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 journalArticle

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 languageEnglish
Pages (from-to)5881-5884
Number of pages4
JournalElectrochimica Acta
Volume53
Issue number20
DOIs
Publication statusPublished - 2008 Aug 20
Externally publishedYes

Fingerprint

Surface chemistry
Magnesium
Electrolytes
Cathodes
Thiophenes
Magnesium Chloride
Conducting polymers
Thiophene
Hydrogen
Anodes
Salts
Metals
Oxygen
Water
Electric potential
hydroxide ion

Keywords

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

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

Control of magnesium interfacial reactions in aqueous electrolytes towards a biocompatible battery. / Winther Jensen, Bjorn; Gaadingwe, M.; Macfarlane, D. R.; Forsyth, M.

In: Electrochimica Acta, Vol. 53, No. 20, 20.08.2008, p. 5881-5884.

Research output: Contribution to journalArticle

Winther Jensen, Bjorn ; Gaadingwe, M. ; Macfarlane, D. R. ; Forsyth, M. / Control of magnesium interfacial reactions in aqueous electrolytes towards a biocompatible battery. In: Electrochimica Acta. 2008 ; Vol. 53, No. 20. pp. 5881-5884.
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