DC Field | Value | Language |
---|---|---|
dc.contributor.author | Wen, Rui | ko |
dc.contributor.author | Hong, Mi Sun | ko |
dc.contributor.author | Byon, Hye Ryung | ko |
dc.date.accessioned | 2016-05-12T03:04:26Z | - |
dc.date.available | 2016-05-12T03:04:26Z | - |
dc.date.created | 2016-02-17 | - |
dc.date.created | 2016-02-17 | - |
dc.date.created | 2016-02-17 | - |
dc.date.issued | 2013-07 | - |
dc.identifier.citation | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.135, no.29, pp.10870 - 10876 | - |
dc.identifier.issn | 0002-7863 | - |
dc.identifier.uri | http://hdl.handle.net/10203/207225 | - |
dc.description.abstract | Understanding the lithium oxygen (Li-O-2) electrochemical reaction is of importance to improve reaction kinetics, efficiency, and mitigate parasitic reactions, which links to the strategy of enhanced Li-O-2 battery performance. Many in situ and ex situ analyses have been reported to address chemical species of reduction intermediate and products, whereas details of the dynamic Li-O-2 reaction have not as yet been fully unraveled. For this purpose, visual imaging can provide straightforward evidence, formation and decomposition of products, during the Li-O-2 electrochemical reaction. Here, we present real-time and in situ views of the Li-O-2 reaction using electrochemical atomic force microscopy (EC-AFM). Details of the reaction process can be observed at nano-/micrometer scale on a highly oriented pyrolytic graphite (HOPG) electrode with lithium ion-containing tetraglyme, representative of the carbon cathode and ether-based electrolyte extensively employed in the Li-O-2 battery. Upon oxygen reduction reaction (ORR), rapid growth of nanoplates, having axial diameter of hundreds of nanometers, length of micrometers, and similar to 5 nm thickness, at a step edge of HOPG can be observed, which eventually forms a lithium peroxide (Li2O2) film. This Li2O2 film is decomposed during the oxygen evolution reaction (OER), for which the decomposition potential is related to a thickness. There is no evidence of byproduct analyzed by X-ray photoelectron spectroscopy (XPS) after first reduction and oxidation reaction. However, further cycles provide unintended products such as lithium carbonate (Li2CO2), lithium acetate, and fluorine-related species with irregular morphology due to the degradation of HOPG electrode, tetraglyme, and lithium salt. These observations provide the first visualization of Li-O-2 reaction process and morphological information of Li2O2, which can allow one to build strategies to prepare the optimum conditions for the Li-O-2 battery. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | LI-AIR BATTERIES | - |
dc.subject | LITHIUM-OXYGEN BATTERY | - |
dc.subject | KINETIC OVERPOTENTIALS | - |
dc.subject | SPECTROSCOPY | - |
dc.subject | PERFORMANCE | - |
dc.subject | CHALLENGES | - |
dc.subject | STABILITY | - |
dc.subject | CATALYSTS | - |
dc.subject | PRODUCTS | - |
dc.subject | SOLVENTS | - |
dc.title | In Situ AFM Imaging of Li-O-2 Electrochemical Reaction on Highly Oriented Pyrolytic Graphite with Ether-Based Electrolyte | - |
dc.type | Article | - |
dc.identifier.wosid | 000322432400041 | - |
dc.identifier.scopusid | 2-s2.0-84880781320 | - |
dc.type.rims | ART | - |
dc.citation.volume | 135 | - |
dc.citation.issue | 29 | - |
dc.citation.beginningpage | 10870 | - |
dc.citation.endingpage | 10876 | - |
dc.citation.publicationname | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | - |
dc.identifier.doi | 10.1021/ja405188g | - |
dc.contributor.localauthor | Byon, Hye Ryung | - |
dc.contributor.nonIdAuthor | Wen, Rui | - |
dc.contributor.nonIdAuthor | Hong, Mi Sun | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | LI-AIR BATTERIES | - |
dc.subject.keywordPlus | LITHIUM-OXYGEN BATTERY | - |
dc.subject.keywordPlus | KINETIC OVERPOTENTIALS | - |
dc.subject.keywordPlus | SPECTROSCOPY | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | CHALLENGES | - |
dc.subject.keywordPlus | STABILITY | - |
dc.subject.keywordPlus | CATALYSTS | - |
dc.subject.keywordPlus | PRODUCTS | - |
dc.subject.keywordPlus | SOLVENTS | - |
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