Scholarlink

<p>The development of electrode materials capable of simultaneously delivering high capacitance, rapid charge-discharge capability, and long cycle life remains a key challenge in advanced supercapacitor technologies. In this study, ternary FeVO₄-Co₃V₂O₈ composite electrodes were rationally designed by systematically optimizing the Fe: Co precursor molar ratio within the composite system, followed by surface modification with the conductive polymer polyaniline (PANI) to enhance interfacial charge transfer. The composite electrodes were directly grown on nickel foam (NF) substrates without the use of binders and evaluated in a three-electrode configuration using a 3&#xa0;M KOH aqueous electrolyte. Among the investigated compositions, the equimolar 1Fe:1Co:1&#xa0;V electrode exhibited the highest electrochemical performance, achieving an areal specific capacitance of 1.70&#xa0;F cm⁻² at a current density of 1&#xa0;mA cm⁻². After PANI modification, the surface capacitance increased to 2.18&#xa0;F cm⁻², the discharge time was extended by approximately 28%, and the electrode retained 73.94% of its initial capacitance after 10,000 charge-discharge cycles. This enhanced performance can be attributed to the synergistic redox activity of Fe³⁺, Co²⁺, and V⁵⁺ ions within the ternary oxide structure, together with improved electron transport and accelerated charge-transfer kinetics provided by the conductive PANI interfacial layer. These findings indicate that FeVO₄Co₃V₂O₈/PANI hybrid electrodes are promising candidates for high-performance supercapacitor applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Enhanced electrochemical performance of nanostructured FeVO4-Co3V2O8/PANI composite electrodes for supercapacitor applications

  • 期刊论文

  • 发表日期：

    2026年7月1日

查看全文
  • Süleyman Kerli,
  • Nuran Çelikçi,
  • M. Enes Balkan,
  • Ali Kemal Soğuksu,
  • Samet Topal,
  • Sümran Bilgin,
  • Ümit Alver

摘要

The development of electrode materials capable of simultaneously delivering high capacitance, rapid charge-discharge capability, and long cycle life remains a key challenge in advanced supercapacitor technologies. In this study, ternary FeVO₄-Co₃V₂O₈ composite electrodes were rationally designed by systematically optimizing the Fe: Co precursor molar ratio within the composite system, followed by surface modification with the conductive polymer polyaniline (PANI) to enhance interfacial charge transfer. The composite electrodes were directly grown on nickel foam (NF) substrates without the use of binders and evaluated in a three-electrode configuration using a 3 M KOH aqueous electrolyte. Among the investigated compositions, the equimolar 1Fe:1Co:1 V electrode exhibited the highest electrochemical performance, achieving an areal specific capacitance of 1.70 F cm⁻² at a current density of 1 mA cm⁻². After PANI modification, the surface capacitance increased to 2.18 F cm⁻², the discharge time was extended by approximately 28%, and the electrode retained 73.94% of its initial capacitance after 10,000 charge-discharge cycles. This enhanced performance can be attributed to the synergistic redox activity of Fe³⁺, Co²⁺, and V⁵⁺ ions within the ternary oxide structure, together with improved electron transport and accelerated charge-transfer kinetics provided by the conductive PANI interfacial layer. These findings indicate that FeVO₄Co₃V₂O₈/PANI hybrid electrodes are promising candidates for high-performance supercapacitor applications.