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Electrochemically treated TiO2 for enhanced performance in aqueous Al-ion batteries

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
87a77226-24f0-4f69-87ef-d65dbb5af5c2
McKerracher, Rachel
f5f9f0e7-a256-4714-b752-e3bb8dab03fc
Cruden, Andrew
ed709997-4402-49a7-9ad5-f4f3c62d29ab
Wills, Richard
60b7c98f-eced-4b11-aad9-fd2484e26c2c
Holland, Alexander
87a77226-24f0-4f69-87ef-d65dbb5af5c2
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), 1-12, [2090]. (doi:10.3390/ma11112090).

Record type: Article

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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materials-11-02090 - Version of Record
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More information

Accepted/In Press date: 23 October 2018
e-pub ahead of print date: 25 October 2018
Published date: 25 October 2018
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
ORCID for Andrew Cruden: ORCID iD orcid.org/0000-0003-3236-2535
ORCID for Richard Wills: ORCID iD orcid.org/0000-0002-4805-7589

Catalogue record

Date deposited: 06 Nov 2018 17:30
Last modified: 03 May 2020 00:28

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