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J Am Chem Soc. 2012 Feb 15;134(6):2902-5. doi: 10.1021/ja2111543. Epub 2012 Feb 6.

Screening for superoxide reactivity in Li-O2 batteries: effect on Li2O2/LiOH crystallization.

Author information

1
Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada.

Abstract

Unraveling the fundamentals of Li-O(2) battery chemistry is crucial to develop practical cells with energy densities that could approach their high theoretical values. We report here a straightforward chemical approach that probes the outcome of the superoxide O(2)(-), thought to initiate the electrochemical processes in the cell. We show that this serves as a good measure of electrolyte and binder stability. Superoxide readily dehydrofluorinates polyvinylidene to give byproducts that react with catalysts to produce LiOH. The Li(2)O(2) product morphology is a function of these factors and can affect Li-O(2) cell performance. This methodology is widely applicable as a probe of other potential cell components.

PMID:
22283803
DOI:
10.1021/ja2111543

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