The role of vacancies and defects in Na sub(0.44)MnO sub(2) nanowire catalysts for lithium-oxygen batteries

The role of vacancies and defects in Na sub(0.44)MnO sub(2) nanowire catalysts for lithium-oxygen batteries

Na sub(0.44)MnO sub(2) nanowires were acid leached in nitric acid, and dehydrated by heat treatment to induce controllable defect formation as monitored by high resolution TEM studies. The charge-discharge tests using these materials as catalysts (or "promoters") in rechargeable lithium-ox...

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Veröffentlicht in:Energy & environmental science 2012-10, Vol.5 (11), p.9558-9565
Hauptverfasser: Lee, Jin-Hyon, Black, Robert, Popov, Guerman, Pomerantseva, Ekaterina, Nan, Feihong, Botton, Gianluigi A, Nazar, Linda F
Format: Artikel
Sprache:eng
Schlagworte:
Batteries
Catalysis
Catalysts
Defects
Electric batteries
Nanomaterials
Nanowires
Vacancies
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container_end_page 9565
container_issue 11
container_start_page 9558
container_title Energy & environmental science
container_volume 5
creator Lee, Jin-Hyon
Black, Robert
Popov, Guerman
Pomerantseva, Ekaterina
Nan, Feihong
Botton, Gianluigi A
Nazar, Linda F
description Na sub(0.44)MnO sub(2) nanowires were acid leached in nitric acid, and dehydrated by heat treatment to induce controllable defect formation as monitored by high resolution TEM studies. The charge-discharge tests using these materials as catalysts (or "promoters") in rechargeable lithium-oxygen batteries (in non-carbonate electrolytes) showed that a high defect concentration results in a doubling of the reversible energy storage capacity up to 11 000 mA h g super(-1), and lowered overpotentials for oxygen evolution. The role of the defects/vacancies in determining oxygen reduction behavior is highlighted.
doi_str_mv 10.1039/c2ee21543h
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source Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection
subjects Batteries
Catalysis
Catalysts
Defects
Electric batteries
Nanomaterials
Nanowires
Vacancies
title The role of vacancies and defects in Na sub(0.44)MnO sub(2) nanowire catalysts for lithium-oxygen batteries
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