Scholarlink

<p>The development of high-performance bifunctional electrocatalysts is crucial for advancing zinc-air batteries. However, the fundamentally distinct mechanisms of the oxygen reduction and evolution reactions (ORR/OER) hinder the simultaneous realization of high activity within a single catalyst. Herein, we propose a spatial decoupling strategy to overcome this limitation by engineering isolated Fe single-atoms and Fe–Ir dual-atom pairs on a nitrogen-doped carbon matrix (Fe/FeIr-NC). In this architecture, Fe single atoms serve as ORR centers, while Fe–Ir pairs with tunable spacing are tailored for OER, enabling complete functional separation and independent optimization of the reactions. As a result, the catalyst delivers an ORR half-wave potential of 0.91 V and an OER overpotential of 250 mV at 10 mA cm<sup>−2</sup>, yielding a record-low bifunctional gap (Δ<i>E</i> = 0.57 V) that outperforms all reported single- and dual-atom catalysts. A flexible fiber zinc-air battery was developed based on this catalyst, delivering a peak power density of 3920 W kg<sup>−1</sup>, along with a 1.4-fold increase in energy efficiency and a 2.6-fold extension in cycle life compared to the commercial Pt/C + IrO<sub>2</sub> benchmark. This work not only breaks the traditional activity trade-off in bi-functional catalysis but also offers a promising route toward high-performance power sources for wearable electronics.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Spatially decoupled single/dual-atomic sites with independent bifunctional activity for high-performance fiber zinc-air batteries

  • 期刊论文

  • 发表日期：

    2026年1月23日

查看全文
  • Jing Zhou,
  • Yumin Chen,
  • Wei Mao,
  • Long Jiang,
  • Huangjian Chen,
  • Yunzhan Ying,
  • Yulong Wan,
  • Shifan Zheng,
  • Ju Lin,
  • Shikun Liang,
  • Yuyuan Yao,
  • Bingjie Wang,
  • Ye Zhang,
  • Lihua Gan,
  • Huisheng Peng,
  • Lie Wang

摘要

The development of high-performance bifunctional electrocatalysts is crucial for advancing zinc-air batteries. However, the fundamentally distinct mechanisms of the oxygen reduction and evolution reactions (ORR/OER) hinder the simultaneous realization of high activity within a single catalyst. Herein, we propose a spatial decoupling strategy to overcome this limitation by engineering isolated Fe single-atoms and Fe–Ir dual-atom pairs on a nitrogen-doped carbon matrix (Fe/FeIr-NC). In this architecture, Fe single atoms serve as ORR centers, while Fe–Ir pairs with tunable spacing are tailored for OER, enabling complete functional separation and independent optimization of the reactions. As a result, the catalyst delivers an ORR half-wave potential of 0.91 V and an OER overpotential of 250 mV at 10 mA cm−2, yielding a record-low bifunctional gap (ΔE = 0.57 V) that outperforms all reported single- and dual-atom catalysts. A flexible fiber zinc-air battery was developed based on this catalyst, delivering a peak power density of 3920 W kg−1, along with a 1.4-fold increase in energy efficiency and a 2.6-fold extension in cycle life compared to the commercial Pt/C + IrO2 benchmark. This work not only breaks the traditional activity trade-off in bi-functional catalysis but also offers a promising route toward high-performance power sources for wearable electronics.