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Synthesis of NiMoS4 for high-performance hybrid supercapacitors
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Du, Dongwei, Lan, Rong, Humphreys, John, Xu, Wei, Xie, Kui, Wang, Huanting and Tao, Shanwen (2017) Synthesis of NiMoS4 for high-performance hybrid supercapacitors. Journal of The Electrochemical Society, 164 (12). A2881-A2888. doi:10.1149/2.0071713jes ISSN 0013-4651.
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WRAP-synthesis-NiMoS4-high-performance-hybrid-supercapacitors-Tao-2017.pdf - Accepted Version - Requires a PDF viewer. Download (2889Kb) | Preview |
Official URL: http://dx.doi.org/10.1149/2.0071713jes
Abstract
Transition metal sulfides have been suggested as promising materials for efficient energy storage with superior electrochemical performances. Compound NiMoS4-A was synthesized by a facile chemical co-precipitation process, followed by calcining at 450°C in Ar. The as-prepared NiMoS4-A electrode exhibits a high specific capacity of 313 C g−1 at 1 A g−1 and good rate capability (83% retention at 10 A g−1). Electrochemical impedance spectroscopy (EIS) results indicate that the good performances could be attributed to the low internal and charge transfer resistances. Additionally, the quantitative charge storage analysis reveals that the faradaic redox process dominates at lower scan rates (78% at 1 mV s−1), while the capacitive effect dominates at higher scan rates (56% at 20 mV s−1). Furthermore, a hybrid supercapacitor (HSC), with NiMoS4-A as the positive electrode and activated carbon (AC) as the negative electrode, displays a high energy density of 35 Wh kg−1 at an average power density of 400 W kg−1. Meanwhile, the HSC exhibits excellent cycle stability, maintaining 82% of the initial capacitance after 10000 charge-discharge cycles even at a high current density of 5 A g−1. These good electrochemical performances indicate that NiMoS4-A is a promising positive electrode material for hybrid supercapacitors.
Item Type: | Journal Article | ||||||
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Subjects: | Q Science > QD Chemistry T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
Library of Congress Subject Headings (LCSH): | Supercapacitors, Molybdenum compounds -- Synthesis, Nickel compounds -- Synthesis | ||||||
Journal or Publication Title: | Journal of The Electrochemical Society | ||||||
Publisher: | Electrochemical Society, Inc. | ||||||
ISSN: | 0013-4651 | ||||||
Official Date: | 21 September 2017 | ||||||
Dates: |
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Volume: | 164 | ||||||
Number: | 12 | ||||||
Page Range: | A2881-A2888 | ||||||
DOI: | 10.1149/2.0071713jes | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||
Description: | This article is a version of Paper 34 from the National Harbor, Maryland Meeting of the Society, October 1–5, 2017 |
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Date of first compliant deposit: | 1 November 2017 | ||||||
Date of first compliant Open Access: | 1 November 2017 | ||||||
Funder: | University of Warwick PhD studentship |
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