Fully Biodegradable Microsupercapacitor for Power Storage in Transient Electronics

Geumbee Lee, Seung Kyun Kang, Sang Min Won, Philipp Gutruf, Yu Ra Jeong, Jahyun Koo, Sang Soo Lee, John A. Rogers, Jeong Sook Ha

Research output: Contribution to journalArticle

68 Scopus citations

Abstract

In this work, the authors report materials, fabrication strategies, and applications of biodegradable microsupercapacitors (MSCs) built using water-soluble (i.e., physically transient) metal (W, Fe, and Mo) electrodes, a biopolymer, hydrogel electrolyte (agarose gel), and a biodegradable poly(lactic-co-glycolic acid) substrate, encapsulated with polyanhydride. During repetitive charge/discharge cycles, the electrochemical performance of these unusual MSCs is dramatically enhanced, following from the role of pseudocapacitance that originates from metal-oxide coatings generated by electrochemical corrosion at the interface between the water-soluble metal electrode and the hydrogel electrolyte. Systematic studies reveal the dissolution kinetics/behaviors of each individual component of the MSCs, as well as those of the integrated devices. An encapsulation strategy that involves control over the thickness, chemistry, and molecular weight of the constituent materials provides a versatile means to engineer desired functional lifetimes. Demonstration experiments illustrate potential applications of these biodegradable MSCs as transient sources of power in the operation of light-emitting diodes and as charging capacitors in integrated circuits for wireless power harvesting.

Original languageEnglish (US)
Article number1700157
JournalAdvanced Energy Materials
Volume7
Issue number18
DOIs
StatePublished - Sep 20 2017
Externally publishedYes

Keywords

  • biodegradable materials
  • biodegradable metals
  • flexible energy storage devices
  • microsupercapacitors
  • transient electronics

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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  • Cite this

    Lee, G., Kang, S. K., Won, S. M., Gutruf, P., Jeong, Y. R., Koo, J., Lee, S. S., Rogers, J. A., & Ha, J. S. (2017). Fully Biodegradable Microsupercapacitor for Power Storage in Transient Electronics. Advanced Energy Materials, 7(18), [1700157]. https://doi.org/10.1002/aenm.201700157