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<p>Nickel-zinc aqueous batteries have great potential for application in the field of advanced energy storage and conversion due to their environmental-friendliness, high safety, and ideal output voltage (~ 1.75&#xa0;V). Herein, Fe-PBA, NiFe-PBA, and NiCoFe-PBA are synthesized by a facile coprecipitation strategy, and the structure of NiCoFe-PBA is optimized by modulating the doping ratios of Ni<sup>2+</sup> and Co<sup>2+</sup>. Compared with other PBA materials, the unique crystal structure of NiCoFe-PBA-3 provides a stable framework. During the charge and discharge cycles, it provides sufficient channels for the rapid diffusion of zinc ions (Zn<sup>2+</sup>), reduces the ion diffusion resistance, and enhances the reaction kinetics. Specifically, the assembled NiCoFe-PBA-3//Zn battery exhibits the satisfactory performance in aqueous electrolyte: The maximum energy density is 0.23 mWh cm<sup>−2</sup> and the peak power density is 16.56 mW cm<sup>−2</sup>. The presence of multiple metal centers in NiCoFe-PBA leads to an enhanced electronic conductivity. The multiple metal centers in NiCoFe-PBA, which improves its conductivity and thereby increases the overall capacity of the battery. This work provides new ideas for designing PBA materials for high-efficiency electrochemical devices.</p> Graphical abstract <p></p>

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Design of iron-based Prussian blue analogues via transition metal incorporation for aqueous Ni–Zn batteries

  • 期刊论文

  • 发表日期：

    2025年10月24日

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  • Zhaocheng Jiang,
  • Songtao Zhang,
  • Shixian Wang,
  • Ziming Qiu,
  • Hao Lin,
  • Qian Li,
  • Shuai Cao,
  • Yi Xu,
  • Yecan Pi,
  • Huan Pang

摘要

Nickel-zinc aqueous batteries have great potential for application in the field of advanced energy storage and conversion due to their environmental-friendliness, high safety, and ideal output voltage (~ 1.75 V). Herein, Fe-PBA, NiFe-PBA, and NiCoFe-PBA are synthesized by a facile coprecipitation strategy, and the structure of NiCoFe-PBA is optimized by modulating the doping ratios of Ni2+ and Co2+. Compared with other PBA materials, the unique crystal structure of NiCoFe-PBA-3 provides a stable framework. During the charge and discharge cycles, it provides sufficient channels for the rapid diffusion of zinc ions (Zn2+), reduces the ion diffusion resistance, and enhances the reaction kinetics. Specifically, the assembled NiCoFe-PBA-3//Zn battery exhibits the satisfactory performance in aqueous electrolyte: The maximum energy density is 0.23 mWh cm−2 and the peak power density is 16.56 mW cm−2. The presence of multiple metal centers in NiCoFe-PBA leads to an enhanced electronic conductivity. The multiple metal centers in NiCoFe-PBA, which improves its conductivity and thereby increases the overall capacity of the battery. This work provides new ideas for designing PBA materials for high-efficiency electrochemical devices.

Graphical abstract