Cobalt-Metal-Based Cathode for Lithium–Oxygen Battery with Improved Electrochemical Performance
Cobalt-Metal-Based Cathode for Lithium–Oxygen Battery with Improved Electrochemical Performance
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DOI：
10.1021/acscatal.6b00676
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发表时间：
2016-06
期刊：
影响因子：
12.9
通讯作者：
Chen Shen;Z. Wen;Fan Wang;Tian Wu;Xiangwei Wu
中科院分区：
文献类型：
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作者：
Chen Shen;Z. Wen;Fan Wang;Tian Wu;Xiangwei Wu
金属氧化物具有较高的稳定性和催化活性，已被广泛报道用于锂离子电池。在此，我们提出了一种新型的锂离子电池钴金属基自支撑正极。用金属钴代替金属氧化物催化剂，提高了电极的导电性。另一方面，金属颗粒表面的氧化层在电池运行过程中仍然可以起到有效的催化剂作用。因此，金属基电极具有较高的放电容量和相对较低的过电位。电池寿命长，可循环160次。
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.