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https://hdl.handle.net/2440/121686
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Type: | Journal article |
Title: | A 2.0 V capacitive device derived from shape-preserved metal nitride nanorods |
Author: | Zhu, C. Sun, Y. Chao, D. Wang, X. Yang, P. Zhang, X. Huang, H. Zhang, H. Fan, H.J. |
Citation: | Nano Energy, 2016; 26:1-6 |
Publisher: | Elsevier |
Issue Date: | 2016 |
ISSN: | 2211-2855 2211-3282 |
Statement of Responsibility: | Changrong Zhu, Yanfeng Sun, Dongliang Chao, Xinghui Wang, Peihua Yang, Xiao Zhang, Hui Huang, Hua Zhang, Hong Jin Fan |
Abstract: | A high working voltage and fast charging/discharging capability are important to a supercapacitor device in order to achieve decent energy densities with high power. In this work, we report 2.0 V quasi-solid-state symmetric capacitive device based on Fe2N-Ti2N (FTN) core-shell nanorod array electrodes. Through a surface protection by a thin and ultra-stable Ti2N shell, Fe2N converted from its oxyhydroxide precursor inhibits the original nanorod structure. Due to advantageous features of these core-shell metal nitride electrodes (e.g., high conductivity, structure stability, direct current path), the symmetric device permits ultrahigh scan rates (up to 50 V s−1) and delivers fairly stable capacitance in long-term cycles (~82 F g−1 with ~99% capacitance retention in 20,000 cycles). As a result, the supercapacitor exhibits an impressive energy density of ~48.5 W h kg−1 at the power of 2700 W kg−1. These results demonstrate the potentialities of metal nitride nanorods array for high energy density capacitive device. |
Keywords: | Symmetric supercapacitor; high working voltage; metal nitride; electrochemical capacitor; atomic layer deposition |
Rights: | © 2016 Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.nanoen.2016.04.056 |
Published version: | http://dx.doi.org/10.1016/j.nanoen.2016.04.056 |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
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