Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 134, Issue 6, Pages 2902-2905Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja2111543
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Funding
- NSERC
- National Research Council of Science & Technology (NST), Republic of Korea [2E2284] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 Li2O2 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.
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