Bendable solid-state supercapacitors with Au nanoparticle-embedded graphene hydrogel films

Kyungwhan Yang, Kyoungah Cho, Dae Sung Yoon, Sangsig Kim

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17 Citations (Scopus)

Abstract

In this study, we fabricate bendable solid-state supercapacitors with Au nanoparticle (NP)-embedded graphene hydrogel (GH) electrodes and investigate the influence of the Au NP embedment on the internal resistance and capacitive performance. Embedding the Au NPs into the GH electrodes results in a decrease of the internal resistance from 35 to 21 â.,▪, and a threefold reduction of the IR drop at a current density of 5 A/g when compared with GH electrodes without Au NPs. The Au NP-embedded GH supercapacitors (NP-GH SCs) exhibit excellent capacitive performances, with large specific capacitance (135 F/g) and high energy density (15.2 W·h/kg). Moreover, the NP-GH SCs exhibit comparable areal capacitance (168 mF/cm 2) and operate under tensile/compressive bending.

Original languageEnglish
Article number40163
JournalScientific Reports
Volume7
DOIs
Publication statusPublished - 2017 Jan 11

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