Citation: Yuan Jin, Junyuan Song, Chunquan Wu, Guangli Li, Yirong Zhu. P-doped and N-adsorped hollow core-shell Fe₃O₄@carbon composite as an anode material for high-performance sodium/potassium-ion batteries[J]. Chinese Chemical Letters, ;2026, 37(11): 111783. doi: 10.1016/j.cclet.2025.111783 shu

P-doped and N-adsorped hollow core-shell Fe₃O₄@carbon composite as an anode material for high-performance sodium/potassium-ion batteries

Yuan Jin ^a ,
Junyuan Song ^a ,
Chunquan Wu ^a ,
Guangli Li ^{a, *,} ,
Yirong Zhu ^{b, *,}

a.
Hunan Key Laboratory of Biomedical Nanomaterials and Devices, College of Biological and Medical Engineering, Hunan University of Technology, Zhuzhou 412007, China
b.
School of Materials Science and Engineering, Hunan University of Technology, Zhuzhou 412007, China

guangli010@hut.edu.cn

zhuyirong@hut.edu.cn

Received Date: 19 July 2025
Revised Date: 20 August 2025
Accepted Date: 2 September 2025
Available Online: 2 September 2025

Figures(6)

As an anode material for sodium/potassium-ion batteries, Fe₃O₄ possesses advantages such as high theoretical capacity and abundant natural resources. However, its practical application is hindered by poor intrinsic conductivity and significant volume expansion. Herein, the P-doped and N-adsorbed hollow core-shell Fe₃O₄@carbon composite (PNHCS-Fe₃O₄@C) is successfully synthesized for the first time. Benefiting from the synergism of hollow core-shell structure design and N adsorption/P doping co-modification strategy, the PNHCS-Fe₃O₄@C anode achieves significantly enhanced sodium/potassium storage properties. Specifically, the PNHCS-Fe₃O₄@C electrode in sodium-ion batteries exhibits a high specific capacity of 256.7 mAh/g at 10,000 mA/g and splendid cycling stability with nearly 100% capacity retention after 500 cycles at 5000 mA/g. More impressively, the PNHCS-Fe₃O₄@C electrode in potassium-ion batteries delivers a high specific capacity of 116.7 mAh/g at 10,000 mA/g and outstanding cycling stability with approximately 100% capacity retention after 500 cycles at 1000 mA/g. Density functional theory (DFT) calculations confirm that N adsorption/P doping reduces the adsorption energy of Na⁺/K⁺ and accelerates the charge transfer kinetics, thereby significantly improving the electrochemical performance. This innovative synergistic modification strategy provides good guidance for developing high-performance anode materials for sodium/potassium-ion batteries.
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P-doped and N-adsorped hollow core-shell Fe3O4@carbon composite as an anode material for high-performance sodium/potassium-ion batteries

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通讯作者: 陈斌, bchen63@163.com

P-doped and N-adsorped hollow core-shell Fe₃O₄@carbon composite as an anode material for high-performance sodium/potassium-ion batteries