@article{Mao2023, 
author = {Huimin Mao and Xiaobin Liu and Siqi Wu and Yixin Fu and Guishan Liu and Guizhong Zhou and Lei Wang},
title = {WC/Co7Fe3 heterojunction embedded in N,P co-doped hierarchical carbon enables rechargeable/flexible Zn-air battery},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {2},
pages = {2519-2527},
keywords = {heterojunction, Zn-air battery, hierarchical structure, bifunctional oxygen electrocatalyst},
url = {https://www.sciopen.com/article/10.1007/s12274-022-5059-y},
doi = {10.1007/s12274-022-5059-y},
abstract = {Rational design and synthesis of bifunctional oxygen electrocatalysts with high activity and stability are key challenges in the development of rechargeable Zn-air batteries (ZABs). In this paper, tungsten carbide (WC) and Co7Fe3 embedded in N,P co-doped hierarchical carbon (WC/Co7Fe3-NPHC) was prepared by using zeolite imidazolate frameworks as precursor. Density functional theory demonstrates that the mutual adjustment among the WC, Co7Fe3, and N,P co-doped carbon at the three-phase heterojunction interface makes the catalyst possess moderate adsorption strength, and greatly improves the conductivity and electron transfer rate of the catalyst. As a result, the WC/Co7Fe3-NPHC exhibits a low overall oxygen redox potential difference of 0.72 V, while the ZAB assembled by WC/Co7Fe3-NPHC as an air cathode exhibits ultra-long cycle stability of over 550 h. Futhermore, WC/Co7Fe3-NPHC can keep good charge and discharge stability at different bending angles when applied to flexible solid ZAB.}
}