Dual‐function electrochromic supercapacitor with graphene electrode. (22nd March 2022)

• Record Type: Journal Article
• Authors: Han, Jisu; Jang, Gyu‐Hyeon; Kim, Dae Kyom; Kim, Joo Yeon; Shin, Jin Wook; Hwang, Chi‐Sun; Piao, Yuanzhe; Kim, Tae‐Dong
• Other Names: Bicer Yusuf guestEditor.
• Is Part Of: International journal of energy research. Volume 46:Number 8(2022)
• Page Start: 10822
• Page End: 10832
• Publication Date: 2022-03-22
• Subjects: electrochemical devices -- electrochromic -- energy storage -- graphene electrode -- PEDOT:PSS; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.7882
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: In order to the immense demand for the development of energy‐storage systems, layer‐optimized graphene and chemically modified poly(3, 4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) were utilized as the electrode and electrochemical material, respectively, to fabricate a device that exhibited electrochromic and supercapacitive functions. The electrochemical properties of the device with the graphene electrode were compared with those of a similar device with ITO as the electrode, and a remarkable synergetic effect was observed in the former, likely owing to strong π‐π interactions between graphene and PEDOT:PSS. The colored and bleached transmittances of the device with the graphene electrode were 20.6% and 59.3%, respectively, at a wavelength of 650 nm, which are indicative of its electrochromic behavior. Furthermore, the galvanostatic charge/discharge curves, which are indicative of the electrochemical‐energy‐storage performances, were in good agreement with the clearly visible transmittance change of the device. The device with the graphene electrode exhibited a maximum areal capacitance of 1.08 mF cm −2 at a current density of 0.001 mA cm −2, which was higher than that of the ITO‐based electrode. Our approach for fabricating graphene devices with modified PEDOT:PSS could be helpful in designing dual‐function devices for promising electrochromic energy‐storage platforms. Abstract : Dual‐function electrochromic supercapacitor device is promising for smart energy‐generating WINDOW application.