Electrode Property of Spinel-type LiNi<sub>0.5</sub>Mn<sub>1.5−</sub><i><sub>x</sub></i>Ti<i><sub>x</sub></i>O<sub>4</sub> (0 ≤ <i>x</i> ≤ 1.5) Prepared by Electrostatic Spray Deposition

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  • FUJIMOTO Kenjiro
    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science Research Institute for Science and Technology, Tokyo University of Science
  • YOSHIMURA Mami
    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
  • SHIMONISHI Yuta
    DENSO CORPORATION
  • KOMINE Shigeki
    DENSO CORPORATION
  • YAMAGUCHI Yuki
    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science Research Institute for Science and Technology, Tokyo University of Science

Abstract

<p>Spinel-type LiNi0.5Mn1.5−xTixO4 powder library was prepared using the electrostatic spray deposition (ESD) method. Deposited powder was heat-treated at 700 °C for 3 hours in air. Phase identification of the X-ray diffraction patterns of the LiNi0.5Mn1.5−xTixO4 (0 ≤ x ≤ 0.5) prepared showed multi-phases of spinel, a slight amount of rock-salt-type LiyNi1−yO. In first charge-discharge capacities of LiNi0.5Mn1.5−xTixO4 (0 ≤ x ≤ 0.5) at current rates of 0.1 C and 1 C, LiNi0.5Mn1.5O4 (x = 0) and LiNi0.5Mn1.4Ti0.1O4 (x = 0.1) each showed a discharge capacity of about 100 mAh/g. LiNi0.5Mn1.4Ti0.1O4 was also found to retain its discharge capacity at a higher rate than LiNi0.5Mn1.5O4. The charge-discharge capacities were lower than those observed in the previous report, however, because the powders obtained included LiyNi1−yO type oxides as a second phase. Also, it was found that the decrease of rock-salt phase (LiyNi1−yO) was able to control by changing the atmospheric and powder shape-forming conditions.</p>

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