A Reversible and Higher-Rate Li-O2 Battery

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

doi:10.1126/science.1223985

A Reversible and Higher-Rate Li-O₂Battery

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

Research output: Contribution to journal › Article › peer-review

1723 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 language	English
Pages (from-to)	563-566
Number of pages	4
Journal	Science
Volume	337
Issue number	6094
DOIs	https://doi.org/10.1126/science.1223985
Publication status	Published - 3 Aug 2012

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10.1126/science.1223985

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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. ",

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Y1 - 2012/8/3

N2 - 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.

AB - 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.

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A Reversible and Higher-Rate Li-O2 Battery

Abstract

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A Reversible and Higher-Rate Li-O₂Battery