Naslov
Electrochemical synthesis of graphene paper for supercapacitor application

Autori
Kranjče, Roko ; Mesaroš, Nicole ; Mikić, Dajana ; Kralj, Magdalena ; Kraljić Roković, Marijana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
71st Annual Meeting of the International Society of Electrochemistry : Book of abstracts / - , 2020, 1150-1150

Skup
71st Annual Meeting of the International Society of Electrochemistry

Mjesto i datum
Beograd, Srbija; online, 30.08.2020. - 04.09.2020

Vrsta sudjelovanja
Poster

Vrsta recenzije
Recenziran

Ključne riječi
graphene ; graphene oxide ; graphene paper ; supercapacitors

Sažetak
Graphene is a two dimensional material characterised by a honeycomb structure and sp2 hybridization that provides outstanding properties of this material. It can be prepared as a powder or as a porous monolithic structure (hydrogel or graphene paper). Graphene paper is characterized by high surface area, low weight, high electrical conductivity and furthermore it is a flexible and free-standing material, which makes it a perfect candidate for energy storage applications. The objective of this research was electrochemical synthesis of graphene paper (ErGO) and its application in the flexible supercapacitor as freestanding active material. In order to obtain ErGO, graphene oxide (GO) paper was prepared by vacuum filtration or drop-casting while electrochemical reduction of GO paper was carried out by chromoamperometry method. During the reduction process GO paper was connected as working electrode by pressing a titanium road onto the paper. By using a number of techniques, including Fouirer-transformed infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction analysis (XRD) and conductivity measurement, it was shown that the reduction process was carried out successfully. The obtained ErGO papers were used for assembling supercapacitors with nickel current collector or supercapacitor with freestanding flexibile ErGO paper. The prepared supercapacitors were tested by cycling voltammetry and electrochemical impedance spectroscopy methods. The obtained results indicated good reversibility with specific capacitance of 44 F g-1

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

POVEZANOST RADA