Electrochemical activation, voltage decay and hysteresis of Li-rich layered cathode probed by various cobalt content

Handle URI:
http://hdl.handle.net/10754/627056
Title:
Electrochemical activation, voltage decay and hysteresis of Li-rich layered cathode probed by various cobalt content
Authors:
Wu, Yingqiang; Xie, Leqiong; He, Xiangming; Zhuo, Linhai; Wang, Limin; Ming, Jun ( 0000-0001-9561-5718 )
Abstract:
The high capacity of Li-rich layered cathode materials have attracted great attention for the greater energy density lithium ion (Li-ion) batteries, but the understanding of knowledge associated with electrochemical behaviours are still needed to improve their performances further. In this study, different amount of Co content is designed in Li-rich layered compounds (0.5Li2MnO3·0.5LiMn0.5-xNi0.5-xCo2xO2, 0 ≤ x ≤ 0.2), and the stepwise electrochemical activation process is applied to explore the features. We discover that the substitution of Co3+ ions can accelerate the electrochemical activation of Li2MnO3 component, and the Co-doped compound delivers much higher capacities even they suffer an apparent voltage decay comparing to the Co-free one. Besides, a fast metal ions migration exists (e.g., from the metastable tetrahedral site to the lower energy cubic site) in initial dozens of cycles (e.g., 30 cycles at 0.1C); thereafter, they likely return to the original octahedral site, as demonstrated in the voltage decay and hysteresis analysis.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Wu Y, Xie L, He X, Zhuo L, Wang L, et al. (2018) Electrochemical activation, voltage decay and hysteresis of Li-rich layered cathode probed by various cobalt content. Electrochimica Acta. Available: http://dx.doi.org/10.1016/j.electacta.2018.01.181.
Publisher:
Elsevier BV
Journal:
Electrochimica Acta
Issue Date:
1-Feb-2018
DOI:
10.1016/j.electacta.2018.01.181
Type:
Article
ISSN:
0013-4686
Sponsors:
The research was supported by the State Key Laboratory of Rare Earth Resource Utilizations, Changchun Institute of Applied Chemistry, and Shandong Province Science and Technology Program (2014GGX102020). J. Ming is grateful for the support from the King Abdullah University of Science & Technology (KAUST).
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0013468618302287
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorWu, Yingqiangen
dc.contributor.authorXie, Leqiongen
dc.contributor.authorHe, Xiangmingen
dc.contributor.authorZhuo, Linhaien
dc.contributor.authorWang, Liminen
dc.contributor.authorMing, Junen
dc.date.accessioned2018-02-07T07:02:28Z-
dc.date.available2018-02-07T07:02:28Z-
dc.date.issued2018-02-01en
dc.identifier.citationWu Y, Xie L, He X, Zhuo L, Wang L, et al. (2018) Electrochemical activation, voltage decay and hysteresis of Li-rich layered cathode probed by various cobalt content. Electrochimica Acta. Available: http://dx.doi.org/10.1016/j.electacta.2018.01.181.en
dc.identifier.issn0013-4686en
dc.identifier.doi10.1016/j.electacta.2018.01.181en
dc.identifier.urihttp://hdl.handle.net/10754/627056-
dc.description.abstractThe high capacity of Li-rich layered cathode materials have attracted great attention for the greater energy density lithium ion (Li-ion) batteries, but the understanding of knowledge associated with electrochemical behaviours are still needed to improve their performances further. In this study, different amount of Co content is designed in Li-rich layered compounds (0.5Li2MnO3·0.5LiMn0.5-xNi0.5-xCo2xO2, 0 ≤ x ≤ 0.2), and the stepwise electrochemical activation process is applied to explore the features. We discover that the substitution of Co3+ ions can accelerate the electrochemical activation of Li2MnO3 component, and the Co-doped compound delivers much higher capacities even they suffer an apparent voltage decay comparing to the Co-free one. Besides, a fast metal ions migration exists (e.g., from the metastable tetrahedral site to the lower energy cubic site) in initial dozens of cycles (e.g., 30 cycles at 0.1C); thereafter, they likely return to the original octahedral site, as demonstrated in the voltage decay and hysteresis analysis.en
dc.description.sponsorshipThe research was supported by the State Key Laboratory of Rare Earth Resource Utilizations, Changchun Institute of Applied Chemistry, and Shandong Province Science and Technology Program (2014GGX102020). J. Ming is grateful for the support from the King Abdullah University of Science & Technology (KAUST).en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0013468618302287en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Electrochimica Acta. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Electrochimica Acta, 31 January 2018. DOI: 10.1016/j.electacta.2018.01.181. © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectCathodeen
dc.subjectLithium batteryen
dc.subjectCobalt-dopingen
dc.subjectElectrochemical activationen
dc.subjectVoltage decayen
dc.titleElectrochemical activation, voltage decay and hysteresis of Li-rich layered cathode probed by various cobalt contenten
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalElectrochimica Actaen
dc.eprint.versionPost-printen
dc.contributor.institutionHuadong Institute of Lithium-ion Battery, Zhangjiagang 215600, PR Chinaen
dc.contributor.institutionState Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR Chinaen
dc.contributor.institutionInstitute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR Chinaen
dc.contributor.institutionCollege of Chemistry and Chemical Engineering, Taishan University, Taian, 271021, PR Chinaen
kaust.authorMing, Junen
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