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Poster: Suppression of manganese dissolution from LiMn2O4 cathodes

Poster: Suppression of manganese dissolution from LiMn2O4 cathodes

Authors: Yonas Tesfamhret, Erik Berg and Reza Younesi
Title: Suppression of manganese dissolution from LiMn2O4 cathodes
Affiliation: Department of Chemistry-Ångström Laboratory, Uppsala University, Box 538, SE-75121 Uppsala, Sweden

Abstract

Mn dissolution is known as a major degradation mechanism for LiMn2O4 (LMO) cathodes. Herein, we used atomic layer deposition (ALD) method to form a surface coating of Al2O3 on LMO particles. The uniform and thickness controlled coating improves cycling performance by preventing electrolyte/electrode interfacial reactions and reduces the surface dissolution of Mn-ions into the electrolyte [1]. LiFePO4 (LFP) is chosen as the counter electrode as opposed to e.g. Li-metal or graphite. Using a high average potential counter electrode restricts the reduction of Mn-ions on the surface of the anode. Inductively coupled plasma optical emission spectroscopy (ICP-OES) based ex situ method is developed for determination of Mn-ions dissolved in to the electrolyte solution.

Reference:
[1] A. Bhandari, J. Bhattacharya, J. Electrochem. Soc. 2017, 164.

Full list of posters


Poster: Observing the solid-state formation of P2-NaxCo0.7Mn0.3O2
Poster: Operando X-Ray Diffraction of Lithium-Sulfur Batteries with Concurrent Resistance Measurement
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