Scholarlink

<p>PPy/CQDs/V₂O₅ (PCV) composite electrodes were synthesized through in situ oxidative polymerization of pyrrole, utilizing FeCl₃ as the oxidizing agent. By systematically adjusting the weight ratio of V₂O₅ while keeping the amounts of PPy and CQD constant, a series of PPy/CQDs/V₂O₅ (PCV) composites was produced. These composites consist of polypyrrole (PPy), polystyrene sulphonic acid (PPS)-activated carbon quantum dots (CQDs), and vanadium pentoxide (V₂O₅). Among these, PCV0.6 (PPy + CQDs (0.4&#xa0;g) + V₂O₅ (0.6&#xa0;g)) exhibited exceptional electrochemical performance, achieving a high specific capacitance of 1128.2&#xa0;F/g at a scan rate of 2 mV/s and retaining 80.1% of its initial capacitance after 10,000 charge-discharge cycles. Furthermore, at a current density of 0.5&#xa0;A/g, the device achieved an impressive energy density of 122.6 Wh/kg with a corresponding power density of 250.1&#xa0;W/kg. Even at a higher current density of 2.5&#xa0;A/g, the device sustained a considerable energy density of 48.8 Wh/kg while delivering a power density of 1252.7&#xa0;W/kg. To demonstrate practical feasibility, an asymmetric supercapacitor device based on PCV0.6 (PPy + CQDs (0.4&#xa0;g) + V₂O₅ (0.6&#xa0;g)) was fabricated. This device successfully powered a 1&#xa0;V light-emitting diode (LED) for approximately 2.48&#xa0;min after a 5-minute charging cycle, underscoring its potential for real-world energy storage 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

Flower-petal shaped sulphonated carbon quantum dots interpolated polypyrrole/vanadium pentoxide flexible triad for advanced asymmetric supercapacitors

  • 期刊论文

  • 发表日期：

    2025年12月3日

查看全文
  • Monika Dhanda

摘要

PPy/CQDs/V₂O₅ (PCV) composite electrodes were synthesized through in situ oxidative polymerization of pyrrole, utilizing FeCl₃ as the oxidizing agent. By systematically adjusting the weight ratio of V₂O₅ while keeping the amounts of PPy and CQD constant, a series of PPy/CQDs/V₂O₅ (PCV) composites was produced. These composites consist of polypyrrole (PPy), polystyrene sulphonic acid (PPS)-activated carbon quantum dots (CQDs), and vanadium pentoxide (V₂O₅). Among these, PCV0.6 (PPy + CQDs (0.4 g) + V₂O₅ (0.6 g)) exhibited exceptional electrochemical performance, achieving a high specific capacitance of 1128.2 F/g at a scan rate of 2 mV/s and retaining 80.1% of its initial capacitance after 10,000 charge-discharge cycles. Furthermore, at a current density of 0.5 A/g, the device achieved an impressive energy density of 122.6 Wh/kg with a corresponding power density of 250.1 W/kg. Even at a higher current density of 2.5 A/g, the device sustained a considerable energy density of 48.8 Wh/kg while delivering a power density of 1252.7 W/kg. To demonstrate practical feasibility, an asymmetric supercapacitor device based on PCV0.6 (PPy + CQDs (0.4 g) + V₂O₅ (0.6 g)) was fabricated. This device successfully powered a 1 V light-emitting diode (LED) for approximately 2.48 min after a 5-minute charging cycle, underscoring its potential for real-world energy storage applications.