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Foldable and Biodegradable Energy‐Storage Devices on Copy Papers
Author(s) -
Park MyungJoo,
Lee JangSik
Publication year - 2019
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201800411
Subject(s) - materials science , graphene , energy storage , capacitor , nanotechnology , supercapacitor , electrode , electrolyte , optoelectronics , power density , oxide , carbon nanotube , pencil (optics) , electrochemistry , electrical engineering , power (physics) , voltage , mechanical engineering , chemistry , physics , engineering , quantum mechanics , metallurgy
Flexible and foldable electronic devices require flexible energy‐storage components. Electrochemical capacitors (ECs) could store charges without chemical reaction, have fast charging/discharging speed, and high power density. Carbon‐based materials such as activated carbon, single‐wall carbon nanotubes, and graphene have large ion‐reachable surface area and effective electronic transport passages, which enable capacitive behavior with high power density and energy density. An electric double‐layer capacitor made using pencil‐drawn electrodes on commercial copy papers is reported here. Pencil for electrodes is made with silver nanoparticles (AgNPs) and reduced graphene oxide (rGO) with well‐connected structure. These AgNPs/rGO hybrid structures give high conductivity and reliable charging/discharging properties. The ECs are based on pencil‐drawn electrodes on copy papers and biopolymer electrolytes, so these can realize ultra‐low cost, foldable, and biodegradable energy sources for flexible and foldable electronic devices in the future.