Real-Time XRD Studies of Li-O-2 Electrochemical Reaction in Nonaqueous Lithium-Oxygen Battery

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Understanding of electrochemical process in rechargeable Li-O-2 battery has suffered from lack of proper analytical tool, especially related to the identification of chemical species and number of electrons involved in the discharge/recharge process. Here we present a simple and straightforward analytical method for simultaneously attaining chemical and quantified information of Li2O2 (discharge product) and byproducts using in situ XRD measurement. By real-time monitoring of solid-state Li2O2 peak area, the accurate efficiency of Li2O2 formation and the number of electrons can be evaluated during full discharge. Furthermore, by observation of sequential area change of Li2O2 peak during recharge, we found nonlinearity of Li2O2 decomposition rate for the first time in ether-based electrolyte.
Publisher
AMER CHEMICAL SOC
Issue Date
2012-11
Language
English
Article Type
Article
Keywords

LI-AIR BATTERIES; CARBONATE ELECTROLYTES

Citation

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, v.3, no.21, pp.3210 - 3215

ISSN
1948-7185
DOI
10.1021/jz301453t
URI
http://hdl.handle.net/10203/207229
Appears in Collection
CH-Journal Papers(저널논문)
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