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dc.contributor.authorYesibolati, Nulati
dc.contributor.authorShahid, Muhammad
dc.contributor.authorChen, Wei
dc.contributor.authorHedhili, Mohamed N.
dc.contributor.authorReuter, Mark C.
dc.contributor.authorRoss, Frances M.
dc.contributor.authorAlshareef, Husam N.
dc.date.accessioned2015-08-03T11:51:35Z
dc.date.available2015-08-03T11:51:35Z
dc.date.issued2014-03-14
dc.identifier.issn16136810
dc.identifier.doi10.1002/smll.201303898
dc.identifier.doi10.1002/smll.201470081
dc.identifier.urihttp://hdl.handle.net/10754/563442
dc.description.abstractFor the first time, it is demonstrated that nanoscale HfO2 surface passivation layers formed by atomic layer deposition (ALD) significantly improve the performance of Li ion batteries with SnO2-based anodes. Specifically, the measured battery capacity at a current density of 150 mAg -1 after 100 cycles is 548 and 853 mAhg-1 for the uncoated and HfO2-coated anodes, respectively. Material analysis reveals that the HfO2 layers are amorphous in nature and conformably coat the SnO2-based anodes. In addition, the analysis reveals that ALD HfO2 not only protects the SnO2-based anodes from irreversible reactions with the electrolyte and buffers its volume change, but also chemically interacts with the SnO2 anodes to increase battery capacity, despite the fact that HfO2 is itself electrochemically inactive. The amorphous nature of HfO2 is an important factor in explaining its behavior, as it still allows sufficient Li diffusion for an efficient anode lithiation/delithiation process to occur, leading to higher battery capacity. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
dc.description.sponsorshipThe authors wish to thank R. B. Rakhi for her support. HNA and FMR acknowledge the support from the KAUST-IBM grant.
dc.publisherWiley-VCH Verlag
dc.subjectanode material
dc.subjectatomic layer deposition
dc.subjectlithium ion battery
dc.titleSnO2 anode surface passivation by atomic layer deposited HfO2 improves li-ion battery performance
dc.typeArticle
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentCore Labs
dc.contributor.departmentFunctional Nanomaterials and Devices Research Group
dc.contributor.departmentImaging and Characterization Core Lab
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalSmall
dc.contributor.institutionIBM T.J. Watson Research Center, 1101 Kitchawan Road, Yorktown Heights, NY 10598, United States
kaust.personYesibolati, Nulati
kaust.personShahid, Muhammad
kaust.personHedhili, Mohamed N.
kaust.personAlshareef, Husam N.
kaust.personChen, Wei
dc.date.published-online2014-03-14
dc.date.published-print2014-07


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