Visualization of O-O peroxo-like dimers in high-capacity layered oxides for Li-ion batteries - Archive ouverte HAL Access content directly
Journal Articles Science Year : 2015

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

(1, 2, 3, 4) , (5, 6) , (7, 1, 3) , (1, 3, 8) , (9) , (10, 4, 1) , (7, 1, 3) , (1, 11, 3) , (9) , (5) , (2) , (3, 1, 4)
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Gustaaf van Tendeloo
  • Function : Author
  • PersonId : 877073
Robert Dominko
  • Function : Author
  • PersonId : 945846

Abstract

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.
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Dates and versions

hal-01253767 , version 1 (18-11-2022)

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Attribution - NonCommercial - CC BY 4.0

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Eric Mccalla, Artem M Abakumov, Matthieu Saubanère, Dominique Foix, Erik J Berg, et al.. Visualization of O-O peroxo-like dimers in high-capacity layered oxides for Li-ion batteries. Science, 2015, 305 (6267), pp.1516-1521. ⟨10.1126/science.aac8260⟩. ⟨hal-01253767⟩
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