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<p>The development of high-performance and cost-efficient catalysts holds great significance in facilitating oxygen reduction reaction (ORR), which is a pivotal process in next-generation energy storage devices, such as aluminum–air batteries. Transition metal sulfides have been proposed as promising non-noble metal ORR catalysts. However, achieving platinum (Pt)-comparable activity remains a challenge. Herein, a Co-doping-triggered electronic reconfiguration strategy is reported to tune the charge distribution and coordination state of ZnS nanoparticles anchored on N, S co-doped carbon (ZnS/NSC), thereby optimizing the intermediate adsorption kinetics and promoting ORR activity. The half-wave potential of 0.87&#xa0;V as well as 100-h continuous durability are obtained by Co-doped ZnS/NSC in alkaline media. In addition, the solid-state aluminum–air battery is further assembled by using Co-doped ZnS/NSC as a cathode catalyst, achieving a maximum peak density of 100 mW·cm<sup>−2</sup> and discharge duration over 55&#xa0;h. Density functional theory (DFT) calculations reveal that high electronegative Co-doping is beneficial for the construct of charge-transfer avenue and optimization of intermediate adsorption procedure. This study presents an efficient approach for preparing metal sulfides with high catalytic activity toward ORR in flexible metal–air batteries.</p> Graphical abstract <p></p>

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Co-doping-induced electronic reconfiguration of nanosized ZnS for facilitating oxygen reduction reaction in flexible aluminum–air batteries

  • 期刊论文

  • 发表日期：

    2025年1月9日

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  • Yue Xu,
  • Jun-Yuan Tang,
  • Shuai-Dong Li,
  • Hao-Lin Hu,
  • Ying-Jian He,
  • Shao-Feng Wang,
  • Zhao-Meng Wu,
  • Samuel Jeong,
  • Ze-Yun Cai,
  • Xi Lin,
  • Kai-Long Hu

摘要

The development of high-performance and cost-efficient catalysts holds great significance in facilitating oxygen reduction reaction (ORR), which is a pivotal process in next-generation energy storage devices, such as aluminum–air batteries. Transition metal sulfides have been proposed as promising non-noble metal ORR catalysts. However, achieving platinum (Pt)-comparable activity remains a challenge. Herein, a Co-doping-triggered electronic reconfiguration strategy is reported to tune the charge distribution and coordination state of ZnS nanoparticles anchored on N, S co-doped carbon (ZnS/NSC), thereby optimizing the intermediate adsorption kinetics and promoting ORR activity. The half-wave potential of 0.87 V as well as 100-h continuous durability are obtained by Co-doped ZnS/NSC in alkaline media. In addition, the solid-state aluminum–air battery is further assembled by using Co-doped ZnS/NSC as a cathode catalyst, achieving a maximum peak density of 100 mW·cm−2 and discharge duration over 55 h. Density functional theory (DFT) calculations reveal that high electronegative Co-doping is beneficial for the construct of charge-transfer avenue and optimization of intermediate adsorption procedure. This study presents an efficient approach for preparing metal sulfides with high catalytic activity toward ORR in flexible metal–air batteries.

Graphical abstract