Wang Jiangbo, Zhang Yanan, Liao Shiqin, Chen Dongsheng, Mensah Alfred, Wei Qufu
Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Jiangsu Province, Wuxi, 214122, PR China.
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, and Laboratory of Advanced Materials, Fudan University, Shanghai, 200438, PR China.
ChemSusChem. 2024 Jun 10;17(11):e202301510. doi: 10.1002/cssc.202301510. Epub 2024 Feb 12.
The flexible air electrode with high oxygen electrocatalytic performance and outstanding stability under various deformations plays a vital role in high-performance flexible Zn-air batteries (ZABs). Herein, a self-supported Mo, N, and P co-doped carbon cloth (CC) denoted as MoNP@CC with bark-like surface structure is fabricated by a facile two-step approach via a one-pot method and pyrolysis. The surface of the electrode shows a nanoscale "rift valley" and uniformly distributed active sites. Taking advantage of the nano-surface as well as transition metal and heteroatom doping, the self-supported electrocatalysis air electrode exhibits considerable oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) performance in terms of low overpotential (388 mV at 10 mA cm) for OER and a much positive potential (0.74 V) at 1.0 mA cm for ORR. Furthermore, MoNP@CC is further used for the flexible ZAB to demonstrate its practical application. The MoNP@CC-based ZAB displays a good cycling performance for 2800 min and an open-circuit voltage of 1.44 V. This work provides a new approach to the construction of a high-performance, self-supported electrocatalysis electrode used for a flexible energy storage device.
具有高氧电催化性能且在各种变形下具有出色稳定性的柔性空气电极，在高性能柔性锌空气电池（ZABs）中起着至关重要的作用。在此，通过一锅法和热解的简便两步法制备了一种具有树皮状表面结构的自支撑Mo、N和P共掺杂碳布（CC），记为MoNP@CC。电极表面呈现出纳米级的“裂谷”和均匀分布的活性位点。利用纳米表面以及过渡金属和杂原子掺杂，自支撑电催化空气电极在析氧反应（OER）方面表现出相当可观的性能，在10 mA cm时过电位低（388 mV），在氧还原反应（ORR）方面，在1.0 mA cm时具有更正的电位（0.74 V）。此外，MoNP@CC进一步用于柔性ZAB以展示其实际应用。基于MoNP@CC的ZAB显示出2800分钟的良好循环性能和1.44 V的开路电压。这项工作为构建用于柔性储能装置的高性能自支撑电催化电极提供了一种新方法。
