The construction of an efficient oxygen reduction reaction and oxygen evolution reaction (ORR/OER) bifunctional electrocatalyst is of great significance but still remains a giant challenge for high-performance metal-air batteries. In this study, uniform FeS/FeC nanoparticles embedded in a porous N,S-dual doped carbon honeycomb-like composite ( FeS/FeC@NS-C-900) have been conveniently fabricated by pyrolysis of a single-crystal , which has a low potential gap Δ of ca. 0.72 V, a competitive power density of 90.9 mW/cm, a specific capacity as high as 750 mAh/g, and excellent cycling stabilities over 865 h (1730 cycles) at 2 mA/cm when applied as a cathode material for rechargeable zinc-air batteries. In addition, the two series-linked Zn-air batteries successfully powered a 2.4 V LED light as a real power source. The efficient ORR/OER bifunctional electrocatalytic activity and long-term durability of the obtained composite might be attributed to the characteristic honeycomb-like porous structure with sufficient accessible active sites, the synergistic effect of FeS and FeC, and the N,S codoped porous carbon, which provides a promising application potential for portable electronic Zn-air battery related devices.
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Article Synopsis
- This text discusses the development of a new bifunctional electrocatalyst, CoO/CoNGDY, which is essential for efficient oxygen reduction and evolution reactions crucial for clean energy technologies like rechargeable metal-air batteries.
- The CoO/CoNGDY catalyst features a unique Janus structure, where CoO serves as the oxygen evolution reaction (OER) catalyst and N-doped graphdiyne (CoNGDY) functions as the oxygen reduction reaction (ORR) catalyst, enhancing both catalytic activity and durability.
- Tests show that batteries using CoO/CoNGDY exhibit impressive performance, including a specific capacity of 746.8 mAh/g and a lifespan exceeding
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