Solid-State Electrochemical Energy Storage Based on Soluble Melanin

Biocompatible and biodegradable powering materials are appealing systems for biomedical and electronic devices. Melanin is a natural and multifunctional material with redox capability, which is of great interest in electrochemical energy storage functionalities. In our work, we explored the use of s...

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Bibliographic Details
Published in:Electrochem (Basel, Switzerland) Switzerland), 2021-06, Vol.2 (2), p.264-273
Main Authors: Paulin, João V., Fernandes, Silvia L., Graeff, Carlos F. O.
Format: Article
Language:English
Subjects:
Biocompatibility
Biodegradability
Biomedical materials
Electrodes
Electrolytes
Electronic devices
Energy storage
eumelanin
Illumination
Melanin
melanin derivatives
Morphology
Polymerization
Polyvinyl alcohol
Solid state
Spectrum analysis
supercapacitor
Voltammetry
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Summary:Biocompatible and biodegradable powering materials are appealing systems for biomedical and electronic devices. Melanin is a natural and multifunctional material with redox capability, which is of great interest in electrochemical energy storage functionalities. In our work, we explored the use of soluble melanin derivatives as active materials for symmetric solid-state supercapacitors operating in the dark and under illumination. We observed that our devices were photo-pseudocapacitive. Additionally, under illumination, our best device showed a specific capacitance of 57.7 mFg−1 at a scan rate of 0.01 Vs−1, with a decrease of 53% in resistance compared to that in the dark. Our outcome suggests that soluble melanin is a promising material for solid-state powering elements in wearable and environmentally friendly devices.
ISSN:2673-3293
2673-3293
DOI:10.3390/electrochem2020019