The role of O2 in O-redox cathodes for Li-ion batteries
Robert A. House,
John-Joseph Marie,
Miguel A. Pérez-Osorio,
Gregory J. Rees,
Edouard Boivin and
Peter G. Bruce ()
Additional contact information
Robert A. House: University of Oxford
John-Joseph Marie: University of Oxford
Miguel A. Pérez-Osorio: University of Oxford
Gregory J. Rees: University of Oxford
Edouard Boivin: University of Oxford
Peter G. Bruce: University of Oxford
Nature Energy, 2021, vol. 6, issue 8, 781-789
Abstract:
Abstract The energy density of Li-ion batteries can be improved by storing charge at high voltages through the oxidation of oxide ions in the cathode material. However, oxidation of O2− triggers irreversible structural rearrangements in the bulk and an associated loss of the high voltage plateau, which is replaced by a lower discharge voltage, and a loss of O2 accompanied by densification at the surface. Here we consider various models for oxygen redox that are proposed in the literature and then describe a single unified model involving O2− oxidation to form O2, most of which is trapped in the bulk and the remainder of which evolves from the surface. The model extends the O2 formation and evolution at the surface, which is well known and well characterized, into the electrode particle bulk as caged O2 that can be reversibly reduced and oxidized. This converged understanding enables us to propose practical strategies to avoid oxygen-redox-induced instability and provide potential routes towards more reversible, high energy density Li-ion cathodes.
Date: 2021
References: Add references at CitEc
Citations: View citations in EconPapers (3)
Downloads: (external link)
https://www.nature.com/articles/s41560-021-00780-2 Abstract (text/html)
Access to the full text of the articles in this series is restricted.
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX
RIS (EndNote, ProCite, RefMan)
HTML/Text
Persistent link: https://EconPapers.repec.org/RePEc:nat:natene:v:6:y:2021:i:8:d:10.1038_s41560-021-00780-2
Ordering information: This journal article can be ordered from
https://www.nature.com/nenergy/
DOI: 10.1038/s41560-021-00780-2
Access Statistics for this article
Nature Energy is currently edited by Fouad Khan
More articles in Nature Energy from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().