纯相Li2MnO3薄膜的制备及作为锂离子电池正极材料的电化学行为

doi:10.3866/PKU.WHXB201407151

Abstract

Abstract:

Li₂MnO₃ materials were synthesized by solid state reactions. A series of Li₂MnO₃ thin films were fabricated at different temperatures under O₂ by pulsed laser deposition (PLD) using a home-made Li₂MnO₃ target. The structure and morphology of the as- prepared Li₂MnO₃ thin films were characterized by X- ray diffraction (XRD), Raman spectroscopy, and scanning electron microscopy (SEM). Their electrochemical performance was also investigated. The results show that the crystallinity of the thin films increased with an increase in deposition temperature, and the thin film electrode prepared at lower than 25 ℃ did not work well. The highest electrochemical activity was achieved by the thin film deposited at 400 ℃, and this result is consistent with our previous report on powder materials. The Li₂MnO₃ thin film electrodes deposited at 400 and 600 ℃ exhibited lower discharge voltage decay upon cycling compared with the powder electrode.

Key words: Li₂MnO₃ thin film, Cathode material, Pulsed laser deposition, Potential decay, Li-ion battery

ZHENG Jie-Yun, WANG Rui, LI Hong. Fabrication and Electrochemical Behavior of a Pure-Phase Li₂MnO₃ Thin Film for Cathode Material of Li-Ion Batteries[J]. Acta Phys. -Chim. Sin. 2014, 30(10), 1855-1860. doi: 10.3866/PKU.WHXB201407151

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Fabrication and Electrochemical Behavior of a Pure-Phase Li₂MnO₃ Thin Film for Cathode Material of Li-Ion Batteries

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Fabrication and Electrochemical Behavior of a Pure-Phase Li2MnO3 Thin Film for Cathode Material of Li-Ion Batteries

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Fabrication and Electrochemical Behavior of a Pure-Phase Li₂MnO₃ Thin Film for Cathode Material of Li-Ion Batteries