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    Rights statement: This is the peer reviewed version of the following article: Rinaldi, A., Wijaya, O. and Hoster, H. E. (2016), Lithium-Oxygen Cells: An Analytical Model to Explain the Key Features in the Discharge Voltage Profiles. ChemElectroChem. Accepted Author Manuscript. doi:10.1002/celc.201600184 which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/celc.201600184/abstract This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.

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Lithium-oxygen cells: an analytical model to explain the key features in the discharge voltage profiles

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Lithium-oxygen cells: an analytical model to explain the key features in the discharge voltage profiles. / Rinaldi, Ali; Wijaya, Olivia; Hoster, Harry Ernst.
In: ChemElectroChem, Vol. 3, No. 11, 11.2016, p. 1944-1950.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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Rinaldi A, Wijaya O, Hoster HE. Lithium-oxygen cells: an analytical model to explain the key features in the discharge voltage profiles. ChemElectroChem. 2016 Nov;3(11):1944-1950. Epub 2016 Sept 1. doi: 10.1002/celc.201600184

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Rinaldi, Ali ; Wijaya, Olivia ; Hoster, Harry Ernst. / Lithium-oxygen cells : an analytical model to explain the key features in the discharge voltage profiles. In: ChemElectroChem. 2016 ; Vol. 3, No. 11. pp. 1944-1950.

Bibtex

@article{1dde904db5814bc8b290420e8d8bc2d3,
title = "Lithium-oxygen cells: an analytical model to explain the key features in the discharge voltage profiles",
abstract = "Sodium-oxygen Lithium-oxygen (Li-O2) cells are popular due to their potentially high energy density. A characteristic fingerprint of a given cell is the voltage profile during constant-current discharge. We suggest that the typical initial dip and the following increase of the voltage result from a temporary increase and slow decrease in the concentration of dissolved superoxide, respectively, feeding into the Nernst equation. The steady-state superoxide concentration decreases as the surface area of the solid precipitation product (Li2O2) increases. Importantly, these products bury the electrochemically active carbon surface. Assuming that the electrochemical step only occurs on bare carbon, the Tafel equation provides an expression for the increasing overpotential as a result of the shrinking effective electrode area. This boils the discharge voltage profile down to the sum of two logarithms, grasping all relevant features in recorded discharge voltage profiles.",
keywords = "batteries , discharge voltage profiles, EC mechanism, Li–O 2 cells , modelling",
author = "Ali Rinaldi and Olivia Wijaya and Hoster, {Harry Ernst}",
note = "This is the peer reviewed version of the following article: Rinaldi, A., Wijaya, O. and Hoster, H. E. (2016), Lithium-Oxygen Cells: An Analytical Model to Explain the Key Features in the Discharge Voltage Profiles. ChemElectroChem. Accepted Author Manuscript. doi:10.1002/celc.201600184 which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/celc.201600184/abstract This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.",
year = "2016",
month = nov,
doi = "10.1002/celc.201600184",
language = "English",
volume = "3",
pages = "1944--1950",
journal = "ChemElectroChem",
issn = "2196-0216",
publisher = "John Wiley and Sons Ltd",
number = "11",

}

RIS

TY - JOUR

T1 - Lithium-oxygen cells

T2 - an analytical model to explain the key features in the discharge voltage profiles

AU - Rinaldi, Ali

AU - Wijaya, Olivia

AU - Hoster, Harry Ernst

N1 - This is the peer reviewed version of the following article: Rinaldi, A., Wijaya, O. and Hoster, H. E. (2016), Lithium-Oxygen Cells: An Analytical Model to Explain the Key Features in the Discharge Voltage Profiles. ChemElectroChem. Accepted Author Manuscript. doi:10.1002/celc.201600184 which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/celc.201600184/abstract This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.

PY - 2016/11

Y1 - 2016/11

N2 - Sodium-oxygen Lithium-oxygen (Li-O2) cells are popular due to their potentially high energy density. A characteristic fingerprint of a given cell is the voltage profile during constant-current discharge. We suggest that the typical initial dip and the following increase of the voltage result from a temporary increase and slow decrease in the concentration of dissolved superoxide, respectively, feeding into the Nernst equation. The steady-state superoxide concentration decreases as the surface area of the solid precipitation product (Li2O2) increases. Importantly, these products bury the electrochemically active carbon surface. Assuming that the electrochemical step only occurs on bare carbon, the Tafel equation provides an expression for the increasing overpotential as a result of the shrinking effective electrode area. This boils the discharge voltage profile down to the sum of two logarithms, grasping all relevant features in recorded discharge voltage profiles.

AB - Sodium-oxygen Lithium-oxygen (Li-O2) cells are popular due to their potentially high energy density. A characteristic fingerprint of a given cell is the voltage profile during constant-current discharge. We suggest that the typical initial dip and the following increase of the voltage result from a temporary increase and slow decrease in the concentration of dissolved superoxide, respectively, feeding into the Nernst equation. The steady-state superoxide concentration decreases as the surface area of the solid precipitation product (Li2O2) increases. Importantly, these products bury the electrochemically active carbon surface. Assuming that the electrochemical step only occurs on bare carbon, the Tafel equation provides an expression for the increasing overpotential as a result of the shrinking effective electrode area. This boils the discharge voltage profile down to the sum of two logarithms, grasping all relevant features in recorded discharge voltage profiles.

KW - batteries

KW - discharge voltage profiles

KW - EC mechanism

KW - Li–O 2 cells

KW - modelling

U2 - 10.1002/celc.201600184

DO - 10.1002/celc.201600184

M3 - Journal article

VL - 3

SP - 1944

EP - 1950

JO - ChemElectroChem

JF - ChemElectroChem

SN - 2196-0216

IS - 11

ER -