Sökning: onr:"swepub:oai:DiVA.org:uu-428400" >
Surface engineering...
-
Costa, Sara I. R.
(författare)
Surface engineering strategy using urea to improve the rate performance of Na2Ti3O7 in Na-ion batteries
- Artikel/kapitelEngelska2021
Förlag, utgivningsår, omfång ...
-
2021-01-14
-
John Wiley & Sons,2021
-
electronicrdacarrier
Nummerbeteckningar
-
LIBRIS-ID:oai:DiVA.org:uu-428400
-
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-428400URI
-
https://doi.org/10.1002/chem.202003129DOI
Kompletterande språkuppgifter
-
Språk:engelska
-
Sammanfattning på:engelska
Ingår i deldatabas
Klassifikation
-
Ämneskategori:ref swepub-contenttype
-
Ämneskategori:art swepub-publicationtype
Anmärkningar
-
Na2Ti3O7 (NTO) is considered a promising anode material for Na-ion batteries due to its layered structure with an open framework and low and safe average operating voltage of 0.3 V vs. Na+/Na. However, its poor electronic conductivity needs to be addressed to make this material attractive for practical applications among other anode choices. Here, we report a safe, controllable and affordable method using urea that significantly improves the rate performance of NTO by producing surface defects such as oxygen vacancies and hydroxyl groups, and the secondary phase Na2Ti6O13. The enhanced electrochemical performance agrees with the higher Na+ ion diffusion coefficient, higher charge carrier density and reduced bandgap observed in these samples, without the need of nanosizing and/or complex synthetic strategies. A comprehensive study using a combination of diffraction, microscopic, spectroscopic and electrochemical techniques supported by computational studies based on DFT calculations, was carried out to understand the effects of this treatment on the surface, chemistry and electronic and charge storage properties of NTO. This study underscores the benefits of using urea as a strategy for enhancing the charge storage properties of NTO and thus, unfolding the potential of this material in practical energy storage applications.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
-
Choi, Yong-Seok
(författare)
-
Fielding, Alistair J.
(författare)
-
Naylor, Andrew J.Uppsala universitet,Strukturkemi(Swepub:uu)andna283
(författare)
-
Griffin, John M.
(författare)
-
Sofer, Zdenek
(författare)
-
Scanlon, David O.
(författare)
-
Tapia-Ruiz, Nuria
(författare)
-
Uppsala universitetStrukturkemi
(creator_code:org_t)
Sammanhörande titlar
-
Ingår i:Chemistry - A European Journal: John Wiley & Sons27:11, s. 3875-38860947-65391521-3765
Internetlänk
Hitta via bibliotek
Till lärosätets databas