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首页> 外文期刊>RSC Advances >Co3O4 nanoparticles grown on N-doped Vulcan carbon as a scalable bifunctional electrocatalyst for rechargeable zinc-air batteries
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Co3O4 nanoparticles grown on N-doped Vulcan carbon as a scalable bifunctional electrocatalyst for rechargeable zinc-air batteries

机译：N掺杂的Vulcan碳上生长的Co3O4纳米颗粒，作为可扩展的双功能电催化剂，用于可充电锌空气电池

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Bifunctional electrocatalysts for rechargeable metal-air batteries often encounter catalyst leaching-resultant performance degradation upon cycling of the batteries, which requires an improvement in stability of the catalyst nanoparticles via immobilization onto conductive supports. Herein, we report in situ growth of Co3O4 nanoparticles onto concurrently synthesized N-doped Vulcan carbon (NVC) to produce Co3O4/NVC powders with tuneable loading density as scalable, stable and efficient hybrid bifunctional electrocatalysts. With an optimized composition the hybrid catalyst exhibited satisfactory ORR and OER activity, giving a voltage difference as small as 0.10 V between the onset potential and half-wave potential at discharge. The good performance of the rechargeable zinc-air batteries constructed using Co3O4/NVC as air-cathodes suggests such a hybrid bifunctional electrocatalyst is a practical and cost-effective solution for applications which demand a large quantity of materials, e.g. in grid-scale energy storage and electric vehicles.
机译：用于可再充电金属-空气电池的双功能电催化剂经常在电池循环时遇到催化剂浸出导致的性能下降，这需要通过固定在导电载体上来提高催化剂纳米颗粒的稳定性。在这里，我们报告原位生长Co3O4纳米粒子到同时合成的N掺杂的Vulcan碳（NVC）上，以生产具有可调节的负载密度的Co3O4 / NVC粉末，作为可扩展，稳定和高效的混合双功能电催化剂。通过优化的组成，杂化催化剂表现出令人满意的ORR和OER活性，在放电时的起始电势和半波电势之间的电压差小至0.10V。使用Co3O4 / NVC作为空气阴极构造的可再充电锌空气电池的良好性能表明，这种混合型双功能电催化剂对于需要大量材料（例如碳纳米管）的应用是一种实用且经济高效的解决方案。在电网规模的储能和电动汽车中。

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