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...

Full description

Bibliographic Details
Main Authors:	Rajan, Jose, Radhiyah, Abd Aziz, Saifful Kamaluddin, Muzakir, Izan Izwan, Misnon, Jamil, Ismail
Format:	Article
Language:	English
Published:	Elsevier Ltd 2016
Subjects:	Q Science (General) QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering
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

id	ump-12498
recordtype	eprints
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
_version_	1777415228207661056

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

Similar Items