Nonprecious bifunctional electrocatalysts with satisfactory cost and high catalytic performance toward oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential to promote the commercialization of metal-air batteries. Herein, 3D honeycombed hierarchical porous N, O-doping carbon (HHPC) is fabricated via a facile and scalable strategy of hard template-activator assisted pyrolysis. The obtained HHPC displays unique macro-meso-microporous framework, N, O-codoped effect and order-disorder hybrid characteristic, providing sufficient space for O₂ and electrolyte transport, abundant defect sites, enhanced electronic conductivity and stability for oxygen conversion reaction. As such, the HHPC exhibits superior bifunctional electrocatalytic activity with a narrow ΔE value of 0.8 V. And a long-term stability and reversibility with a narrow voltage gap increasing of 0.09 V over 1165 cycles (∼388 h) at 10 mA cm^-2 are achieved in the HHPC-based rechargeable Zn-air battery, outperforming most of the state-of-the-art carbon-based Zn-air batteries.

具有令人满意的成本和对氧还原反应（ORR）和氧释放反应（OER）的高催化性能的非贵金属双功能电催化剂对于促进金属空气电池的商业化至关重要。在本文中，通过硬模板活化剂辅助热解的简便，可扩展的策略来制造3D蜂窝状分层多孔N，O掺杂碳（HHPC）。所获得的HHPC显示出独特的宏观-中-微孔构架，N，O-共掺杂效应和有序-无序杂合特性，为O ₂和电解质的运输提供了足够的空间，大量的缺陷位点，增强了电子传导性和氧转化反应的稳定性。这样，HHPC表现出优异的双功能电催化活性，且ΔE较窄基于HHPC的可充电锌空气电池，在1165个周期（〜388小时）内，在10mA cm ^{-2的条件下}可实现长期稳定性和可逆性，并且在1165个循环（〜388 h）内具有0.09 V的窄电压间隙增加大多数最先进的碳基锌空气电池。