A Structural Supercapacitor Based on Graphene and Hardened Cement Paste. Issue 3 (29th December 2015)

• Record Type: Journal Article
• Authors: Zhang, Junjun; Xu, Jiaming; Zhang, Dong
• Is Part Of: Journal of the Electrochemical Society. Volume 163:Issue 3(2016)
• Page Start: E83
• Page End: E87
• Publication Date: 2015-12-29
• Subjects: graphene -- hardened cement paste -- structural supercapacitor; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0801603jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : This paper presents a novel structural supercapacitor based on graphene and hardened cement paste. The maximum specific capacitance is more than 10 F g −1 at the current density of 1A g −1 . The almost ideal rectangular cyclic voltammetry (CV) curve of the structural supercapacitors means that there is no pseudocapacitance effect. The triangular charge-discharge plots of the structural supercapacitor indicate an ideal double layer mechanism in the structural supercapacitor. Both the compressive strength and specific capacitance increase as the water-cement ratio decreases. But they don't change consistently with cement hydration time. As the cement hydrates, the strength increases, but the specific capacitance decreases and tends to a constant value.