmission electron microscopy, energy dispersive X-ray spectroscopy (TEM-EDX) and synchrotron powder XRD. Furthermore, the supersonic-wave bath solution was characterized by pH measurements. The electrochemical properties and crystal structure of LiNi0.60Co0.22Mn0.18O2 treated with supersonic-waves in a Zn-containing C2H5OH solution did not change from pristine. On the other hand, Zn2+ was partially substituted in the LiNi0.60Co0.22Mn0.18O2 treated with supersonic-waves in a Zn-containing aqueous solution. As a result of the ICP analysis of the supersonic-wave-treated samples and pH measurement of the supersonic-wave bath, the Li was dissolved in the supersonic-wave bath which contained H2O from the LiNi0.60Co0.22Mn0.18O2. This suggests that Li defects are the initial points of Zn substitution by the supersonic-wave treatment.

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