title: Laminated ultrathin chemical vapor deposition graphene films based stretchable and transparent high-rate supercapacitor.
abstract: Due to their exceptional flexibility and transparency, CVD graphene films have been regarded as an ideal replacement of indium tin oxide for transparent electrodes, especially in applications where electronic devices may be subjected to large tensile strain. However, the search for a desirable combination of stretchability and electrochemical performance of such devices remains a huge challenge. Here, we demonstrate the implementation of a laminated ultrathin CVD graphene film as a stretchable and transparent electrode for supercapacitors. Transferred and buckled on PDMS substrates by a prestraininig-then-buckling strategy, the four-layer graphene film maintained its outstanding quality, as evidenced by Raman spectra. Optical transmittance of up to 72.9% at a wavelength of 550 nm and stretchability of 40% were achieved. As the tensile strain increased up to 40%, the specific capacitance showed no degradation and even increased slightly. Furthermore, the supercapacitor demonstrated excellent frequency capability with small time constants under stretching.
authors.affiliation: College of Textiles, Donghua University , Shanghai 201620, People's Republic of China.
authors.forename: Ping
authors.initials: P
authors.lastname: Xu
authors.forename: Junmo
authors.initials: J
authors.lastname: Kang
authors.forename: Jae-Boong
authors.initials: JB
authors.lastname: Choi
authors.forename: Jonghwan
authors.initials: J
authors.lastname: Suhr
authors.forename: Jianyong
authors.initials: J
authors.lastname: Yu
authors.forename: Faxue
authors.initials: F
authors.lastname: Li
authors.forename: Joon-Hyung
authors.initials: JH
authors.lastname: Byun
authors.forename: Byung-Sun
authors.initials: BS
authors.lastname: Kim
authors.forename: Tsu-Wei
authors.initials: TW
authors.lastname: Chou
keywords: chemical vapor deposition; graphene films; high rate capability; stretchability; supercapacitors; transparency