Search: WFRF:(Pérez Osorio Miguel) >
Superstructure cont...
Superstructure control of first-cycle voltage hysteresis in oxygen-redox cathodes
-
- House, Robert A. (author)
- Univ Oxford, Dept Mat, Oxford, England
-
- Maitra, Urmimala (author)
- Univ Oxford, Dept Mat, Oxford, England
-
- Perez-Osorio, Miguel A. (author)
- Univ Oxford, Dept Mat, Oxford, England
-
show more...
-
- Lozano, Juan G. (author)
- Univ Oxford, Dept Mat, Oxford, England;Univ Seville, Escuela Tecn Super Ingn, Dept Ingn & Ciencia Mat & Transporte, Seville, Spain
-
- Jin, Liyu (author)
- Univ Oxford, Dept Mat, Oxford, England
-
- Somerville, James W. (author)
- Univ Oxford, Dept Mat, Oxford, England
-
- Duda, Laurent (author)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
-
- Nag, Abhishek (author)
- Diamond Light Source, Harwell, Berks, England
-
- Walters, Andrew (author)
- Diamond Light Source, Harwell, Berks, England
-
- Zhou, Ke-Jin (author)
- Diamond Light Source, Harwell, Berks, England
-
- Roberts, Matthew R. (author)
- Univ Oxford, Dept Mat, Oxford, England
-
- Bruce, Peter G. (author)
- Univ Oxford, Dept Mat, Oxford, England;Univ Oxford, Dept Chem, Oxford, England;Henry Royce Inst, Oxford, England;Faraday Inst, Didcot, Oxon, England
-
show less...
-
(creator_code:org_t)
- 2019-12-09
- 2020
- English.
-
In: Nature. - : NATURE PUBLISHING GROUP. - 0028-0836 .- 1476-4687. ; 577:7791, s. 502-508
- Related links:
-
https://urn.kb.se/re...
-
show more...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- In conventional intercalation cathodes, alkali metal ions can move in and out of a layered material with the charge being compensated for by reversible reduction and oxidation of the transition metal ions. If the cathode material used in a lithium-ion or sodium-ion battery is alkali-rich, this can increase the battery's energy density by storing charge on the oxide and the transition metal ions, rather than on the transition metal alone(1-10). There is a high voltage associated with oxidation of O2- during the first charge, but this is not recovered on discharge, resulting in reduced energy density(11). Displacement of transition metal ions into the alkali metal layers has been proposed to explain the first-cycle voltage loss (hysteresis)(9,12-16). By comparing two closely related intercalation cathodes, Na-0.75[Li0.25Mn0.75]O-2 and Na-0.6[Li0.2Mn0.8]O-2, here we show that the first-cycle voltage hysteresis is determined by the superstructure in the cathode, specifically the local ordering of lithium and transition metal ions in the transition metal layers. The honeycomb superstructure of Na-0.75[Li0.25Mn0.75]O-2, present in almost all oxygen-redox compounds, is lost on charging, driven in part by formation of molecular O-2 inside the solid. The O-2 molecules are cleaved on discharge, reforming O2-, but the manganese ions have migrated within the plane, changing the coordination around O2- and lowering the voltage on discharge. The ribbon superstructure in Na-0.6[Li0.2Mn0.8]O-2 inhibits manganese disorder and hence O-2 formation, suppressing hysteresis and promoting stable electron holes on O2- that are revealed by X-ray absorption spectroscopy. The results show that voltage hysteresis can be avoided in oxygen-redox cathodes by forming materials with a ribbon superstructure in the transition metal layers that suppresses migration of the transition metal. In oxygen-redox intercalation cathodes, voltage hysteresis can be avoided by forming cathode materials with a 'ribbon' superstructure in the transition metal layers that suppresses transition metal migration.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
-
Nature
(Search for host publication in LIBRIS)
To the university's database
- By the author/editor
-
House, Robert A.
-
Maitra, Urmimala
-
Perez-Osorio, Mi ...
-
Lozano, Juan G.
-
Jin, Liyu
-
Somerville, Jame ...
-
show more...
-
Duda, Laurent
-
Nag, Abhishek
-
Walters, Andrew
-
Zhou, Ke-Jin
-
Roberts, Matthew ...
-
Bruce, Peter G.
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Condensed Matter ...
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Chemical Science ...
-
and Materials Chemis ...
- Articles in the publication
-
Nature
- By the university
-
Uppsala University