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Pyridinic NB pair-doped carbon microspheres with refined hierarchical architectures for rechargeable zinc-air batteries

Author

Listed:
  • Chen, Wenhao
  • Pi, Xinxin
  • Qu, Zhibin
  • Li, Yanhui
  • Li, Jian
  • Li, Zhiyang
  • Du, Qiuju
  • Lai, Xiaoyong
  • Xia, Yanzhi
  • Sun, Fei

Abstract

Refined architectures are of vital importance in determining the electrocatalytic activity of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Herein, pyridinic NB pair doped carbon microspheres (NB-CMS) with hierarchical micropore-mesopore structure are prepared via a SiO2 hard template assisted CO2 activation strategy. The pyridinic NB pair accounts for ≈ 59.9 % of all N species in NB-CMS, accelerating the ORR process with onset potential (0.996 V) and half-wave potential (0.889 V). Meanwhile, the NB-CMS also exhibits high OER performance with overpotential of 384 mV at 10 mA cm−2. The assembled Zinc-air battery exhibits maximum power density of 134 mW cm−2 and long-term charging and discharging stability over 358 h. Density functional theory (DFT) simulations reveal that the pyridinic NB pair exhibits the highest electrocatalytic performance in dual-functional catalysis, owing to the highest charge density and readily accepts electrons from *OOH adsorbate of N active site neighboring B.

Suggested Citation

  • Chen, Wenhao & Pi, Xinxin & Qu, Zhibin & Li, Yanhui & Li, Jian & Li, Zhiyang & Du, Qiuju & Lai, Xiaoyong & Xia, Yanzhi & Sun, Fei, 2025. "Pyridinic NB pair-doped carbon microspheres with refined hierarchical architectures for rechargeable zinc-air batteries," Applied Energy, Elsevier, vol. 377(PA).
    • Handle: RePEc:eee:appene:v:377:y:2025:i:pa:s0306261924018944
    DOI: 10.1016/j.apenergy.2024.124511
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    References listed on IDEAS

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    1. Chee-Tat Toh & Hongji Zhang & Junhao Lin & Alexander S. Mayorov & Yun-Peng Wang & Carlo M. Orofeo & Darim Badur Ferry & Henrik Andersen & Nurbek Kakenov & Zenglong Guo & Irfan Haider Abidi & Hunter Si, 2020. "Synthesis and properties of free-standing monolayer amorphous carbon," Nature, Nature, vol. 577(7789), pages 199-203, January.
    2. Xin Lei & Qingyun Tang & Yongping Zheng & Pinit Kidkhunthod & Xiaolong Zhou & Bifa Ji & Yongbing Tang, 2023. "High-entropy single-atom activated carbon catalysts for sustainable oxygen electrocatalysis," Nature Sustainability, Nature, vol. 6(7), pages 816-826, July.
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