journal article·2016-08-10

New Insights into the Instability of Discharge Products in Na–O2 Batteries

Imanol Landa-Medrano, Ricardo Pinedo, Xuanxuan Bi, Idoia Ruiz de Larramendi, Luis Lezama, Jürgen Janek, Khalil Amine, Jun Lu, Teófilo Rojo

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Abstract

Sodium-oxygen batteries currently stimulate extensive research due to their high theoretical energy density and improved operational stability when compared to lithium-oxygen batteries. Cell stability, however, needs to be demonstrated also under resting conditions before future implementation of these batteries. In this work we analyze the effect of resting periods on the stability of the sodium superoxide (NaO2) discharge product. The instability of NaO2 in the cell environment is demonstrated leading to the evolution of oxygen during the resting period and the decrease of the cell efficiency. In addition, migration of the superoxide anion (O2(-)) in the electrolyte is observed and demonstrated to be an important factor affecting Coulombic efficiency.
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Research context

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Advanced Battery Technologies Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Departamento de Química Inorgánica, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, 48080 Bilbao, Spain

Institute of Physical Chemistry, Justus-Liebig-University Giessen Heinrich-Buff-Ring 17, 35392 Gießen, Germany

Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States

Department of Chemistry and Biochemistry, Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States

CIC Energigune, Albert Einstein 48, 01510 Miñano, Álava Spain

Funding

BASF · Office of Energy Efficiency and Renewable Energy · Eusko Jaurlaritza · Euskal Herriko Unibertsitatea · Ministerio de Educación y Ciencia · European Regional Development Fund

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