Visualization of O-O peroxo-like dimers in high-capacity layered oxides for Li-ion batteries

Lithium-ion (Li-ion) batteries that rely on cationic redox reactions are the primary energy source for portable electronics. One pathway toward greater energy density is through the use of Li-rich layered oxides. The capacity of this class of materials (>270 milliampere hours per gram) has been s...

Celý popis

Uloženo v:

Podrobná bibliografie
Vydáno v:	Science (American Association for the Advancement of Science) Ročník 350; číslo 6267; s. 1516 - 1521
Hlavní autoři:	McCalla, Eric, Abakumov, Artem M, Saubanère, Matthieu, Foix, Dominique, Berg, Erik J, Rousse, Gwenaelle, Doublet, Marie-Liesse, Gonbeau, Danielle, Novák, Petr, Van Tendeloo, Gustaaf, Dominko, Robert, Tarascon, Jean-Marie
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	United States 18.12.2015
ISSN:	1095-9203
On-line přístup:	Zjistit podrobnosti o přístupu
Tagy:	Přidat tag Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!

Popis
Shrnutí:	Lithium-ion (Li-ion) batteries that rely on cationic redox reactions are the primary energy source for portable electronics. One pathway toward greater energy density is through the use of Li-rich layered oxides. The capacity of this class of materials (>270 milliampere hours per gram) has been shown to be nested in anionic redox reactions, which are thought to form peroxo-like species. However, the oxygen-oxygen (O-O) bonding pattern has not been observed in previous studies, nor has there been a satisfactory explanation for the irreversible changes that occur during first delithiation. By using Li2IrO3 as a model compound, we visualize the O-O dimers via transmission electron microscopy and neutron diffraction. Our findings establish the fundamental relation between the anionic redox process and the evolution of the O-O bonding in layered oxides.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1095-9203
DOI:	10.1126/science.aac8260