We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
A rechargeable room-temperature sodium superoxide (NaO<sub>2</sub>) battery.
- Authors
Hartmann, Pascal; Bender, Conrad L.; Vračar, Miloš; Dürr, Anna Katharina; Garsuch, Arnd; Janek, Jürgen; Adelhelm, Philipp
- Abstract
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-O2 cells (mostly with carbonate-based electrolytes and Li2O2 as a potential discharge product), where large overpotentials are observed and a complex cell chemistry is found. In fact, recent studies evidence that Li-O2 cells suffer from irreversible electrolyte decomposition during cycling. Here we report on a Na-O2 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 (NaO2) 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.
- Subjects
STORAGE batteries; SUPEROXIDES; ENERGY density; ATMOSPHERIC oxygen; ELECTRIC vehicle charging stations; CATHODES
- Publication
Nature Materials, 2013, Vol 12, Issue 3, p228
- ISSN
1476-1122
- Publication type
Article
- DOI
10.1038/nmat3486