Oxygen redox processes in PEGDME-based electrolytes for the Na-air battery

E. Faktorovich-Simon; A. Natan; E. Peled; D. Golodnitsky

doi:10.1007/s10008-017-3843-5

Oxygen redox processes in PEGDME-based electrolytes for the Na-air battery

E. Faktorovich-Simon, A. Natan, E. Peled, D. Golodnitsky

Tel Aviv University

Research output: Contribution to journal › Article › peer-review

Abstract

We present the characterization by the rotating-disc-electrode (RDE) and cyclic-voltammetry (CV) methods of oxygen-reduction/oxygen-evolution (ORR/OER) processes in the Na-air battery containing fresh and aged polyethylene glycol dimethyl ether 500 (PEGDME500)-based electrolyte. It was found that the time of storage of this solvent affects the oxidation overpotentials of the reduction products. It is suggested that the reason for the PEGDME500 change originates from the synthesis process, in which the sodium alcoholate molecule can remain in the solvent. Insertion of metallic sodium prevents aging of PEGDME500. The results are compared with a tetraethylene glycol dimethyl ether (TEGDME)-based electrolyte. It was shown that the voltammogram of the TEGDME-based electrolyte is similar to that of the fresh PEGDME500, but with the opposite ratio of NaO₂-to-Na₂O₂ oxidation currents. This indicates that Na₂O₂ is the main reduction product in TEGDME, and we suggest that in fresh PEGDME500, Na₂O₂ is formed by the chemical disproportionation of the dissolved NaO₂ in the solution.

Original language	English
Pages (from-to)	1015-1022
Number of pages	8
Journal	Journal of Solid State Electrochemistry
Volume	22
Issue number	4
DOIs	https://doi.org/10.1007/s10008-017-3843-5
State	Published - 1 Apr 2018

Keywords

Oxygen redox processes
PEGDME
Rotating disc electrode
Sodium-oxygen batteries
TEGDME

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Electrical and Electronic Engineering
General Materials Science
Electrochemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s10008-017-3843-5

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title = "Oxygen redox processes in PEGDME-based electrolytes for the Na-air battery",

abstract = "We present the characterization by the rotating-disc-electrode (RDE) and cyclic-voltammetry (CV) methods of oxygen-reduction/oxygen-evolution (ORR/OER) processes in the Na-air battery containing fresh and aged polyethylene glycol dimethyl ether 500 (PEGDME500)-based electrolyte. It was found that the time of storage of this solvent affects the oxidation overpotentials of the reduction products. It is suggested that the reason for the PEGDME500 change originates from the synthesis process, in which the sodium alcoholate molecule can remain in the solvent. Insertion of metallic sodium prevents aging of PEGDME500. The results are compared with a tetraethylene glycol dimethyl ether (TEGDME)-based electrolyte. It was shown that the voltammogram of the TEGDME-based electrolyte is similar to that of the fresh PEGDME500, but with the opposite ratio of NaO2-to-Na2O2 oxidation currents. This indicates that Na2O2 is the main reduction product in TEGDME, and we suggest that in fresh PEGDME500, Na2O2 is formed by the chemical disproportionation of the dissolved NaO2 in the solution.",

keywords = "Oxygen redox processes, PEGDME, Rotating disc electrode, Sodium-oxygen batteries, TEGDME",

author = "E. Faktorovich-Simon and A. Natan and E. Peled and D. Golodnitsky",

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T1 - Oxygen redox processes in PEGDME-based electrolytes for the Na-air battery

AU - Faktorovich-Simon, E.

AU - Natan, A.

AU - Peled, E.

AU - Golodnitsky, D.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - We present the characterization by the rotating-disc-electrode (RDE) and cyclic-voltammetry (CV) methods of oxygen-reduction/oxygen-evolution (ORR/OER) processes in the Na-air battery containing fresh and aged polyethylene glycol dimethyl ether 500 (PEGDME500)-based electrolyte. It was found that the time of storage of this solvent affects the oxidation overpotentials of the reduction products. It is suggested that the reason for the PEGDME500 change originates from the synthesis process, in which the sodium alcoholate molecule can remain in the solvent. Insertion of metallic sodium prevents aging of PEGDME500. The results are compared with a tetraethylene glycol dimethyl ether (TEGDME)-based electrolyte. It was shown that the voltammogram of the TEGDME-based electrolyte is similar to that of the fresh PEGDME500, but with the opposite ratio of NaO2-to-Na2O2 oxidation currents. This indicates that Na2O2 is the main reduction product in TEGDME, and we suggest that in fresh PEGDME500, Na2O2 is formed by the chemical disproportionation of the dissolved NaO2 in the solution.

AB - We present the characterization by the rotating-disc-electrode (RDE) and cyclic-voltammetry (CV) methods of oxygen-reduction/oxygen-evolution (ORR/OER) processes in the Na-air battery containing fresh and aged polyethylene glycol dimethyl ether 500 (PEGDME500)-based electrolyte. It was found that the time of storage of this solvent affects the oxidation overpotentials of the reduction products. It is suggested that the reason for the PEGDME500 change originates from the synthesis process, in which the sodium alcoholate molecule can remain in the solvent. Insertion of metallic sodium prevents aging of PEGDME500. The results are compared with a tetraethylene glycol dimethyl ether (TEGDME)-based electrolyte. It was shown that the voltammogram of the TEGDME-based electrolyte is similar to that of the fresh PEGDME500, but with the opposite ratio of NaO2-to-Na2O2 oxidation currents. This indicates that Na2O2 is the main reduction product in TEGDME, and we suggest that in fresh PEGDME500, Na2O2 is formed by the chemical disproportionation of the dissolved NaO2 in the solution.

KW - Oxygen redox processes

KW - PEGDME

KW - Rotating disc electrode

KW - Sodium-oxygen batteries

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DO - 10.1007/s10008-017-3843-5

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SN - 1432-8488

VL - 22

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EP - 1022

JO - Journal of Solid State Electrochemistry

JF - Journal of Solid State Electrochemistry

IS - 4

ER -

Oxygen redox processes in PEGDME-based electrolytes for the Na-air battery

Abstract

Keywords

All Science Journal Classification (ASJC) codes

UN SDGs

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