Fabrication of Flexible, Fully Organic, Degradable Energy Storage Devices Using Silk Proteins

ACS Applied Materials & Interfaces
Ramendra K PalVamsi K Yadavalli

Abstract

Flexible and thin-film devices are of great interest in epidermal and implantable bioelectronics. The integration of energy storage and delivery devices such as supercapacitors (SCs) with properties such as flexibility, miniaturization, biocompatibility, and degradability are sought for such systems. Reducing e-waste and using sustainable materials and processes are additional desirable qualities. Herein, a silk protein-based biocompatible and degradable thin-film microSC (μSC) is reported. A protein carrier with the conducting polymer poly(3,4-ethylenedioxythiophene) polystyrene sulfonate and reduced graphene oxide dopant is used as a photopatternable biocomposite ink. Active electrodes are fabricated using photolithography under benign conditions, using only water as the solvent. These electrodes are printed on flexible protein sheets to form degradable, organic devices with a benign agarose-NaCl gel electrolyte. High capacitance, power density, cycling stability over 500 cycles, and the ability to power a light-emitting diode are shown. The device is flexible, can sustain cyclic mechanical stresses over 450 cycles, and retain capacitive properties over several days in liquid. Significantly, the μSCs are cytocompatible and co...Continue Reading

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Citations

Jul 5, 2019·Physical Chemistry Chemical Physics : PCCP·Eudes Eterno Fileti, Guilherme Colherinhas
Oct 30, 2019·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Kun LiYubo Fan
Jul 3, 2020·Materials Today. Bio·S PradhanV K Yadavalli
Sep 11, 2019·ACS Applied Materials & Interfaces·Evan D PatamiaAmanda R Murphy

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