An Aqueous Asymmetric Supercapacitor Based on Activated Carbon and Tungsten Trioxide Nanowire Electrodes. Issue 1 (10th August 2016)

• Record Type: Journal Article
• Authors: Yuan, Xinhai; Chen, Bingwei; Wu, Xiongwei; Mo, Jun; Liu, Zaichun; Hu, Zhengyong; Liu, Zhonghua; Zhou, Chunjiao; Yang, Haijun; Wu, Yuping
• Is Part Of: Chinese journal of chemistry. Volume 35:Issue 1(2017)
• Page Start: 61
• Page End: 66
• Publication Date: 2016-08-10
• Subjects: asymmetric supercapacitor -- tungsten trioxide -- nanowire; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cjoc.201600212
• Languages: English
• ISSNs: 1001-604X

Abstract

Abstract: An asymmetric supercapacitor (ASC) was assembled by using an activated carbon as positive electrode and WO3 nanowire as negative electrode, and its electrical performances were tested in voltage windows ranging from 0 to 1.5 V. A high specific capacitance of 51 Fg −1 could be achieved at the current density of 0.25 Ag −1 . Moreover, the ASC displays a good cycling stability with 86% of capacitance retention after 800 cycles, its energy density can be up to 11.9 Whkg −1 at the power density of 210 Wkg −1, and remains 7.7 Whkg −1 at a power density of 1250 W kg −1 . The excellent electrical performance is perhaps due to the crystal orientation of (001) planes for the WO3 nanowire, which favors the rapid reaction between W(VI) and H + cations. This aqueous asymmetric WO3 //AC supercapacitor is promising for practical applications due to its easy preparation of WO3 . Abstract : An asymmetric supercapacitor (ASC) was assembled by using an activated carbon as positive electrode and WO3 nanowire as negative electrode, and its electrical performances were tested in voltage windows ranging from 0 to 1.5 V. The WO3 //AC ASC exhibits superior electrochemical capacitive properties, including wider operating voltage window (1.5 V), high energy density of 11.9 Whkg −1 at the power density of 210 Wkg −1 and good cycling stability.