Biologically derived melanin electrodes in aqueous sodium-ion energy storage devices
- 9 December 2013
- journal article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 110 (52), 20912-20917
- https://doi.org/10.1073/pnas.1314345110
Abstract
Biodegradable electronics represents an attractive and emerging paradigm in medical devices by harnessing simultaneous advantages afforded by electronically active systems and obviating issues with chronic implants. Integrating practical energy sources that are compatible with the envisioned operation of transient devices is an unmet challenge for biodegradable electronics. Although high-performance energy storage systems offer a feasible solution, toxic materials and electrolytes present regulatory hurdles for use in temporary medical devices. Aqueous sodium-ion charge storage devices combined with biocompatible electrodes are ideal components to power next-generation biodegradable electronics. Here, we report the use of biologically derived organic electrodes composed of melanin pigments for use in energy storage devices. Melanins of natural (derived from Sepia officinalis) and synthetic origin are evaluated as anode materials in aqueous sodium-ion storage devices. Na(+)-loaded melanin anodes exhibit specific capacities of 30.4 ± 1.6 mAhg(-1). Full cells composed of natural melanin anodes and λ-MnO2 cathodes exhibit an initial potential of 1.03 ± 0.06 V with a maximum specific capacity of 16.1 ± 0.8 mAhg(-1). Natural melanin anodes exhibit higher specific capacities compared with synthetic melanins due to a combination of beneficial chemical, electrical, and physical properties exhibited by the former. Taken together, these results suggest that melanin pigments may serve as a naturally occurring biologically derived charge storage material to power certain types of medical devices.Keywords
This publication has 88 references indexed in Scilit:
- Fast Ionic Diffusion-Enabled Nanoflake Electrode by Spontaneous Electrochemical Pre-Intercalation for High-Performance SupercapacitorScientific Reports, 2013
- Mesoporous nitrogen-rich carbons derived from protein for ultra-high capacity battery anodes and supercapacitorsEnergy & Environmental Science, 2013
- Lithium storage mechanisms in purpurin based organic lithium ion battery electrodesScientific Reports, 2012
- Role of semiconductivity and ion transport in the electrical conduction of melaninProceedings of the National Academy of Sciences, 2012
- Biomaterials‐Based Electronics: Polymers and Interfaces for Biology and MedicineAdvanced Healthcare Materials, 2012
- pH-induced metal-ligand cross-links inspired by mussel yield self-healing polymer networks with near-covalent elastic moduliProceedings of the National Academy of Sciences, 2011
- Organic Thin‐Film Transistors Fabricated on Resorbable Biomaterial SubstratesAdvanced Materials, 2010
- Chemical and Structural Diversity in Eumelanins: Unexplored Bio‐Optoelectronic MaterialsAngewandte Chemie-International Edition, 2009
- Theoretical Models of Eumelanin Protomolecules and their Optical PropertiesBiophysical Journal, 2008
- Current Understanding of the Binding Sites, Capacity, Affinity, and Biological Significance of Metals in MelaninThe Journal of Physical Chemistry B, 2007