Holey graphene interpenetrating networks for boosting high-capacitive Co3O4 electrodes via an electrophoretic deposition process. Issue 19 (1st October 2021)

• Record Type: Journal Article
• Authors: Yun, Micun; Ma, Yifei; Cai, Zhuo; Ji, Haomin; Han, Jiemin; Wang, Mei; Tong, Zhaomin; Xiao, Liantuan; Jia, Suotang; Chen, Xuyuan
• Is Part Of: Ceramics international. Volume 47:Issue 19(2021)
• Page Start: 27210
• Page End: 27216
• Publication Date: 2021-10-01
• Subjects: Co3O4 -- Holey graphene -- Electrophoretic deposition -- Supercapacitor; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.06.143
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A composite of Co3 O4 /holey graphene (Co3 O4 /HG) was prepared via a facile hydrothermal route, and was then processed into an electrode by an electrophoretic deposition process. Holey graphene (HG) wrapped Co3 O4 to form a 3D skeleton network, thereby providing high electrical conductivity, and the holes in HG could further shorten the electrolyte ion diffusion pathway. Therefore, by adjusting the mass ratio of Co3 O4 to HG, the Co3 O4 /HG composite afforded an enhanced capacitance of 2714 F g −1 (at a current density of 1 A g −1 ), which is 20 times higher than that of pure Co3 O4 . To further explore the practical applications of Co3 O4 /HG, a symmetric supercapacitor employing Co3 O4 /HG was fabricated. The supercapacitor functioned stably at potentials up to 1.2 V, with an enhanced energy density of 165 Wh kg −1 and a high power density of 0.6 kW kg −1 at 1 A g −1 .