A Reversible and Higher-Rate Li-O2 Battery

Zhangquan Peng, Stefan A. Freunberger, Yuhui Chen, Peter G. Bruce

Research output: Contribution to journalArticlepeer-review

1427 Citations (Scopus)

Abstract

The rechargeable nonaqueous lithium-air (Li-O2) 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-O2 battery depends critically on repeated and highly reversible formation/decomposition of lithium peroxide (Li2O2) 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 Li2O2 formation/decomposition and limited cycling could occur. Furthermore, we present data indicating that the kinetics of Li2O2 oxidation on charge is approximately 10 times faster than on carbon electrodes.

Original languageEnglish
Pages (from-to)563-566
Number of pages4
JournalScience
Volume337
Issue number6094
DOIs
Publication statusPublished - 3 Aug 2012

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