Control of magnesium interfacial reactions in aqueous electrolytes towards a biocompatible battery

Bjorn Winther Jensen; M. Gaadingwe; D. R. Macfarlane; M. Forsyth

doi:10.1016/j.electacta.2008.04.005

Control of magnesium interfacial reactions in aqueous electrolytes towards a biocompatible battery

Bjorn Winther Jensen, M. Gaadingwe, D. R. Macfarlane, M. Forsyth

Research output: Contribution to journal › Article

33 Citations (Scopus)

Abstract

A stable magnesium battery has been developed based on a magnesium anode, a poly(dioxyethane thiophene) (PEDOT) cathode and a near-saturated aqueous solution of LiCl, MgCl₂, or mixture of these salts at pH of 11. This combination leads to a low water activity in the electrolyte, which thus suppresses the hydrogen evolution reaction on Mg, as well as producing a stable oxy-hydroxide film which protects the metal surface from freely corroding. The conducting polymer cathode is reduced somewhat during the discharge process, however, appears to be readily re-oxidised (as determined from the resistance) by the oxygen present in the cell. The cell is therefore primarily a Mg/O₂ battery, however, the PEDOT appears to enhance the performance, in particular the discharge voltage.

Original language	English
Pages (from-to)	5881-5884
Number of pages	4
Journal	Electrochimica Acta
Volume	53
Issue number	20
DOIs	https://doi.org/10.1016/j.electacta.2008.04.005
Publication status	Published - 2008 Aug 20
Externally published	Yes

Keywords

Aqueous electrolyte
Biocompatible battery
Mg passivation
Poly(3,4-ethylene dioxythiophene)
Primary battery

ASJC Scopus subject areas

Chemical Engineering(all)
Analytical Chemistry
Electrochemistry

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Winther Jensen, B., Gaadingwe, M., Macfarlane, D. R., & Forsyth, M. (2008). Control of magnesium interfacial reactions in aqueous electrolytes towards a biocompatible battery. Electrochimica Acta, 53(20), 5881-5884. https://doi.org/10.1016/j.electacta.2008.04.005

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abstract = "A stable magnesium battery has been developed based on a magnesium anode, a poly(dioxyethane thiophene) (PEDOT) cathode and a near-saturated aqueous solution of LiCl, MgCl2, or mixture of these salts at pH of 11. This combination leads to a low water activity in the electrolyte, which thus suppresses the hydrogen evolution reaction on Mg, as well as producing a stable oxy-hydroxide film which protects the metal surface from freely corroding. The conducting polymer cathode is reduced somewhat during the discharge process, however, appears to be readily re-oxidised (as determined from the resistance) by the oxygen present in the cell. The cell is therefore primarily a Mg/O2 battery, however, the PEDOT appears to enhance the performance, in particular the discharge voltage.",

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