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Title: Lithium Superoxide Hydrolysis and Relevance to Li–O2 Batteries

Journal Article · · Journal of Physical Chemistry. C

Fundamental understanding of reactions of lithium peroxides and superoxides is essential for the development of Li–O2 batteries. In this context, an investigation is reported of the hydrolysis of lithium superoxide, which has recently been synthesized in a Li–O2 battery. Surprisingly, the hydrolysis of solid LiO2 is significantly different from that of NaO2 and KO2. Unlike KO2 and NaO2, the hydrolysis of LiO2 does not produce H2O2. Similarly, the reactivity of Li2O2 toward water differs from LiO2, in that Li2O2 results in H2O2 as a product. The difference in the LiO2 reactivity with water is due to the more exothermic nature of the formation of LiOH and O2 compared with the corresponding reactions of NaO2 and KO2. Here, we also show that a titration method used in this study, based on reaction of the discharge product with a Ti(IV)OSO4 solution, provides a useful diagnostic technique to provide information on the composition of a discharge product in a Li–O2 battery.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1374608
Journal Information:
Journal of Physical Chemistry. C, Vol. 121, Issue 18; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

References (17)

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Cited By (3)

Vanadium(III) Acetylacetonate as an Efficient Soluble Catalyst for Lithium–Oxygen Batteries journal September 2019
Vanadium(III) Acetylacetonate as an Efficient Soluble Catalyst for Lithium–Oxygen Batteries journal July 2019
Defect Chemistry in Discharge Products of Li-O 2 Batteries journal November 2018

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