High-Performance Li+-Doped Polyaniline/Soybean Fiber Composite Films: A Promising Electrode Material for Solid-State Supercapacitors

Abdulwadood A., KALKAN ERDOĞAN M., AYDOĞDU TIĞ G., KARAKIŞLA M.

ACS Applied Energy Materials, cilt.7, sa.22, ss.10614-10625, 2024 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 7 Sayı: 22
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1021/acsaem.4c02216
  • Dergi Adı: ACS Applied Energy Materials
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex
  • Sayfa Sayıları: ss.10614-10625
  • Anahtar Kelimeler: flexible green composite film, LiNO3, polyaniline, soybean protein fiber, supercapacitor
  • Ankara Üniversitesi Adresli: Evet

Özet

In this study, we developed a flexible, recyclable, and adhesive conductive composite film, which shows promise as an alternative material for supercapacitor electrodes. The film was produced by using commercially available soybean protein-containing textile fibers (SPF) derived from soybean powder. The biocompatibility and multifunctionality of the film make it suitable for applications in electronics, biomedical devices, tissue engineering, drug delivery, and energy storage. To achieve this goal, lithium nitrate (LiNO3) was incorporated into a viscous solid-liquid mixture of SPF dissolved in formic acid (FA) and 1.0 M H2SO4. Aniline was then polymerized in situ as polyaniline (PAn) within this mixture using ammonium persulfate (APS), resulting in an SPF-Li+/PAn electrolyte with a heterogeneous liquid-solid composition. Additionally, a similar mixture with a composition of SPF/PAn-Li+ was also prepared by polymerizing aniline in the SPF solution and then adding LiNO3. The electrical conductivities of the composite films, prepared by casting the SPF-Li+, SPF-Li+/PAn, SPF/PAn, and SPF/PAn-Li+ mixtures onto a plastic surface, varied across the (2.1-4.3) × 10-5 S cm-1 range. Structural, morphological, and surface properties were characterized by using ATR-FTIR, SEM, and water contact angle measurements, respectively. The composite film, containing Li+ ions, PAn, and SPF, exhibited good adhesion and high electrochemical stability when coated onto a glassy carbon electrode (GCE) in an aqueous medium. Supercapacitive properties of SPF-Li+, SPF-Li+/PAn, SPF/PAn, and SPF/PAn-Li+ coated GCEs were investigated via cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge-discharge (GCD) measurements in a 0.5 M H2SO4 solution. The obtained results revealed good capacitive behavior with a long-term life cycle, suggesting the potential of the films as a viable alternative for supercapacitor electrodes.