The Capacitive Property Enhancement of CoFeP-Ni(OH)<sub>2</sub>/Nickel Foam Electrodes via an Interfacial Integration Strategy for Asymmetric Supercapacitors
We report the fabrication of CoFeP-Ni(OH)<sub>2</sub>/nickel foam (NF) composite electrodes via a two-step strategy involving the hydrothermal synthesis of Ni(OH)<sub>2</sub> on nickel foam followed by the electrochemical deposition of CoFeP. The integration of the Ni(OH)<...
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MDPI AG
2025-07-01
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| author | Meiying Cui Meiying Pei Seok Kim |
| author_facet | Meiying Cui Meiying Pei Seok Kim |
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| description | We report the fabrication of CoFeP-Ni(OH)<sub>2</sub>/nickel foam (NF) composite electrodes via a two-step strategy involving the hydrothermal synthesis of Ni(OH)<sub>2</sub> on nickel foam followed by the electrochemical deposition of CoFeP. The integration of the Ni(OH)<sub>2</sub> interlayer not only provides a structurally robust interface but also facilitates synergistic redox activity, thereby significantly boosting the pseudocapacitive behavior of the electrode. Comparative analysis with bare CoFeP/NF reveals that the presence of the Ni(OH)<sub>2</sub> layer contributes to enhanced charge transfer efficiency and an increased electroactive surface area. Among the samples prepared under varying deposition cycles, the optimized CoFeP-Ni(OH)<sub>2</sub>/NF electrode exhibits a high areal capacitance of 4244 mF cm<sup>−2</sup> at 2 mA cm<sup>−2</sup>. Furthermore, an asymmetric supercapacitor device assembled with CoFeP-Ni(OH)<sub>2</sub>/NF as the positive electrode and activated carbon as the negative electrode delivers a maximum energy density of 0.19 mWh cm<sup>−2</sup> at a power density of 0.37 mW cm<sup>−2</sup> and excellent cycling stability, retaining 72% of its initial capacitance after 5000 cycles at a high current density of 8 mA cm<sup>−2</sup>. |
| format | Article |
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| language | English |
| publishDate | 2025-07-01 |
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| series | Molecules |
| spelling | doaj-art-51a8ab6cc9c04bfe96d60f1fbb6f381b2025-08-20T03:07:58ZengMDPI AGMolecules1420-30492025-07-013014298610.3390/molecules30142986The Capacitive Property Enhancement of CoFeP-Ni(OH)<sub>2</sub>/Nickel Foam Electrodes via an Interfacial Integration Strategy for Asymmetric SupercapacitorsMeiying Cui0Meiying Pei1Seok Kim2School of Chemical Engineering, Pusan National University, Busandaehak-ro 63-2 beon-gil, Geumjeong-gu, Busan 46241, Republic of KoreaSchool of Chemical Engineering, Pusan National University, Busandaehak-ro 63-2 beon-gil, Geumjeong-gu, Busan 46241, Republic of KoreaSchool of Chemical Engineering, Pusan National University, Busandaehak-ro 63-2 beon-gil, Geumjeong-gu, Busan 46241, Republic of KoreaWe report the fabrication of CoFeP-Ni(OH)<sub>2</sub>/nickel foam (NF) composite electrodes via a two-step strategy involving the hydrothermal synthesis of Ni(OH)<sub>2</sub> on nickel foam followed by the electrochemical deposition of CoFeP. The integration of the Ni(OH)<sub>2</sub> interlayer not only provides a structurally robust interface but also facilitates synergistic redox activity, thereby significantly boosting the pseudocapacitive behavior of the electrode. Comparative analysis with bare CoFeP/NF reveals that the presence of the Ni(OH)<sub>2</sub> layer contributes to enhanced charge transfer efficiency and an increased electroactive surface area. Among the samples prepared under varying deposition cycles, the optimized CoFeP-Ni(OH)<sub>2</sub>/NF electrode exhibits a high areal capacitance of 4244 mF cm<sup>−2</sup> at 2 mA cm<sup>−2</sup>. Furthermore, an asymmetric supercapacitor device assembled with CoFeP-Ni(OH)<sub>2</sub>/NF as the positive electrode and activated carbon as the negative electrode delivers a maximum energy density of 0.19 mWh cm<sup>−2</sup> at a power density of 0.37 mW cm<sup>−2</sup> and excellent cycling stability, retaining 72% of its initial capacitance after 5000 cycles at a high current density of 8 mA cm<sup>−2</sup>.https://www.mdpi.com/1420-3049/30/14/2986phosphidetransition metal compoundspseudocapacitorasymmetric supercapacitorselectrodeposition |
| spellingShingle | Meiying Cui Meiying Pei Seok Kim The Capacitive Property Enhancement of CoFeP-Ni(OH)<sub>2</sub>/Nickel Foam Electrodes via an Interfacial Integration Strategy for Asymmetric Supercapacitors Molecules phosphide transition metal compounds pseudocapacitor asymmetric supercapacitors electrodeposition |
| title | The Capacitive Property Enhancement of CoFeP-Ni(OH)<sub>2</sub>/Nickel Foam Electrodes via an Interfacial Integration Strategy for Asymmetric Supercapacitors |
| title_full | The Capacitive Property Enhancement of CoFeP-Ni(OH)<sub>2</sub>/Nickel Foam Electrodes via an Interfacial Integration Strategy for Asymmetric Supercapacitors |
| title_fullStr | The Capacitive Property Enhancement of CoFeP-Ni(OH)<sub>2</sub>/Nickel Foam Electrodes via an Interfacial Integration Strategy for Asymmetric Supercapacitors |
| title_full_unstemmed | The Capacitive Property Enhancement of CoFeP-Ni(OH)<sub>2</sub>/Nickel Foam Electrodes via an Interfacial Integration Strategy for Asymmetric Supercapacitors |
| title_short | The Capacitive Property Enhancement of CoFeP-Ni(OH)<sub>2</sub>/Nickel Foam Electrodes via an Interfacial Integration Strategy for Asymmetric Supercapacitors |
| title_sort | capacitive property enhancement of cofep ni oh sub 2 sub nickel foam electrodes via an interfacial integration strategy for asymmetric supercapacitors |
| topic | phosphide transition metal compounds pseudocapacitor asymmetric supercapacitors electrodeposition |
| url | https://www.mdpi.com/1420-3049/30/14/2986 |
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