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The influence of preparation conditions on electrochemical properties of LiNi0.5Mn1.5O4 thin film electrodes by PLD |
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| Authors: | H Xia L Lu YS Meng |
| Affiliation: | a Advanced Materials for Micro- and Nano-System, Singapore-MIT Alliance, 4 Engineering Drive 3, Singapore 117576, Singapore b Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore c Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA |
| Abstract: | 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 °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. |
| Keywords: | Thin-film battery LiNi0 5Mn1 5O4 Pulsed laser deposition |
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