Co nanoparticles combined with nitrogen-doped graphitic carbon anchored on carbon fibers as a self-standing air electrode for flexible zinc-air batteries
Co nanoparticles combined with nitrogen-doped graphitic carbon anchored on carbon fibers as a self-standing air electrode for flexible zinc-air batteries
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DOI：
10.1039/d0ta00793e
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发表时间：
2020-04-21
影响因子：
11.9
通讯作者：
Huo, Fengwei
中科院分区：
文献类型：
--
作者：
Chen, Yangshen;Zhang, Wenhui;Huo, Fengwei
尽管锌空气电池（ZAB）由于其优点而被广泛研究，但是仍然存在改进柔性ZAB的空间，特别是通过确定合适的自立式柔性电极材料。在这里，嵌入有Co纳米颗粒和氮掺杂的石墨碳（Co@ NPCF）的柔性多孔纳米纤维已被合成为在柔性ZAB中作为自立和无粘合剂的电极。这些具有氮掺杂的石墨碳的独特纳米纤维有利于电子传输、氧捕获和OH-离子的解吸。Co@NPCFs能提供丰富的活性中心，对析氧反应和氧还原反应均表现出良好的催化活性。所制备的具有柔性自立网络结构的复合材料可以直接应用于柔性ZAB，并且在弯曲电池时与凝胶电解质良好接触。因此，该策略为ZAB的柔性自立电极提供了一个很好的例子，并且也可以扩展到其他柔性电能存储设备。
Although zinc-air batteries (ZABs) have been extensively studied due to their advantages, there is still room for improving flexible ZABs especially by identifying suitable self-standing flexible electrode materials. Here, flexible porous nanofibers embedded with Co nanoparticles and nitrogen-doped graphitic carbon (Co@NPCFs) have been synthesized to work as self-standing and binder-free electrodes in flexible ZABs. These unique nanofibers with nitrogen-doped graphitic carbon are beneficial for electron transport, oxygen capture and desorption of the OH- ions. The Co@NPCFs could provide rich active sites and exhibit good catalytic activity for both the oxygen evolution reaction and the oxygen reduction reaction. The fabricated composites with a flexible self-standing network structure can be applied directly to flexible ZABs and contact well with gel electrolyte when bending the batteries. As a result, this strategy provides a good example of flexible self-standing electrodes for ZABs and can also be extended to other flexible electric energy storage devices.