Cobalt-Metal-Based Cathode for Lithium–Oxygen Battery with Improved Electrochemical Performance

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• 作者：Chen Shen ; Zhaoyin Wen ; Fan Wang ; Tian Wu ; Xiangwei Wu
• 刊名：ACS Catalysis
• 出版年：2016
• 出版时间：July 1, 2016
• 年：2016
• 卷：6
• 期：7
• 页码：4149-4153
• 全文大小：366K
• 年卷期：0
• ISSN：2155-5435

文摘

Metal-oxide-based free-standing cathodes for Li–O₂ batteries have been widely reported due to the high stability and catalytic activity of metal oxides. Herein, we present a novel cobalt-metal-based free-standing cathode for Li–O₂ battery. By replacing the metal-oxide catalysts with cobalt metal, the conductivity of the electrode was improved. On the other hand, the oxide layer on the surface of metal particles could still act as an effective catalyst during cell operation. Consequently, the metal-based electrodes delivered high discharge capacity with relatively low overpotential. A long battery life with 160 cycles was also achieved.