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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/21316

Title: From liquid to thin film: colloidal suspensions for tungsten oxide as an electrode material for Li-ion batteries
Authors: Van Den Ham, Jonathan
Elen, Ken
Kokal, I.
Yağci, B.
Peys, Nick
Bonneux, Gilles
Ulu, Fulya
Marchal, Wouter
Van Bael, Marlies K.
Hardy, An
Issue Date: 2016
Citation: RSC Advances (6), p. 51747-51756
Abstract: Using a colloidal suspension, tungsten oxide thin films (150 nm) have been prepared via ultrasonic spray deposition using two different current collectors, namely TiN and Pt. First, the precursor chemistry was studied, revealing that the tungsten present is reduced due to the formation of chlorine gas. Due to a dehydrogenation 1,1-diethoxyethane (DEE) and hydrogen chloride (HCl) evolve from the precursor, reducing the chloride content of the precursor. The thin films were annealed at 400 and 500 °C, yielding tetragonal tungsten oxide without the presence of chlorides. Electrochemical analysis indicated that the TiN current collector has a pronounced positive effect on cycling behavior of the WO3 thin film. A higher annealing temperature yields an improved performance, but annealing at temperatures as low as 400 °C also yielded electrochemically active WO3. The current study presents a versatile method to produce electrochemically active tungsten oxide thin films with a high volumetric capacity (640 mA h cm−3) at relatively low temperature to be applied in all-solid-state Li-ion batteries.
Notes: Van den Ham, EJ (reprint author), Hasselt Univ, Inst Mat Res Inorgan & Phys Chem, Martelarenlaan 42, B-3500 Hasselt, Belgium. jonathan.vandenham@uhasselt.be
URI: http://hdl.handle.net/1942/21316
DOI: 10.1039/C6RA08769H
ISI #: 000382079800034
ISSN: 2046-2069
Category: A1
Type: Journal Contribution
Validation: ecoom, 2017
Appears in Collections: Research publications

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