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Aluminium-poly(3,4-ethylenedioxythiophene) rechargeable battery with ionic liquid electrolyte

Aluminium-poly(3,4-ethylenedioxythiophene) rechargeable battery with ionic liquid electrolyte
Aluminium-poly(3,4-ethylenedioxythiophene) rechargeable battery with ionic liquid electrolyte

Aluminium is one of the promising negative electrode materials for modern batteries. It is environmentally abundant, affordable and recyclable, and its three-electron redox reaction offers high theoretical specific energy and power. However, the development of a suitable positive electrode continues to limit the practical performance of aluminium batteries. In this study, the application of a 3D conductive polymer poly(3,4-ethylenedioxythiophene) (PEDOT) as a potential positive electrode material is reported. The battery performance, C-rate versus capacity extraction and successive charge/discharge cycling of a full cell (aluminium (-); PEDOT (+); EMImCl-AlCl3 ionic liquid electrolyte) is investigated. The design of the PEDOT electrode (using 3D reticulated vitreous carbon as substrate) is studied, and is supported by microstructure characterisation. The aluminium-PEDOT battery provides 50–64 Wh kg−1 specific energy and 32–40 W kg−1 specific power. The battery has a coulombic efficiency >95%, stable operation over 100 cycles and charge rates up to 80C. In summary, direct and meaningful progress has been made towards achieving useful capacity and cycling stability from aluminium batteries intended for future energy storage.

3D electrode, Aluminium battery, Conductive polymer, Ionic liquid electrolyte, Poly(3,4-ethylenedioxythiophene) (PEDOT)
2352-152X
Schoetz, Theresa
9b3c7333-1845-4792-b42b-48868ded0064
Craig, Ben
d616e0d5-d164-46e5-9f2d-ee768a2c7674
Ponce de Leon, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Bund, Andreas
138beee1-3117-40cf-a27d-7db197b1e1e8
Ueda, Mikito
88372229-ca73-42cd-bbdf-9986744ece06
Low, Chee Tong John
403cc9b5-b7d3-4f3e-9ef2-343761759853
Schoetz, Theresa
9b3c7333-1845-4792-b42b-48868ded0064
Craig, Ben
d616e0d5-d164-46e5-9f2d-ee768a2c7674
Ponce de Leon, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Bund, Andreas
138beee1-3117-40cf-a27d-7db197b1e1e8
Ueda, Mikito
88372229-ca73-42cd-bbdf-9986744ece06
Low, Chee Tong John
403cc9b5-b7d3-4f3e-9ef2-343761759853

Schoetz, Theresa, Craig, Ben, Ponce de Leon, Carlos, Bund, Andreas, Ueda, Mikito and Low, Chee Tong John (2020) Aluminium-poly(3,4-ethylenedioxythiophene) rechargeable battery with ionic liquid electrolyte. Journal of Energy Storage, 28, [101176]. (doi:10.1016/j.est.2019.101176).

Record type: Article

Abstract

Aluminium is one of the promising negative electrode materials for modern batteries. It is environmentally abundant, affordable and recyclable, and its three-electron redox reaction offers high theoretical specific energy and power. However, the development of a suitable positive electrode continues to limit the practical performance of aluminium batteries. In this study, the application of a 3D conductive polymer poly(3,4-ethylenedioxythiophene) (PEDOT) as a potential positive electrode material is reported. The battery performance, C-rate versus capacity extraction and successive charge/discharge cycling of a full cell (aluminium (-); PEDOT (+); EMImCl-AlCl3 ionic liquid electrolyte) is investigated. The design of the PEDOT electrode (using 3D reticulated vitreous carbon as substrate) is studied, and is supported by microstructure characterisation. The aluminium-PEDOT battery provides 50–64 Wh kg−1 specific energy and 32–40 W kg−1 specific power. The battery has a coulombic efficiency >95%, stable operation over 100 cycles and charge rates up to 80C. In summary, direct and meaningful progress has been made towards achieving useful capacity and cycling stability from aluminium batteries intended for future energy storage.

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More information

Accepted/In Press date: 21 December 2019
e-pub ahead of print date: 7 January 2020
Published date: 1 April 2020
Keywords: 3D electrode, Aluminium battery, Conductive polymer, Ionic liquid electrolyte, Poly(3,4-ethylenedioxythiophene) (PEDOT)

Identifiers

Local EPrints ID: 437386
URI: http://eprints.soton.ac.uk/id/eprint/437386
ISSN: 2352-152X
PURE UUID: 049536ec-86c6-43d2-ac96-2ac1c67d3b46
ORCID for Carlos Ponce de Leon: ORCID iD orcid.org/0000-0002-1907-5913

Catalogue record

Date deposited: 29 Jan 2020 17:32
Last modified: 30 Jan 2020 01:33

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