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Importance of Super...
Importance of Superstructure in Stabilizing Oxygen Redox in P3-Na0.67Li0.2Mn0.8O2
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- Kim, Eun Jeong (författare)
- Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland.;Faraday Inst Quad One, Harwell Sci & Innovat Campus, Didcot OX11 0RA, Oxon, England.;ALISTORE ERI, F-80039 Amiens, France.
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- Maughan, Philip A. (författare)
- Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland.;Faraday Inst Quad One, Harwell Sci & Innovat Campus, Didcot OX11 0RA, Oxon, England.
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- Bassey, Euan N. (författare)
- Univ Cambridge, Dept Chem, Lensfield Rd, Cambridge CB2 1EW, England.
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- Clement, Raphaele J. (författare)
- Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA.;Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA.
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- Ma, Le Anh, 1992- (författare)
- Uppsala universitet,Strukturkemi,Ångström Advanced Battery Centre
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- Duda, Laurent (författare)
- Uppsala universitet,Energimaterialens fysik
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- Sehrawat, Divya (författare)
- UNSW Australia, Sch Chem, Sydney, NSW 2052, Australia.
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- Younesi, Reza (författare)
- Uppsala universitet,Strukturkemi,ALISTORE ERI, F-80039 Amiens, France.,Ångström Advanced Battery Centre
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- Sharma, Neeraj (författare)
- UNSW Australia, Sch Chem, Sydney, NSW 2052, Australia.
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- Grey, Clare P. (författare)
- Faraday Inst Quad One, Harwell Sci & Innovat Campus, Didcot OX11 0RA, Oxon, England.;ALISTORE ERI, F-80039 Amiens, France.;Univ Cambridge, Dept Chem, Lensfield Rd, Cambridge CB2 1EW, England.
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- Armstrong, A. Robert (författare)
- Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland.;Faraday Inst Quad One, Harwell Sci & Innovat Campus, Didcot OX11 0RA, Oxon, England.;ALISTORE ERI, F-80039 Amiens, France.
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Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland;Faraday Inst Quad One, Harwell Sci & Innovat Campus, Didcot OX11 0RA, Oxon, England.;ALISTORE ERI, F-80039 Amiens, France. Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland.;Faraday Inst Quad One, Harwell Sci & Innovat Campus, Didcot OX11 0RA, Oxon, England. (creator_code:org_t)
- 2021-12-10
- 2022
- Engelska.
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Ingår i: Advanced Energy Materials. - : John Wiley & Sons. - 1614-6832 .- 1614-6840. ; 12:3
- Relaterad länk:
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Activation of oxygen redox represents a promising strategy to enhance the energy density of positive electrode materials in both lithium and sodium-ion batteries. However, the large voltage hysteresis associated with oxidation of oxygen anions during the first charge represents a significant challenge. Here, P3-type Na0.67Li0.2Mn0.8O2 is reinvestigated and a ribbon superlattice is identified for the first time in P3-type materials. The ribbon superstructure is maintained over cycling with very minor unit cell volume changes in the bulk while Li ions migrate reversibly between the transition metal and Na layers at the atomic scale. In addition, a range of spectroscopic techniques reveal that a strongly hybridized Mn 3d-O 2p favors ligand-to-metal charge transfer, also described as a reductive coupling mechanism, to stabilize reversible oxygen redox. By preparing materials under three different synthetic conditions, the degree of ordering between Li and Mn is varied. The sample with the maximum cation ordering delivers the largest capacity regardless of the voltage windows applied. These findings highlight the importance of cationic ordering in the transition metal layers, which can be tuned by synthetic control to enhance anionic redox and hence energy density in rechargeable batteries.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- layered structures
- oxygen redox
- P3 structure
- sodium-ion batteries
- superstructures
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Kim, Eun Jeong
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Maughan, Philip ...
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Bassey, Euan N.
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Clement, Raphael ...
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Ma, Le Anh, 1992 ...
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Duda, Laurent
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visa fler...
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Sehrawat, Divya
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Younesi, Reza
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Sharma, Neeraj
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Grey, Clare P.
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Armstrong, A. Ro ...
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visa färre...
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Advanced Energy ...
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Uppsala universitet