Improvement of Electrochemical Properties of Lithium鈥揙xygen Batteries Using a Silver Electrode

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• 作者：Jin-Bum Park ; Xiangyi Luo ; Jun Lu ; Chang Dae Shin ; Chong Seung Yoon ; Khalil Amine ; Yang-Kook Sun
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：July 9, 2015
• 年：2015
• 卷：119
• 期：27
• 页码：15036-15040
• 全文大小：344K
• ISSN：1932-7455

文摘

Silver (Ag) electrodes are prepared by an electrodeposition method at 鈭?.25 V versus SCE. To evaluate the effect of particle size on Li鈥揳ir cells, deposition times are 3, 10, 30, and 300 s. When cycled at a current density of 0.032 mA cm^鈥?, the Ag-deposited electrode for 300 s shows very low polarization corresponding to the oxygen evolution reaction potential at 3.6 V. X-ray diffraction studies confirm that the main discharge product is Li₂O₂, and the results of scanning electron microscopy and transmission electron microscopy of the discharged electrodes show lithium peroxides at different positions due to the limitation of active sites on silver particles.