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Polypyrrole-Stabilized Polypeptide for Eco-Friendly Supercapacitors.

Zhe Li1, Kuan Hu2, Zhou Li3

  • 1School of Medical Technology, Institute of Engineering Medicine, Beijing Institute of Technology, Beijing 100081, China.

International Journal of Molecular Sciences
|February 11, 2023
PubMed
Summary
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Environmentally friendly supercapacitors (SCs) were developed using polypyrrole (PPy)-stabilized polypeptide (FF). These fully degradable SCs offer high performance and biocompatibility, addressing electronic waste and implantable device challenges.

Area of Science:

  • Materials Science
  • Electrochemistry
  • Biomedical Engineering

Background:

  • Supercapacitors (SCs) are vital energy storage devices but contribute to electronic waste.
  • Developing biodegradable yet stable electronics, especially for implants, remains a significant challenge.

Purpose of the Study:

  • To demonstrate environmentally friendly, fully degradable supercapacitors (SCs).
  • To address the need for compatible stability and biodegradability in implantable electronics.

Main Methods:

  • Fabrication of a layer-by-layer SC structure using polylactic acid/chitosan (PLA-C) supports, magnesium (Mg) current collectors, and polypyrrole (PPy)-stabilized polypeptide (FF) composite layers.
  • Incorporation of a polyvinyl alcohol/phosphate buffer solution (PVA/PBS) hydrogel electrolyte.
Keywords:
degradableeco-friendlypeptidepyrrolesupercapacitor

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  • Testing of device performance, including capacitance retention over 5000 cycles and stability in a liquid environment.
  • In vitro degradation studies to assess biodegradability.

    • Main Results:

    • The developed SCs exhibit light weight, thinness, flexibility, and biocompatibility.
    • Capacitance retention remained high at 94.7% after 5000 cycles in air.
    • The device demonstrated stable operation for 7 days in a liquid environment.
    • Complete in vitro degradation occurred within 90 days without adverse environmental effects.

    Conclusions:

    • The study successfully demonstrated fully degradable, eco-friendly supercapacitors based on PPy-stabilized polypeptide.
    • These devices offer a promising solution for reducing electronic waste and advancing implantable biomedical electronics.
    • The combination of high performance, biodegradability, and biocompatibility marks a significant step towards sustainable electronic systems.