[17p-PB4-1~5] 8.3 Plasma nanotechnology

[17p-PB4-4] Fabrication and Electrochemical Characterization of Li(Fe_0.7Mn_0.3)O₂ Thin Films Fabricated by Ion Beam Assisted Deposition Technique

〇(B)Haruto Sakaki¹, Kentaro Shinoda¹, Riki Kataoka², Yasushi Maeda², Yasuhiro Inada³, Takumi Ikenoue¹, Iwao Kawayama¹, Toshiya Doi¹ (1.Kyoto Univ., 2.AIST, 3.Ritsumeikan Univ.)

Keywords:

IBAD,positive electrode

To reduce the use of rare metals in Li-ion battery cathodes, Li(Fe_0.7Mn_0.3)O₂ thin films were fabricated by pulsed laser deposition (PLD) and ion beam-assisted PLD (IBAPLD). X-ray diffraction measurements revealed that both films possessed (111)-oriented disordered rock-salt (DRX) structure. Charge-discharge tests were performed on Li(Fe_0.7Mn_0.3)O₂ thin films prepared by IBAPLD on Al substrates. The capacity changed from 30 to 40 and 50 mAhg^-1 with increasing cycle numbers. The electrochemical properties of Li(Fe_0.7Mn_0.3)O₂ thin films will be discussed in detail based on cyclic voltammetry, XAFS, and AC impedance measurements.