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Title: In-situ functionalization of metal electrodes for advanced asymmetric supercapacitors
Authors: Sun, Leimeng
Wang, Xinghui
Wang, Yurong
Xiao, Dongyang
Cai, Weifan
Jing, Yuan
Wang, Yanrong
Hu, Fangjing
Zhang, Qing
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2019
Source: Sun, L., Wang, X., Wang, Y., Xiao, D., Cai, W., Jing, Y., . . . Zhang, Q. (2019). In-situ functionalization of metal electrodes for advanced asymmetric supercapacitors. Frontiers in Chemistry, 7, 512-. doi:10.3389/fchem.2019.00512
Journal: Frontiers in Chemistry
Abstract: Nanostructured metal-based compound electrodes with excellent electrochemical activity and electrical conductivity are promising for high-performance energy storage applications. In this paper, we report an asymmetric supercapacitor based on Ti and Cu coated vertical-aligned carbon nanotube electrodes on carbon cloth. The active material is achieved by in-situ functionalization using a high-temperature annealing process. Scanning and transmission electron microscopy and Raman spectroscopy confirm the detailed nanostructures and composition of the electrodes. The TiC@VCC and CuxS@VCC electrodes show a high specific capacity of 200.89 F g−1 and 228.37 F g−1, respectively, and good capacitive characteristics at different scan speeds. The excellent performance can be attributed to a large surface area to volume ratio and high electrical conductivity of the electrodes. Furthermore, an asymmetric supercapacitor is assembled with TiC@VCC as anode and CuxS@VCC as cathode. The full device can operate within the 0–1.4 V range, and shows a maximum energy density of 9.12 Wh kg−1 at a power density of 46.88 W kg−1. These findings suggest that the metal-based asymmetric electrodes have a great potential for supercapacitor applications.
ISSN: 2296-2646
DOI: 10.3389/fchem.2019.00512
Rights: © 2019 Sun, Wang, Wang, Xiao, Cai, Jing, Wang, Hu and Zhang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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