期刊
ELECTROCHIMICA ACTA
卷 321, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.134669
关键词
Conversion electrode; Na-ion batteries; Tungsten trioxide; Magnetron sputtering; Anode
资金
- UEX
- Junta de Extremadura
- MICINN
- FEDER
- ESF
- European Regional Development Funds program (EU-FEDER)
- MINECO-AEI [201560E055, MAT2016-79866-R]
WO3 thin film electrodes were successfully prepared by magnetron sputtering (MS) deposition under an oblique angle configuration (OAD). Intercalation of Na ions in the tungsten oxide layers has been studied using electrochemical techniques. Sample characterization before and after sodium intercalation has been carried out by Raman, XPS and XRD measurements. ToF-SIMS analysis has been also performed in order to analyze the element depth profiles along the electrode thickness. Electron microscopy evaluation of the cross section confirms the porous structure of the coatings. Batteries integrating these WO3 electrodes have a discharge capacity of 120 mA h g(-1) at the initial cycles and show an adequate capacity retention upon 300 cycles. The WO3-OAD thin-films are proposed as promising electrodes for Na-ion batteries. (C) 2019 Elsevier Ltd. All rights reserved.
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