期刊
ELECTROCHIMICA ACTA
卷 52, 期 8, 页码 2822-2828出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2006.07.013
关键词
thin-film battery; LiNi0.5Mn1.5O4; pulsed laser deposition
LiNi0.5Mn1.5O4 thin films were prepared by pulsed laser deposition (PLD) on stainless steel substrates. The growth of the films has been studied as a function of substrate temperature and oxygen partial pressure in deposition, using X-ray diffraction (XRD) and field-emission scanning electron microscopy (FESEM). Electrochemical properties of LiNi0.5Mn1.5O4 thin film cathodes were investigated using cyclic voltammetry and galvanostatic charge/discharge against a lithium anode. The initial capacity and capacity retention of the films are highly dependent on the crystallinity and purity of the films. LiNi0.5Mn1.5O4 thin films grown at 600 degrees C in an oxygen partial pressure of 200 mTorr are well crystallized with high purity, exhibiting excellent capacity retention between 3 and 5 V with a LiPF6-based electrolyte. (c) 2006 Elsevier Ltd. All rights reserved.
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