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Quantifying oxygen distortions in lithium-rich transition-metal-oxide cathodes using ABF STEM

Abstract:

Lithium-rich cathodes can store excess charge beyond the transition metal redox capacity by participation of oxygen in reversible anionic redox reactions. Although these processes are crucial for achieving high energy densities, their structural origins are not yet fully understood. Here, we explore the use of annular bright-field (ABF) imaging in scanning transmission electron microscopy (STEM) to measure oxygen distortions in charged Li1.2Ni0.2Mn0.6O2. We show that ABF STEM data can provide...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1016/j.ultramic.2019.112914

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Institution:
University of Oxford
Division:
MPLS
Department:
Materials
Oxford college:
Kellogg College
Role:
Author
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Publisher:
Elsevier Publisher's website
Journal:
Ultramicroscopy Journal website
Volume:
210
Article number:
112914
Publication date:
2019-11-23
Acceptance date:
2019-11-22
DOI:
EISSN:
1879-2723
ISSN:
0304-3991
Pmid:
31811959
Source identifiers:
1077174
Language:
English
Keywords:
Pubs id:
pubs:1077174
UUID:
uuid:7a6934c7-c589-477f-86b5-c325d7d903c8
Local pid:
pubs:1077174
Deposit date:
2019-12-16

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