Hierarchical Mo9Se11 nanoneedles on nanosheet with enhanced electrochemical properties as a battery-type electrode for asymmetric supercapacitors

A hierarchical nanostructure of orthorhombic Mo9Se11 is synthesized by colloidal processing and evaluated for its application as an electrode for asymmetric supercapacitors (ASCs). The material is characterized by X-ray and electron diffraction, X-ray photoelectron spectroscopy, gas adsorption studi...

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Main Authors: Rajan, Jose, Radhiyah, Abd Aziz, Saifful Kamaluddin, Muzakir, Izan Izwan, Misnon, Jamil, Ismail
Format: Article
Language:English
Published: Elsevier Ltd 2016
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Online Access:http://umpir.ump.edu.my/id/eprint/12498/
http://umpir.ump.edu.my/id/eprint/12498/
http://umpir.ump.edu.my/id/eprint/12498/
http://umpir.ump.edu.my/id/eprint/12498/1/Mo9Se11.pdf
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spelling ump-124982018-10-03T08:50:23Z http://umpir.ump.edu.my/id/eprint/12498/ Hierarchical Mo9Se11 nanoneedles on nanosheet with enhanced electrochemical properties as a battery-type electrode for asymmetric supercapacitors Rajan, Jose Radhiyah, Abd Aziz Saifful Kamaluddin, Muzakir Izan Izwan, Misnon Jamil, Ismail Q Science (General) QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering A hierarchical nanostructure of orthorhombic Mo9Se11 is synthesized by colloidal processing and evaluated for its application as an electrode for asymmetric supercapacitors (ASCs). The material is characterized by X-ray and electron diffraction, X-ray photoelectron spectroscopy, gas adsorption studies, scanning and transmission electron microscopies for their crystal structure, surface and morphological properties. These studies show that colloidal synthesized Mo9Se11 has a hierarchical structure in the form of nanoneedles grown on its nanosheet. The nanoneedles are single crystalline with circular cross-section of diameter ∼10–20 nm at the root, ∼6–10 nm at the tip and length ∼5–10 μm. Electrochemical properties of the material are studied in detail in three moderately conductive alkaline electrolytes, viz. 3 M of LiOH, NaOH, and KOH employing cyclic voltammetry, galvanostatic charge discharge cycling, and electrochemical impedance spectroscopy. The Mo9Se11 electrodes showed superior specific capacitance (CS ∼510 F g−1) and larger voltage window (up to 0.7 V) in the LiOH electrolyte. We show that the excellent electrochemical properties of Mo9Se11 can be assigned to the hierarchical microstructure and its one-dimensional channel structure; those accommodate and facilitate fast redox reactions for electrons and ions. Furthermore, ASCs were fabricated using the Mo9Se11 as a battery-type electrode and commercial activated carbon as supercapacitor electrode; the devices showed larger voltage window, energy density (ES), and power density (PS) than many of the devices reported in literature. The ASCs showed six times higher ES while maintaining similar PS than a control supercapacitor fabricated using activated carbon(AC). Keywords: Electrochemical charge storage; Asymmetric supercapacitor; Transition metal chalcogenides; Intercalation capacitance doi: org/10.1016/j.jallcom.2016.02.221 Elsevier Ltd 2016-03-03 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/12498/1/Mo9Se11.pdf Rajan, Jose and Radhiyah, Abd Aziz and Saifful Kamaluddin, Muzakir and Izan Izwan, Misnon and Jamil, Ismail (2016) Hierarchical Mo9Se11 nanoneedles on nanosheet with enhanced electrochemical properties as a battery-type electrode for asymmetric supercapacitors. Journal of Alloys and Compounds, 673. pp. 390-398. ISSN 0925-8388 (print), 1873-4669 (online) http://dx.doi.org/10.1016/j.jallcom.2016.02.221 doi:org/10.1016/j.jallcom.2016.02.221
repository_type Digital Repository
institution_category Local University
institution Universiti Malaysia Pahang
building UMP Institutional Repository
collection Online Access
language English
topic Q Science (General)
QC Physics
QD Chemistry
TK Electrical engineering. Electronics Nuclear engineering
spellingShingle Q Science (General)
QC Physics
QD Chemistry
TK Electrical engineering. Electronics Nuclear engineering
Rajan, Jose
Radhiyah, Abd Aziz
Saifful Kamaluddin, Muzakir
Izan Izwan, Misnon
Jamil, Ismail
Hierarchical Mo9Se11 nanoneedles on nanosheet with enhanced electrochemical properties as a battery-type electrode for asymmetric supercapacitors
description A hierarchical nanostructure of orthorhombic Mo9Se11 is synthesized by colloidal processing and evaluated for its application as an electrode for asymmetric supercapacitors (ASCs). The material is characterized by X-ray and electron diffraction, X-ray photoelectron spectroscopy, gas adsorption studies, scanning and transmission electron microscopies for their crystal structure, surface and morphological properties. These studies show that colloidal synthesized Mo9Se11 has a hierarchical structure in the form of nanoneedles grown on its nanosheet. The nanoneedles are single crystalline with circular cross-section of diameter ∼10–20 nm at the root, ∼6–10 nm at the tip and length ∼5–10 μm. Electrochemical properties of the material are studied in detail in three moderately conductive alkaline electrolytes, viz. 3 M of LiOH, NaOH, and KOH employing cyclic voltammetry, galvanostatic charge discharge cycling, and electrochemical impedance spectroscopy. The Mo9Se11 electrodes showed superior specific capacitance (CS ∼510 F g−1) and larger voltage window (up to 0.7 V) in the LiOH electrolyte. We show that the excellent electrochemical properties of Mo9Se11 can be assigned to the hierarchical microstructure and its one-dimensional channel structure; those accommodate and facilitate fast redox reactions for electrons and ions. Furthermore, ASCs were fabricated using the Mo9Se11 as a battery-type electrode and commercial activated carbon as supercapacitor electrode; the devices showed larger voltage window, energy density (ES), and power density (PS) than many of the devices reported in literature. The ASCs showed six times higher ES while maintaining similar PS than a control supercapacitor fabricated using activated carbon(AC). Keywords: Electrochemical charge storage; Asymmetric supercapacitor; Transition metal chalcogenides; Intercalation capacitance doi: org/10.1016/j.jallcom.2016.02.221
format Article
author Rajan, Jose
Radhiyah, Abd Aziz
Saifful Kamaluddin, Muzakir
Izan Izwan, Misnon
Jamil, Ismail
author_facet Rajan, Jose
Radhiyah, Abd Aziz
Saifful Kamaluddin, Muzakir
Izan Izwan, Misnon
Jamil, Ismail
author_sort Rajan, Jose
title Hierarchical Mo9Se11 nanoneedles on nanosheet with enhanced electrochemical properties as a battery-type electrode for asymmetric supercapacitors
title_short Hierarchical Mo9Se11 nanoneedles on nanosheet with enhanced electrochemical properties as a battery-type electrode for asymmetric supercapacitors
title_full Hierarchical Mo9Se11 nanoneedles on nanosheet with enhanced electrochemical properties as a battery-type electrode for asymmetric supercapacitors
title_fullStr Hierarchical Mo9Se11 nanoneedles on nanosheet with enhanced electrochemical properties as a battery-type electrode for asymmetric supercapacitors
title_full_unstemmed Hierarchical Mo9Se11 nanoneedles on nanosheet with enhanced electrochemical properties as a battery-type electrode for asymmetric supercapacitors
title_sort hierarchical mo9se11 nanoneedles on nanosheet with enhanced electrochemical properties as a battery-type electrode for asymmetric supercapacitors
publisher Elsevier Ltd
publishDate 2016
url http://umpir.ump.edu.my/id/eprint/12498/
http://umpir.ump.edu.my/id/eprint/12498/
http://umpir.ump.edu.my/id/eprint/12498/
http://umpir.ump.edu.my/id/eprint/12498/1/Mo9Se11.pdf
first_indexed 2023-09-18T22:14:12Z
last_indexed 2023-09-18T22:14:12Z
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