Controllable synthesis of porous CuO-Cu2O/rGO microspheres composite as high-performance electrode material for supercapacitors. Issue 9 (1st September 2020)

• Record Type: Journal Article
• Authors: Ju, Xin; Zhu, Xiuhong; Chang, Zhixiao; Guo, Lisong; Liao, Chunyan; Zong, Yan; Li, Xinghua; Zheng, Xinliang
• Is Part Of: Composite interfaces. Volume 27:Issue 9(2020)
• Page Start: 845
• Page End: 858
• Publication Date: 2020-09-01
• Subjects: Porous CuO-Cu2O/rGO microspheres -- electrochemical performance -- specific capacitance -- rate capability -- cycle stability -- supercapacitor; Composite materials -- Periodicals; 620.11805
• DOI: 10.1080/09276440.2019.1707024
• Languages: English
• ISSNs: 0927-6440

Abstract

ABSTRACT: Porous copper oxides/reduced graphene oxide (CuO-Cu2 O/rGO) microspheres composite was first prepared by a simple and environmentally friendly one-step hydrothermal method. The influences of graphene oxide (GO) on the ratio of CuO and Cu2 O and the corresponding electrochemical performance of the composite were investigated systematically. It was found that when the ratio of CuO and Cu2 O is about 1:5 by controlling GO adding amount, the composite exhibits excellent electrochemical performance, such as high specific capacitance (470 F·g −1 at a current density of 1 A·g −1 ), excellent rate capability (85.9% of capacity retention as current density increases from 1 to 10 A·g −1 ) and long cycle stability (81.3% of capacity retention after 5000 cycles at a current density of 1 A·g −1 ). Therefore, the porous high-performance CuO–Cu2 O/rGO microspheres composite has a great potential for supercapacitor applications.