| A rechargeable room-temperature sodium superoxide (NaO(2)) battery. | |
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MedLine Citation:
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PMID: 23202372 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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In the search for room-temperature batteries with high energy densities, rechargeable metal-air (more precisely metal-oxygen) batteries are considered as particularly attractive owing to the simplicity of the underlying cell reaction at first glance. Atmospheric oxygen is used to form oxides during discharging, which-ideally-decompose reversibly during charging. Much work has been focused on aprotic Li-O(2) cells (mostly with carbonate-based electrolytes and Li(2)O(2) as a potential discharge product), where large overpotentials are observed and a complex cell chemistry is found. In fact, recent studies evidence that Li-O(2) cells suffer from irreversible electrolyte decomposition during cycling. Here we report on a Na-O(2) cell reversibly discharging/charging at very low overpotentials (< 200 mV) and current densities as high as 0.2 mA cm(-2) using a pure carbon cathode without an added catalyst. Crystalline sodium superoxide (NaO(2)) forms in a one-electron transfer step as a solid discharge product. This work demonstrates that substitution of lithium by sodium may offer an unexpected route towards rechargeable metal-air batteries. |
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Authors:
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Pascal Hartmann; Conrad L Bender; Miloš Vračar; Anna Katharina Dürr; Arnd Garsuch; Jürgen Janek; Philipp Adelhelm |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-12-02 |
Journal Detail:
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Title: Nature materials Volume: - ISSN: 1476-1122 ISO Abbreviation: Nat Mater Publication Date: 2012 Dec |
Date Detail:
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Created Date: 2012-12-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101155473 Medline TA: Nat Mater Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Physikalisch-Chemisches Institut, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 58, 35392 Gießen, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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