当前位置: X-MOL 学术J. Energy Storage › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
CuO/Co3O4 heterostructures with carbon nanotubes composites as ORR/OER electrocatalysts for Zn-air batteries
Journal of Energy Storage ( IF 8.9 ) Pub Date : 2023-04-26 , DOI: 10.1016/j.est.2023.107485
Xiaoke Zhang , Qianfeng Liu , Zhao Yan , Shimin Liu , Erdong Wang

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/CoO@CNTs catalysts for bifunctional oxygen electrocatalysts. This unique strategy enables CuO/CoO nanoparticles to be uniformly grown on CNTs and the simultaneous pyrolysis process results in the generation of ultrafine CuO/CoO heterostructures. Contributed to an abundance of heterostructures, the oxygen vacancies and unsaturated chemical bonds in the interface were generated in CuO/CoO. Consequently, the CuO/CoO@CNTs delivered bifunctional activity of ΔE of 0.78 V and good stability that can maintain 1000 h charge and discharge cycles.

中文翻译:


CuO/Co3O4 异质结构与碳纳米管复合材料作为锌空气电池 ORR/OER 电催化剂



可充电锌空气电池(ZAB)由于其低成本、本质安全性以及制造高能量密度和稳定的充放电电压的可行性,构成了有前途的下一代能源转换和存储系统。然而,由于空气阴极上氧反应的动力学缓慢,可充电ZAB面临的最重大挑战是相对较高的过电位,需要具有高性价比的高性能、无贵金属双功能电催化剂。在此,我们开发了一种简便且可扩展的共沉淀策略,成功制备了用于双功能氧电催化剂的 CuO/CoO@CNTs 催化剂。这种独特的策略使 CuO/CoO 纳米颗粒能够在 CNT 上均匀生长,同时热解过程导致超细 CuO/CoO 异质结构的生成。 CuO/CoO 中界面上产生了氧空位和不饱和化学键,从而导致了丰富的异质结构。因此,CuO/CoO@CNTs 具有 0.78 V 的双功能活性和良好的稳定性,可以维持 1000 小时的充放电循环。
更新日期:2023-04-26
down
wechat
bug