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<p>The rising need for sustainable energy storage solutions has spurred research into environmentally friendly materials for supercapacitors. This study explores a sustainable supercapacitor electrode using cellulose nanocrystals (CNC) derived from corn cob waste. CNC extracted through dewaxing, alkali treatment, bleaching, and acid hydrolysis, were combined with polypyrrole (PPy) via in situ oxidative polymerization. The resulting CNC/PPy nanocomposite exhibits enhanced structural stability, porosity, and conductivity. SEM analysis confirmed the porosity of CNC, while XRD revealed the material’s crystallinity index. FTIR analysis identified the chemical bonds within the CNC/PPy composite. Thermal analysis indicated moderate thermal stability, making it suitable for energy storage applications. Electrochemical testing showed the specific capacitance value of 305.45&#xa0;Fg<sup>−1</sup>. The cyclic voltammetry (CV) analysis portrayed the oxidation and reduction peak which exhibit the pseudocapacitance nature. The CNC/PPy composite showed 71.7% capacitive retention even after undergoing 3000 cycles. By utilizing agricultural waste, this study supports waste valorisation and the development of sustainable materials, contributing to green energy technologies. This research underscores the potential of biomass-derived nanomaterials as promising candidates for the next-generation high-performance, eco-friendly supercapacitors.</p>

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Development of cellulose nanocrystal–polypyrrole composite electrode from corn cob for sustainable supercapacitor applications

  • 期刊论文

  • 发表日期：

    2025年10月6日

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  • M. Edward Fazil,
  • P. Alwin Sinthiya,
  • H. Joy Prabu,
  • A. Felix Sahayaraj,
  • I. Johnson,
  • A. Joseph Sagaya Kennedy,
  • B. Sethuraman,
  • J. Salamon

摘要

The rising need for sustainable energy storage solutions has spurred research into environmentally friendly materials for supercapacitors. This study explores a sustainable supercapacitor electrode using cellulose nanocrystals (CNC) derived from corn cob waste. CNC extracted through dewaxing, alkali treatment, bleaching, and acid hydrolysis, were combined with polypyrrole (PPy) via in situ oxidative polymerization. The resulting CNC/PPy nanocomposite exhibits enhanced structural stability, porosity, and conductivity. SEM analysis confirmed the porosity of CNC, while XRD revealed the material’s crystallinity index. FTIR analysis identified the chemical bonds within the CNC/PPy composite. Thermal analysis indicated moderate thermal stability, making it suitable for energy storage applications. Electrochemical testing showed the specific capacitance value of 305.45 Fg−1. The cyclic voltammetry (CV) analysis portrayed the oxidation and reduction peak which exhibit the pseudocapacitance nature. The CNC/PPy composite showed 71.7% capacitive retention even after undergoing 3000 cycles. By utilizing agricultural waste, this study supports waste valorisation and the development of sustainable materials, contributing to green energy technologies. This research underscores the potential of biomass-derived nanomaterials as promising candidates for the next-generation high-performance, eco-friendly supercapacitors.