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The increasing demand for energy, coupled with the continuing deterioration of the environment, has heightened people's desire for renewable energy storage technologies, such as rechargeable zinc‐air batteries (ZABs). However, the race for the developing ZABs usually focuses on the search for new materials, with less emphasis on electrode engineering and recycling. Herein, for the first time, a simple, scalable, and inexpensive electrode engineering and recycling strategy for ZABs is proposed based on the magnetic binder engineering of the cobalt‐implanted electrocatalysts. By manipulating the electrode with magnets, the ZAB can cycle for 1200 h (7200 cycles), and its anti‐pulverization behavior is revealed through in situ observation of a visual cell with an air electrode in the charged state. Moreover, the cobalt‐implanted electrocatalysts can be recycled from the spent ZABs using a magnetic force‐separation method. Additionally, the ZAB with the recycled electrocatalyst exhibits considerably prolonged cycling stability for over 500 h (ΔE = 0.86 V). This study not only enables the design of magnetic force‐engineered electrodes with improved battery performance but also provides sustainable solutions for recycling electrocatalysts for many possible applications beyond ZABs. [ABSTRACT FROM AUTHOR]

The self‐catalyzed growth of nanostructures on material surfaces is one of the most time‐ and cost‐effective ways to design multifunctional catalysts for a wide range of applications. Herein, the use of this technique to develop a multicomponent composite catalyst with CoSx core encapsulated in an ultrathin porous carbon shell entangled with Co, N‐codoped carbon nanotubes is reported. The as‐prepared catalyst has a superior catalytic activity for oxygen evolution and oxygen reduction reactions, an ultralow potential gap of 0.74 V, and outstanding durability, surpassing most previous reports. Such superiority is ascribed, in part, to the unique 3D electrode architecture of the composite, which is favorable for transporting oxygen species and electrons and creates a synergy between the components with different functionalities. Moreover, the flexible solid Zn–air battery assembled with such an air electrode shows a steady discharge voltage plateau of 1.25 V and a round‐trip efficiency of 70% at 1 mA cm−2. This work presents a simple strategy to design highly efficient bifunctional oxygen electrocatalysts and may pave the way for the practical application of these materials in many energy conversion/storage devices. [ABSTRACT FROM AUTHOR]