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dc.contributor.authorZou, Yihui
dc.contributor.authorChang, Guojing
dc.contributor.authorChen, Shuai
dc.contributor.authorLiu, Tongchao
dc.contributor.authorXia, Yanzhi
dc.contributor.authorChen, Chengmeng
dc.contributor.authorYang, Dongjiang
dc.date.accessioned2019-06-08T01:41:00Z
dc.date.available2019-06-08T01:41:00Z
dc.date.issued2018
dc.identifier.issn1385-8947
dc.identifier.doi10.1016/j.cej.2018.06.104
dc.identifier.urihttp://hdl.handle.net/10072/379893
dc.description.abstractLi4Ti5O12/LiFePO4 (LTO/LFP) is a promising lithium ion batteries (LIBs) configuration due to its high safety and circularity. However, three factors result in the low capacity at high current density and low energy density in LTO/LFP: (i) low intrinsic electronic and ionic conductivities; (ii) long one-dimensional (1D) pathway along the [0 1 0] channel; (iii) Fe-Li antisite defect in LFP. It is still a great challenge to address the three problems simultaneously in LTO/LFP cell. Herein, we synthesized LFP ultrathin nanosheets (∼5–10 nm) with oriented (0 1 0) facet and ultralow Fe-Li antisite defects with the assistance of alginate and 2D reduced graphene oxide (LFP NS/r-GO). The novel “egg-box” structure in alginate is the key to restrain the Fe-Li antisites. The sandwich structure, which is formed by long range Van der Waals forces and hydrogen bond between the Li-Fe-P-alginate molecules and 2D r-GO nanosheets, results in the formation of ultrathin LFP NSs with oriented (0 1 0) facet. The density functional theory (DFT) calculations reveal that the tacking of LFP ultrathin NS with oriented (0 1 0) facet on the r-GO has a strong ability of Li+ ion deintercalation. When evaluating LFP NS/r-GO as cathode materials for LIBs, the sample displays outstanding rate capacity of 98.6 mA h g−1 at 100 C and its full cell with LTO anode achieves remarkable specific energy (265 W h kg−1) and power density (6.81 kW kg−1).
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.publisher.placeNetherlands
dc.relation.ispartofpagefrom340
dc.relation.ispartofpageto347
dc.relation.ispartofjournalChemical Engineering Journal
dc.relation.ispartofvolume351
dc.subject.fieldofresearchChemical engineering
dc.subject.fieldofresearchCivil engineering
dc.subject.fieldofresearchEnvironmental engineering
dc.subject.fieldofresearchEnvironmental engineering not elsewhere classified
dc.subject.fieldofresearchcode4004
dc.subject.fieldofresearchcode4005
dc.subject.fieldofresearchcode4011
dc.subject.fieldofresearchcode401199
dc.titleAlginate/r-GO assisted synthesis of ultrathin LiFePO4 nanosheets with oriented (0 1 0) facet and ultralow antisite defect
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2018 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
gro.hasfulltextFull Text
gro.griffith.authorYang, Dongjiang


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