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CuHCF as an electrode material in an aqueous dual-ion A1³+/K+ion battery

CuHCF as an electrode material in an aqueous dual-ion A1³+/K+ion battery
CuHCF as an electrode material in an aqueous dual-ion A1³+/K+ion battery
Copper-hexacyanoferrate (CuHCF) is capable of 28000 cycles in 1 mol dm-3 AlCl3 in a 3-electrode cell, while performanceimproves with the addition of K+. However, CuHCF synthesised by co-precipitation is in a partially oxidised state, resulting in aneffective state-of-charge (SoC) of 90%. Chemical reduction is possible by soaking electrodes in 10 mmol dm-3 Na2S2O3 to producean electrode at 0% SoC, while chemical oxidation in 100 mmol dm-3 KMnO4 is possible in order to produce electrodes at 100%SoC. Despite this, a full cell constisting of a TiO2 negative electrode, CuHCF positive electrode and 1 mol dm-3 AlCl3/1 mol dm-3KCl, allows ca. 1100 cycles due to the premature degradation of CuHCF. This is due to the low coulombic efficiency (CE) of TiO2,which results in consistent overcharging of CuHCF and the likely loss of Fe3 to the electrolyte.
hybrid aluminium-ion, TiO2, CuHCF, aqueous battery, High-rate
2352-4847
69-73
Holland, Alexander
e58ebfdb-e31a-4962-bd40-530cd8ee4cb6
Kimpton, Harriet, Jill
30c744e7-3f80-4a81-a53c-03f44074a805
Cruden, Andrew
ed709997-4402-49a7-9ad5-f4f3c62d29ab
Wills, Richard
60b7c98f-eced-4b11-aad9-fd2484e26c2c
Holland, Alexander
e58ebfdb-e31a-4962-bd40-530cd8ee4cb6
Kimpton, Harriet, Jill
30c744e7-3f80-4a81-a53c-03f44074a805
Cruden, Andrew
ed709997-4402-49a7-9ad5-f4f3c62d29ab
Wills, Richard
60b7c98f-eced-4b11-aad9-fd2484e26c2c

Holland, Alexander, Kimpton, Harriet, Jill, Cruden, Andrew and Wills, Richard (2018) CuHCF as an electrode material in an aqueous dual-ion A1³+/K+ion battery. Energy Reports, 151, 69-73. (doi:10.1016/j.egypro.2018.09.029).

Record type: Article

Abstract

Copper-hexacyanoferrate (CuHCF) is capable of 28000 cycles in 1 mol dm-3 AlCl3 in a 3-electrode cell, while performanceimproves with the addition of K+. However, CuHCF synthesised by co-precipitation is in a partially oxidised state, resulting in aneffective state-of-charge (SoC) of 90%. Chemical reduction is possible by soaking electrodes in 10 mmol dm-3 Na2S2O3 to producean electrode at 0% SoC, while chemical oxidation in 100 mmol dm-3 KMnO4 is possible in order to produce electrodes at 100%SoC. Despite this, a full cell constisting of a TiO2 negative electrode, CuHCF positive electrode and 1 mol dm-3 AlCl3/1 mol dm-3KCl, allows ca. 1100 cycles due to the premature degradation of CuHCF. This is due to the low coulombic efficiency (CE) of TiO2,which results in consistent overcharging of CuHCF and the likely loss of Fe3 to the electrolyte.

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Accepted/In Press date: 11 September 2018
e-pub ahead of print date: 1 November 2018
Keywords: hybrid aluminium-ion, TiO2, CuHCF, aqueous battery, High-rate

Identifiers

Local EPrints ID: 450819
URI: http://eprints.soton.ac.uk/id/eprint/450819
ISSN: 2352-4847
PURE UUID: 98cb13e5-e322-4929-952d-841f0ff7c9d4
ORCID for Harriet, Jill Kimpton: ORCID iD orcid.org/0000-0002-3219-217X
ORCID for Andrew Cruden: ORCID iD orcid.org/0000-0003-3236-2535
ORCID for Richard Wills: ORCID iD orcid.org/0000-0002-4805-7589

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Date deposited: 12 Aug 2021 16:31
Last modified: 13 Aug 2021 01:45

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Contributors

Author: Alexander Holland
Author: Harriet, Jill Kimpton ORCID iD
Author: Andrew Cruden ORCID iD
Author: Richard Wills ORCID iD

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