Details

Autor(en) / Beteiligte

• ZHANGQUAN PENG
• FREUNBERGER, Stefan A
• YUHUI CHEN
• BRUCE, Peter G

Titel

A Reversible and Higher-Rate Li-O2 Battery

Ist Teil von

• Science, 2012-08, Vol.337 (6094), p.563-566

Ort / Verlag

Washington, DC: American Association for the Advancement of Science

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The rechargeable nonaqueous lithium-air (Li-O(2)) battery is receiving a great deal of interest because, theoretically, its specific energy far exceeds the best that can be achieved with lithium-ion cells. Operation of the rechargeable Li-O(2) battery depends critically on repeated and highly reversible formation/decomposition of lithium peroxide (Li(2)O(2)) at the cathode upon cycling. Here, we show that this process is possible with the use of a dimethyl sulfoxide electrolyte and a porous gold electrode (95% capacity retention from cycles 1 to 100), whereas previously only partial Li(2)O(2) formation/decomposition and limited cycling could occur. Furthermore, we present data indicating that the kinetics of Li(2)O(2) oxidation on charge is approximately 10 times faster than on carbon electrodes.