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首页> 外文期刊>Catalysis science & technology >Defect-rich boron doped carbon nanotubes as an electrocatalyst for hybrid Li–air batteries
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Defect-rich boron doped carbon nanotubes as an electrocatalyst for hybrid Li–air batteries

机译：富含缺陷的硼掺杂碳纳米管作为混合液 - 空气电池的电催化剂

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摘要

Carbon nanotubes (CNTs) have been used as a cathode material for hybrid Li–air batteries (HLABs); however, their catalytic abilities for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are relatively limited. Herein, to improve their catalytic performance, we have synthesized a boron-doped CNT (BC3NT) with varying boron contents. The Raman spectrum proves that the more defects are due to the higher boron content. And HLABs based on BC3NT show great cyclability and catalytic performance in air, with an overpotential value of 0.3 V for 200 hours at a current density of 0.05 mA cm−2. Furthermore, theoretical calculations with density functional theory (DFT) confirm the effects of topological defects of BC3NT on the ORR and OER. Since boron is doped into the CNT, BC3NT containing a large amount of defect rings is obtained. And the generation of defects was conducive to the battery reaction. Accordingly, as a positive electrode material for HLABs, BC3NT is more conducive to the ORR and OER, and the topological defect ring generated by it improved the ORR and OER performance.
机译：碳纳米管（CNT）已被用作混合Li – Air电池（HLABS）的阴极材料;然而，它们对氧还原反应（ORR）和氧气进化反应（OER）的催化能力相对有限。在此，为了提高其催化性能，我们已经合成了具有不同硼含量的硼掺杂的CNT（BC3NT）。拉曼光谱证明，缺陷越多，是由于硼含量较高。基于BC3NT的HLABS在空气中显示出极高的环状性和催化性能，在200小时内，电势值为0.3 V，电流密度为0.05 mA cm -2。此外，使用密度功能理论（DFT）的理论计算证实了BC3NT拓扑缺陷对ORR和OER的影响。由于将硼掺入CNT中，因此获得了包含大量缺陷环的BC3NT。缺陷的产生有利于电池反应。因此，作为HLABS的正电极材料，BC3NT更有利于ORR和OER，并且由其产生的拓扑缺陷环改善了ORR和OER性能。

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