File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: New Barium Vanadate BaxV2O5 (x ≈ 0.16) for Fast Lithium Intercalation: Lower Symmetry for Higher Flexibility and Electrochemical Durability

TitleNew Barium Vanadate BaxV2O5 (x ≈ 0.16) for Fast Lithium Intercalation: Lower Symmetry for Higher Flexibility and Electrochemical Durability
Authors
Keywordscrystal structures
kinetics
lithium-ion batteries
low structural symmetry
vanadates
Issue Date2019
PublisherWiley - VCH Verlag GmbH & Co. KGaA. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2366-9608
Citation
Small Methods, 2019, v. 4 n. 1, p. article no. 1900585 How to Cite?
AbstractNa0.33V2O5-type metal vanadates generally show better cycling stability than α-V2O5 as a cathode in Li-ion batteries, because they contain enough crystallographic voids that allow for lithium intercalation without significant structural deformation, but metal leaching upon cycling deteriorates their capacity retention. Here a new barium vanadate Ba0.16(1)V2O5 is reported that does not undergo Ba leaching during cycling and shows a great promise for fast Li intercalation. Sr0.15(1)V2O5 is isostructural to Na0.33V2O5 (space group C2/m), while Ba0.16(1)V2O5 adopts a new structure (space group P21/c), a derivative of Na0.33V2O5. The framework of Ba0.16(1)V2O5 consists of edge-shared VO6 octahedral layers and the VO5 pyramidal bridge, generating unidirectional tunnels. Unlike the in-plane arrangement of atoms in Sr0.15(1)V2O5, the nonplanar arrangement in Ba0.16(1)V2O5 makes the host framework more flexible and creates larger voids for Ba. Compared with the combination of displacement and intercalation mechanisms in the Sr0.15(1)V2O5 cathode, Li intercalation looks dominant in the Ba0.16(1)V2O5 cathode due to its increased flexibility. Hence, Ba0.16(1)V2O5 exhibits improved cycling stability compared to Sr0.15(1)V2O5, suggesting that lower symmetry leads to higher cyclic stability in the V2O5-related compounds. This study illustrates how guest cations can tune the structural symmetry to modulate the reaction mechanism of electrode materials toward superior performances.
Persistent Identifierhttp://hdl.handle.net/10722/291163
ISSN
2023 Impact Factor: 10.7
2023 SCImago Journal Rankings: 3.107
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhang, J-
dc.contributor.authorLI, H-
dc.contributor.authorLiao, C-
dc.contributor.authorLau, VWH-
dc.contributor.authorWong, KW-
dc.contributor.authorChang, CK-
dc.contributor.authorSheu, HS-
dc.contributor.authorShih, K-
dc.contributor.authorKang, YM-
dc.date.accessioned2020-11-07T13:53:05Z-
dc.date.available2020-11-07T13:53:05Z-
dc.date.issued2019-
dc.identifier.citationSmall Methods, 2019, v. 4 n. 1, p. article no. 1900585-
dc.identifier.issn2366-9608-
dc.identifier.urihttp://hdl.handle.net/10722/291163-
dc.description.abstractNa0.33V2O5-type metal vanadates generally show better cycling stability than α-V2O5 as a cathode in Li-ion batteries, because they contain enough crystallographic voids that allow for lithium intercalation without significant structural deformation, but metal leaching upon cycling deteriorates their capacity retention. Here a new barium vanadate Ba0.16(1)V2O5 is reported that does not undergo Ba leaching during cycling and shows a great promise for fast Li intercalation. Sr0.15(1)V2O5 is isostructural to Na0.33V2O5 (space group C2/m), while Ba0.16(1)V2O5 adopts a new structure (space group P21/c), a derivative of Na0.33V2O5. The framework of Ba0.16(1)V2O5 consists of edge-shared VO6 octahedral layers and the VO5 pyramidal bridge, generating unidirectional tunnels. Unlike the in-plane arrangement of atoms in Sr0.15(1)V2O5, the nonplanar arrangement in Ba0.16(1)V2O5 makes the host framework more flexible and creates larger voids for Ba. Compared with the combination of displacement and intercalation mechanisms in the Sr0.15(1)V2O5 cathode, Li intercalation looks dominant in the Ba0.16(1)V2O5 cathode due to its increased flexibility. Hence, Ba0.16(1)V2O5 exhibits improved cycling stability compared to Sr0.15(1)V2O5, suggesting that lower symmetry leads to higher cyclic stability in the V2O5-related compounds. This study illustrates how guest cations can tune the structural symmetry to modulate the reaction mechanism of electrode materials toward superior performances.-
dc.languageeng-
dc.publisherWiley - VCH Verlag GmbH & Co. KGaA. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2366-9608-
dc.relation.ispartofSmall Methods-
dc.rightsSubmitted (preprint) Version This is the pre-peer reviewed version of the following article: [FULL CITE], which has been published in final form at [Link to final article using the DOI]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. Accepted (peer-reviewed) Version This is the peer reviewed version of the following article: [FULL CITE], which has been published in final form at [Link to final article using the DOI]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.-
dc.subjectcrystal structures-
dc.subjectkinetics-
dc.subjectlithium-ion batteries-
dc.subjectlow structural symmetry-
dc.subjectvanadates-
dc.titleNew Barium Vanadate BaxV2O5 (x ≈ 0.16) for Fast Lithium Intercalation: Lower Symmetry for Higher Flexibility and Electrochemical Durability-
dc.typeArticle-
dc.identifier.emailLiao, C: liaocz@hku.hk-
dc.identifier.emailShih, K: kshih@hku.hk-
dc.identifier.authorityShih, K=rp00167-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/smtd.201900585-
dc.identifier.scopuseid_2-s2.0-85074840401-
dc.identifier.hkuros318659-
dc.identifier.volume4-
dc.identifier.issue1-
dc.identifier.spagearticle no. 1900585-
dc.identifier.epagearticle no. 1900585-
dc.identifier.isiWOS:000495492800001-
dc.publisher.placeGermany-
dc.identifier.issnl2366-9608-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats