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<p>Supercapacitors have achieved rapid development in the energy storage field with advantages such as high power density, fast charge-discharge rate, eco-friendliness, and low cost. This paper studied the preparation of CC/NiFeP@NiFeN composite electrode material and its supercapacitor performance. CC/NiFeP@NiFeN composite electrode was prepared via in-situ phosphonitridation of CC/NiFe-LDH precursor by designing a heterogeneous interface. This electrode integrates the synergistic effect of stable and open structure as well as component interconnection, which accelerates the redox reaction kinetics and thus exhibits excellent electrochemical performance. The specific capacitance of the CC/NiFeP@NiFeN electrode was 526&#xa0;F·g⁻¹ at a current density of 1&#xa0;A·g⁻¹. An NiFeP@NiFeN//AC asymmetric supercapacitor was assembled using the CC/NiFeP@NiFeN electrode as the positive electrode and the AC electrode as the negative electrode. This supercapacitor exhibited a power density of 985.97&#xa0;W·kg⁻¹ at an energy density of 44.91 Wh·kg⁻¹; even at a lower energy density of 32.66 Wh·kg⁻¹, it still maintained a high power density of 1.68&#xa0;kW·kg⁻¹. After 5000 charge-discharge cycles, the capacitance retention rate of the device reached 98.4%.</p>

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Preparation of CC/NiFeP@NiFeN composite material and its study on capacitive performance

  • 期刊论文

  • 发表日期：

    2025年11月25日

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  • Zhiyu Ma,
  • Fengning Jin,
  • Zixuan Liu,
  • Yinghuan Fu,
  • Guowen Wang,
  • Xinxin Zhang,
  • Hongchao Ma

摘要

Supercapacitors have achieved rapid development in the energy storage field with advantages such as high power density, fast charge-discharge rate, eco-friendliness, and low cost. This paper studied the preparation of CC/NiFeP@NiFeN composite electrode material and its supercapacitor performance. CC/NiFeP@NiFeN composite electrode was prepared via in-situ phosphonitridation of CC/NiFe-LDH precursor by designing a heterogeneous interface. This electrode integrates the synergistic effect of stable and open structure as well as component interconnection, which accelerates the redox reaction kinetics and thus exhibits excellent electrochemical performance. The specific capacitance of the CC/NiFeP@NiFeN electrode was 526 F·g⁻¹ at a current density of 1 A·g⁻¹. An NiFeP@NiFeN//AC asymmetric supercapacitor was assembled using the CC/NiFeP@NiFeN electrode as the positive electrode and the AC electrode as the negative electrode. This supercapacitor exhibited a power density of 985.97 W·kg⁻¹ at an energy density of 44.91 Wh·kg⁻¹; even at a lower energy density of 32.66 Wh·kg⁻¹, it still maintained a high power density of 1.68 kW·kg⁻¹. After 5000 charge-discharge cycles, the capacitance retention rate of the device reached 98.4%.