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Issue 4, 2013
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Precipitation in aqueous lithium–oxygen batteries: a model-based analysis

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Abstract

In this paper we present a model of the discharge of a lithium–oxygen battery with aqueous electrolyte. Lithium–oxygen batteries (Li–O2) have recently received great attention due to their large theoretical specific energy. Advantages of the aqueous design include the stability of the electrolyte, the long experience with gas diffusion electrodes (GDEs), and the solubility of the reaction product lithium hydroxide. However, competitive specific energies can only be obtained if the product is allowed to precipitate. Here we present a dynamic one-dimensional model of a Li–O2 battery including a GDE and precipitation of lithium hydroxide. The model is parameterized using experimental data from the literature. We demonstrate that GDEs remove power limitations due to slow oxygen transport in solutions and that lithium hydroxide tends to precipitate on the anode side. We discuss the system architecture to engineer where nucleation and growth predominantly occurs and to optimize for discharge capacity.

Graphical abstract: Precipitation in aqueous lithium–oxygen batteries: a model-based analysis

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Article information


Submitted
07 Dec 2012
Accepted
31 Jan 2013
First published
06 Feb 2013

Energy Environ. Sci., 2013,6, 1299-1314
Article type
Paper

Precipitation in aqueous lithium–oxygen batteries: a model-based analysis

B. Horstmann, T. Danner and W. G. Bessler, Energy Environ. Sci., 2013, 6, 1299
DOI: 10.1039/C3EE24299D

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