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dc.contributor.authorBhatti, Humaira S
dc.contributor.authorAnjum, Dalaver H.
dc.contributor.authorUllah, Shafiq
dc.contributor.authorAhmed, Bilal
dc.contributor.authorHabib, Amir
dc.contributor.authorKarim, Altaf
dc.contributor.authorHasanain, Syed Khurshid
dc.date.accessioned2016-04-26T13:46:22Z
dc.date.available2016-04-26T13:46:22Z
dc.date.issued2016-05-03
dc.identifier.citationElectrochemical Characteristics and Li+ Ion Intercalation Kinetics of Dual-phase Li4Ti5O12/Li2TiO3 Composite in Voltage Range of 0−3 V, 2016 The Journal of Physical Chemistry C
dc.identifier.issn1932-7447
dc.identifier.issn1932-7455
dc.identifier.doi10.1021/acs.jpcc.5b12114
dc.identifier.urihttp://hdl.handle.net/10754/607143
dc.description.abstractLi4Ti5O12, Li2TiO3 and dual-phase Li4Ti5O12/Li2TiO3 composite were prepared by sol-gel method with average particle size of 1 µm, 0.3 µm and 0.4 µm, respectively. Though Li2TiO3 is electrochemically inactive, the rate capability of Li4Ti5O12/Li2TiO3 is comparable to Li4Ti5O12 at different current rates. Li4Ti5O12/Li2TiO3 also shows good rate performance of 90 mA h g-1 at high rate of 10 C in voltage range of 1−3 V, attributable to increased interfaces in the composite. While Li4Ti5O12 delivers capacity retention of 88.6 % at 0.2 C over 50 cycles, Li4Ti5O12/Li2TiO3 exhibits no capacity fading at 0.2 C (40 cycles) and capacity retention of 98.45 % at 0.5 C (50 cycles). This highly stable cycling performance is attributed to the contribution of Li2TiO3 in preventing undesirable reaction of Li4Ti5O12 with the electrolyte during cycling. CV curves of Li4Ti5O12/Li2TiO3 in 0−3 V range exhibit two anodic peaks at 1.51 V and 0.7−0.0 V, indicating two modes of lithium intercalation into the lattice sites of active material. Owing to enhanced intercalation/de-intercalation kinetics in 0−3 V, composite electrode delivers superior rate performance of 203 mAh/g at 2.85 C and 140 mAh/g at 5.7 C with good reversible capacity retention over 100 cycles.
dc.language.isoen
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acs.jpcc.5b12114
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.5b12114.
dc.titleElectrochemical Characteristics and Li+ Ion Intercalation Kinetics of Dual-phase Li4Ti5O12/Li2TiO3 Composite in Voltage Range of 0−3 V
dc.typeArticle
dc.contributor.departmentAdvanced Nanofabrication Imaging and Characterization Core Lab
dc.contributor.departmentElectron Microscopy
dc.identifier.journalThe Journal of Physical Chemistry C
dc.eprint.versionPost-print
dc.contributor.institutionNational Centre for Physics, Quaid-i-Azam University Campus, Islamabad 44000, Pakistan
dc.contributor.institutionNational Engineering and Scientific Commission, Islamabad 44000 , Pakistan
dc.contributor.institutionDepartment of Advanced Energy Technology, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon, Republic of Korea 305-350
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personAnjum, Dalaver H.
refterms.dateFOA2017-04-20T00:00:00Z
dc.date.published-online2016-05-03
dc.date.published-print2016-05-12


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