Electrochemically treated TiO2 for enhanced performance in aqueous Al-ion batteries
Electrochemically treated TiO2 for enhanced performance in aqueous Al-ion batteries
The potential for low cost, environmentally friendly and high rate energy storage has led to the study of anatase-TiO2 as an electrode material in aqueous Al3+ electrolytes. This paper describes the improved performance from an electrochemically treated composite TiO2 electrode for use in aqueous Al-ion batteries. After application of the cathodic electrochemical treatment in 1 mol/dm3 KOH, Mott-Schottky analysis showed the treated electrode as having an increased electron density and an altered open circuit potential, which remained stable throughout cycling. The cathodic treatment also resulted in a change in colour of TiO2. Treated-TiO2 demonstrated improved capacity, coulombic efficiency and stability when galvanostatically cycled in 1 mol·dm-3AlCl3/1 mol·dm-3 KCl. A treated-TiO2 electrode produced a capacity of 15.3 mA·h·g-1 with 99.95% coulombic efficiency at the high specific current of 10 A/g. Additionally, X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy were employed to elucidate the origin of this improved performance.
Aqueous Al-ion, Battery, Electrochemical treatment, High-rate, Titanium dioxide
1-12
Holland, Alexander
daf3bb84-22d0-4813-a7af-845adf3fed84
Mckerracher, Rachel
f5f9f0e7-a256-4714-b752-e3bb8dab03fc
Cruden, Andrew
ed709997-4402-49a7-9ad5-f4f3c62d29ab
Wills, Richard
60b7c98f-eced-4b11-aad9-fd2484e26c2c
1 November 2018
Holland, Alexander
daf3bb84-22d0-4813-a7af-845adf3fed84
Mckerracher, Rachel
f5f9f0e7-a256-4714-b752-e3bb8dab03fc
Cruden, Andrew
ed709997-4402-49a7-9ad5-f4f3c62d29ab
Wills, Richard
60b7c98f-eced-4b11-aad9-fd2484e26c2c
Holland, Alexander, Mckerracher, Rachel, Cruden, Andrew and Wills, Richard
(2018)
Electrochemically treated TiO2 for enhanced performance in aqueous Al-ion batteries.
Materials, 11 (11), , [2090].
(doi:10.3390/ma11112090).
Abstract
The potential for low cost, environmentally friendly and high rate energy storage has led to the study of anatase-TiO2 as an electrode material in aqueous Al3+ electrolytes. This paper describes the improved performance from an electrochemically treated composite TiO2 electrode for use in aqueous Al-ion batteries. After application of the cathodic electrochemical treatment in 1 mol/dm3 KOH, Mott-Schottky analysis showed the treated electrode as having an increased electron density and an altered open circuit potential, which remained stable throughout cycling. The cathodic treatment also resulted in a change in colour of TiO2. Treated-TiO2 demonstrated improved capacity, coulombic efficiency and stability when galvanostatically cycled in 1 mol·dm-3AlCl3/1 mol·dm-3 KCl. A treated-TiO2 electrode produced a capacity of 15.3 mA·h·g-1 with 99.95% coulombic efficiency at the high specific current of 10 A/g. Additionally, X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy were employed to elucidate the origin of this improved performance.
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More information
Accepted/In Press date: 23 October 2018
e-pub ahead of print date: 25 October 2018
Published date: 1 November 2018
Additional Information:
© 2018 by the authors
Keywords:
Aqueous Al-ion, Battery, Electrochemical treatment, High-rate, Titanium dioxide
Identifiers
Local EPrints ID: 425885
URI: http://eprints.soton.ac.uk/id/eprint/425885
PURE UUID: e373e8b6-9269-409d-80d7-ddf3abbd7abb
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Date deposited: 06 Nov 2018 17:30
Last modified: 06 Jun 2024 01:50
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Author:
Alexander Holland
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