Hollow NiCo2S4 nanotube arrays grown on carbon textile as a self-supported electrode for asymmetric supercapacitors. Issue 12 (25th January 2016)

• Record Type: Journal Article
• Authors: Hao, Liang; Shen, Laifa; Wang, Jie; Xu, Yunling; Zhang, Xiaogang
• Is Part Of: RSC advances. Volume 6:Issue 12(2016)
• Page Start: 9950
• Page End: 9957
• Publication Date: 2016-01-25
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra24068a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : We developed an asymmetric supercapacitor using NiCo2 S4 nanotube arrays grown on carbon textile, achieving a high energy density (∼40.1 W h kg −1 at 451 W kg −1 ), a high power density (∼4725 W kg −1 at 21 W h kg −1 ) and excellent cyclability. Abstract : Although supercapacitors possess a fast charge/discharge capability, the practical application of supercapacitors is still hindered largely by their low energy density. Improving the electrochemical performance of supercapacitors depends largely on the development of novel electrode materials and hybrid systems. In this work, hollow NiCo2 S4 nanotube arrays are successfully grown on carbon textile (CT) with robust adhesion through a two-step synthesis, involving the growth of a solid nanowire precursor and subsequent conversion into NiCo2 S4 nanotubes using a sulfidation process. Using CT-supported NiCo2 S4 nanotube arrays as the positive electrode and activated carbon as the negative electrode, a high-performance asymmetric supercapacitor with a maximum voltage of 1.6 V has been fabricated, which manifests high energy density (∼40.1 W h kg −1 at 451 W kg −1 ), high power density (∼4725 W kg −1 at 21 W h kg −1 ) and excellent cyclability.