CuO/Co3O4 heterostructures with carbon nanotubes composites as ORR/OER electrocatalysts for Zn-air batteries
CuO/Co3O4 heterostructures with carbon nanotubes composites as ORR/OER electrocatalysts for Zn-air batteries
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DOI：
10.1016/j.est.2023.107485
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发表时间：
2023
影响因子：
9.4
通讯作者：
Xiaoke Zhang;Qianfeng Liu;Zhao Yan;Shimin Liu;Erdong Wang
中科院分区：
文献类型：
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作者：
Xiaoke Zhang;Qianfeng Liu;Zhao Yan;Shimin Liu;Erdong Wang
可充电锌空气电池（ZABs）具有成本低、本质安全、高能量密度和稳定充放电电压等优点，是一种很有前途的下一代能量转换和存储系统。然而，可充电ZABs最大的挑战是由于空气阴极上氧反应动力学缓慢而导致的相对较高的过电位，这需要具有高成本效益的高性能无贵金属双功能电催化剂。在此，我们开发了一种简单且可扩展的共沉淀策略，成功地制备了双功能氧电催化剂CuO/Co3O4@CNTs催化剂。这种独特的策略使CuO/ co3o4纳米颗粒能够在CNTs上均匀生长，同时热解过程导致超细CuO/ co3o4异质结构的产生。由于CuO/Co3O4中存在丰富的异质结构，界面上产生了氧空位和不饱和化学键。因此，CuO/Co3O4@CNTs具有0.78 V的双功能活性ΔE和良好的稳定性，可维持1000 h的充放电循环。
Rechargeable Zn-air batteries (ZABs) constitute promising next-energy conversion and storage systems due to their low cost, intrinsic safety, and feasibility to fabricate high energy density and stable charge and discharge voltage. Nevertheless, the most significant challenge of rechargeable ZABs is relatively high over potential owing to the sluggish kinetics of oxygen reactions on the air cathode, requiring high-performance noble-metal-free bifunctional electrocatalysts with highly cost-effective. Herein, we developed a facile and scalable coprecipitation strategy to successfully prepare CuO/Co3O4@CNTs catalysts for bifunctional oxygen electrocatalysts. This unique strategy enables CuO/Co3O4nanoparticles to be uniformly grown on CNTs and the simultaneous pyrolysis process results in the generation of ultrafine CuO/Co3O4heterostructures. Contributed to an abundance of heterostructures, the oxygen vacancies and unsaturated chemical bonds in the interface were generated in CuO/Co3O4. Consequently, the CuO/Co3O4@CNTs delivered bifunctional activity of ΔE of 0.78 V and good stability that can maintain 1000 h charge and discharge cycles.