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On the Stability of NaO2 in Na–O2 Batteries
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry. (Ångström Advanced Battery Centre (ÅABC))ORCID iD: 0000-0002-8915-3032
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry. (Ångström Advanced Battery Centre (ÅABC))
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry. (Ångström Advanced Battery Centre (ÅABC))ORCID iD: 0000-0002-8658-8938
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström. (Ångström Advanced Battery Centre (ÅABC))
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2018 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 10, no 16, p. 13534-13541Article in journal (Refereed) Published
Abstract [en]

Na–O2 batteries are regarded as promising candidates for energy storage. They have higher energy efficiency, rate capability, and chemical reversibility than Li–O2 batteries; in addition, sodium is cheaper and more abundant compared to lithium. However, inconsistent observations and instability of discharge products have inhibited the understanding of the working mechanism of this technology. In this work, we have investigated a number of factors that influence the stability of the discharge products. By means of in operando powder X-ray diffraction study, the influence of oxygen, sodium anode, salt, solvent, and carbon cathode were investigated. The Na metal anode and an ether-based solvent are the main factors that lead to the instability and decomposition of NaO2 in the cell environment. This fundamental insight brings new information on the working mechanism of Na–O2 batteries.

Place, publisher, year, edition, pages
2018. Vol. 10, no 16, p. 13534-13541
Keywords [en]
metal-air battery, in operando X-ray diffraction, sodium superoxide, NaO2, decomposition
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-356097DOI: 10.1021/acsami.8b01516ISI: 000431150900032PubMedID: 29616791OAI: oai:DiVA.org:uu-356097DiVA, id: diva2:1233812
Funder
Swedish Research CouncilSwedish Energy AgencyStandUpÅForsk (Ångpanneföreningen's Foundation for Research and Development)Available from: 2018-07-19 Created: 2018-07-19 Last updated: 2018-10-05Bibliographically approved

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Liu, ChenjuanCarboni, MarcoBrant, WilliamPan, RuijunHedman, JonasZhu, JiefangGustafsson, TorbjörnYounesi, Reza

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Liu, ChenjuanCarboni, MarcoBrant, WilliamPan, RuijunHedman, JonasZhu, JiefangGustafsson, TorbjörnYounesi, Reza
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Structural ChemistryDepartment of Chemistry - Ångström
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