Redox supercapacitor performance of nanocrystalline molybdenum nitrides obtained by ammonolysis of chloride- and amide-derived precursors
Redox supercapacitor performance of nanocrystalline molybdenum nitrides obtained by ammonolysis of chloride- and amide-derived precursors
Reactions of MoCl5 or Mo(NMe2)4 with ammonia result in cubic γ-Mo2N or hexagonal δ1-MoN depending on reaction time and temperature. At moderate temperatures the cubic product from Mo(NMe2)4 exhibits lattice distortions. Fairly high surface areas are observed in the porous particles of the chloride-derived materials and high capacitances of up to 275 F g-1 are observed when electrodes made from them are cycled in aqueous H2SO4 or K2SO4 electrolytes. The cyclic voltammograms suggest charge is largely stored in the electrochemical double layer at the surface of these materials. Amide-derived molybdenum nitrides have relatively low surface areas and smaller capacitances, but do exhibit strong redox features in their cyclic voltammograms, suggesting that redox capacitance is responsible for a significant proportion of the charge stored.
molybdenum, nitride, supercapcitor, double layer, redox
456-463
Shah, S. Imran U.
c6698fec-7cda-4b2f-b2c1-fcbcd404743e
Hector, Andrew L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Owen, John R.
067986ea-f3f3-4a83-bc87-7387cc5ac85d
15 November 2014
Shah, S. Imran U.
c6698fec-7cda-4b2f-b2c1-fcbcd404743e
Hector, Andrew L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Owen, John R.
067986ea-f3f3-4a83-bc87-7387cc5ac85d
Shah, S. Imran U., Hector, Andrew L. and Owen, John R.
(2014)
Redox supercapacitor performance of nanocrystalline molybdenum nitrides obtained by ammonolysis of chloride- and amide-derived precursors.
Journal of Power Sources, 266, .
(doi:10.1016/j.jpowsour.2014.05.045).
Abstract
Reactions of MoCl5 or Mo(NMe2)4 with ammonia result in cubic γ-Mo2N or hexagonal δ1-MoN depending on reaction time and temperature. At moderate temperatures the cubic product from Mo(NMe2)4 exhibits lattice distortions. Fairly high surface areas are observed in the porous particles of the chloride-derived materials and high capacitances of up to 275 F g-1 are observed when electrodes made from them are cycled in aqueous H2SO4 or K2SO4 electrolytes. The cyclic voltammograms suggest charge is largely stored in the electrochemical double layer at the surface of these materials. Amide-derived molybdenum nitrides have relatively low surface areas and smaller capacitances, but do exhibit strong redox features in their cyclic voltammograms, suggesting that redox capacitance is responsible for a significant proportion of the charge stored.
Text
366967.pdf
- Accepted Manuscript
More information
e-pub ahead of print date: 20 May 2014
Published date: 15 November 2014
Keywords:
molybdenum, nitride, supercapcitor, double layer, redox
Organisations:
Electrochemistry
Identifiers
Local EPrints ID: 366967
URI: http://eprints.soton.ac.uk/id/eprint/366967
ISSN: 0378-7753
PURE UUID: b819a759-7506-43fb-a2d7-de2e97fbcc7b
Catalogue record
Date deposited: 21 Jul 2014 09:36
Last modified: 15 Mar 2024 02:52
Export record
Altmetrics
Contributors
Author:
S. Imran U. Shah
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
