Preparation of binder-free CuO/Cu2O/Cu composites: a novel electrode material for supercapacitor applications. Issue 34 (17th March 2016)

• Record Type: Journal Article
• Authors: Xu, Panpan; Liu, Jijun; Liu, Tong; Ye, Ke; Cheng, Kui; Yin, Jinling; Cao, Dianxue; Wang, Guiling; Li, Qiang
• Is Part Of: RSC advances. Volume 6:Issue 34(2016)
• Page Start: 28270
• Page End: 28278
• Publication Date: 2016-03-17
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra00004e
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The results of XRD and XPS demonstrate that CuO/Cu2 O/Cu is prepared successfully via a facile, eco-friendly, one-step template-free growth process. SEM figures show that cubic CuO/Cu2 O/Cu uniformly and densely covers a skeleton of nickel foam. Abstract : Cuprous(i ) oxide (Cu2 O) carries high theoretical specific capacitance (2247.6 F g −1 ), however, the amount of research about the supercapacitive performance of Cu2 O is relatively small compared with other transition metal oxides. A composite of metal and metal oxide could improve the electrochemical performance efficiently. In this work, the results of XRD and XPS demonstrate that CuO/Cu2 O/Cu is prepared successfully via a facile, eco-friendly, one-step template-free growth process. SEM figures show that cubic CuO/Cu2 O/Cu uniformly and densely covers a skeleton of nickel foam. The binder-free CuO/Cu2 O/Cu electrode exhibits excellent supercapacitive performance with a high specific capacitance of 878 F g −1 at a current density of 5 mA cm −2 (1.67 A g −1 ), when the current density is enlarged ten times (50 mA cm −2 (16.7 A g −1 )), the specific capacitance still remains at 545 F g −1 . Furthermore, we have first successfully constructed a CuO/Cu2 O/Cu//AC asymmetric supercapacitor, which can achieve an energy density of 42 W h kg −1 at a power density of 0.44 kW kg −1 . The good electrochemical performance and simple accessibility prove that the as-prepared CuO/Cu2 O/Cu/NF electrode has a potential application in electrochemical capacitors.