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Effect of Electrolyte-to-Sulfur Ratio in the Cell on the Li-S Battery Performance
Date
2019-05-02
Author
Emerce, Nur Ber
Eroglu, Damla
Metadata
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The effect of electrolyte-to-sulfur (E/S) ratio on the electrochemical and cell- and systems-level performance of a Li-S battery is investigated through modeling efforts. A 1-D electrochemical model is proposed predicting the cell voltage at 60% discharge depth. In the model, increasing electrolyte amount improves the cell voltage by linearly increasing the cathode exchange current density, which is the single kinetic model parameter. Moreover, cathode specific capacity is either defined as a linear function of the E/S ratio or taken constant in the performance models. Increasing E/S ratio enhances the cell- and systems-level specific energy and energy density until 9 mL/g S when cathode specific capacity depends on the E/S ratio. However, when the cathode specific capacity is constant at 1200 mAh/g S, battery performance decreases continuously with increasing electrolyte amount. The effect of other critical design parameters-cathode thickness, carbon-to-sulfur ratio, S loading and excess Li%- are also considered in the analysis. (C) 2019 The Electrochemical Society.
Subject Keywords
Renewable Energy, Sustainability and the Environment
,
Electrochemistry
,
Materials Chemistry
,
Electronic, Optical and Magnetic Materials
,
Surfaces, Coatings and Films
,
Condensed Matter Physics
URI
https://hdl.handle.net/11511/65333
Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
DOI
https://doi.org/10.1149/2.0621908jes
Collections
Department of Chemical Engineering, Article
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N. B. Emerce and D. Eroglu, “Effect of Electrolyte-to-Sulfur Ratio in the Cell on the Li-S Battery Performance,”
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
, pp. 0–0, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65333.