Abstract：
The performance of zinc-air battery is constrained by the sluggish rate of oxygen electrode reaction, particularly under high current discharge conditions where the kinetic process of the oxygen reduction reaction (ORR) decelerates significantly. To address this challenge, we present a novel phase transition strategy that facilitates the creation of a heteroatom-doped heterointerface (CoN/CoS2). The meticulously engineered CoN/CoS2/NC electrocatalyst displays a superior ORR half-wave potential of 0.87 V and an OER overpotential of 320 mV at 10 mA cm-2. Experimental and computational analysis confirm that the CoN/CoS2 heterostructure optimizes local charge distribution, accelerates electron transfer, and tunes active sites for enhanced catalysis. Notably, this heterojunction improves stability by resisting corrosion and degradation under harsh alkaline conditions, thus demonstrating superior performance and longevity in a custom-made liquid zinc-air battery. This research provides valuable practical and theoretical foundations for designing efficient heterointerfaces in electrocatalysis applications.
摘要：
锌空气电池的性能受到氧电极反应速率缓慢的制约,特别是在氧还原反应(ORR)的动力学过程显著减速的高电流放电条件下。为了应对这一挑战，我们提出了一种新颖的相变策略，该策略有助于创建杂原子掺杂的异质界面（CoN/CoS2）。精心设计的CoN/CoS2/NC电催化剂在10mAcm-2时显示出0.87V的ORR半波电位和320mV的OER超电位。实验和计算分析证实，CoN/CoS2异质结构优化了局部电荷分布，加速电子转移，并调整活性位点以增强催化作用。值得注意的是,这种异质结通过在恶劣的碱性条件下抵抗腐蚀和降解来提高稳定性，因此，在定制的液体锌空气电池中表现出卓越的性能和寿命。这项研究为电催化应用中设计有效的异质界面提供了有价值的实践和理论基础。
