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<p>Due to the exceptional ORR catalytic activity and stability, cobalt and nitrogen-doped carbon (Co–N–C) catalysts are regarded as highly promising candidates for cathode catalysts in zinc–air batteries. However, it remains a challenge to expose more stable and more efficient active sites. Therefore, this work focuses on the design and preparation of Co–N–C catalysts with a robust and porous structure. The results revealed that the robust and porous structure could be easily achieved by the template (SiO<sub>2</sub>)-assisted hydrothermal method. Moreover, the Co-900-50 catalyst has the highest half-wave potential, and the Co-900-100 catalyst has the highest limiting current density. Both individuals are chosen for further examination regarding their potential use in zinc–air batteries. The battery with Co-900-100 catalyst demonstrated exceptional stability across the current densities (5–20&#xa0;mA cm<sup>− 2</sup>). Specifically, the voltage rose by 0.04&#xa0;V following a 100&#xa0;h discharge at a rate of 5&#xa0;mA cm<sup>− 2</sup>, while the discharge voltage remained nearly constant at 1.24&#xa0;V throughout 300 charge/discharge cycles at 5&#xa0;mA cm<sup>− 2</sup>.</p>

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Synthesis of the porous Co–N-doped carbon catalysts as a durable cathode for zinc–air battery

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月28日

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  • Fu Niu,
  • Jia-Ang Liu,
  • Lin-Ting Zhao,
  • Yi Qiao,
  • Rui-Xia Chu,
  • Fang-Yuan Qiu,
  • Wan-You Huang

摘要

Due to the exceptional ORR catalytic activity and stability, cobalt and nitrogen-doped carbon (Co–N–C) catalysts are regarded as highly promising candidates for cathode catalysts in zinc–air batteries. However, it remains a challenge to expose more stable and more efficient active sites. Therefore, this work focuses on the design and preparation of Co–N–C catalysts with a robust and porous structure. The results revealed that the robust and porous structure could be easily achieved by the template (SiO2)-assisted hydrothermal method. Moreover, the Co-900-50 catalyst has the highest half-wave potential, and the Co-900-100 catalyst has the highest limiting current density. Both individuals are chosen for further examination regarding their potential use in zinc–air batteries. The battery with Co-900-100 catalyst demonstrated exceptional stability across the current densities (5–20 mA cm− 2). Specifically, the voltage rose by 0.04 V following a 100 h discharge at a rate of 5 mA cm− 2, while the discharge voltage remained nearly constant at 1.24 V throughout 300 charge/discharge cycles at 5 mA cm− 2.