Surface Passivation of MoO3 Nanorods by Atomic Layer Deposition Towards High Rate Durable Li Ion Battery Anodes

Handle URI:
http://hdl.handle.net/10754/556674
Title:
Surface Passivation of MoO3 Nanorods by Atomic Layer Deposition Towards High Rate Durable Li Ion Battery Anodes
Authors:
Ahmed, Bilal ( 0000-0002-6707-822X ) ; Shahid, Muhammad; Nagaraju, Doddahalli H.; Anjum, Dalaver H.; Hedhili, Mohamed N. ( 0000-0002-3624-036X ) ; Alshareef, Husam N. ( 0000-0001-5029-2142 )
Abstract:
We demonstrate an effective strategy to overcome the degradation of MoO3 nanorod anodes in Lithium (Li) ion batteries at high rate cycling. This is achieved by conformal nanoscale surface passivation of the MoO3 nanorods by HfO2 using atomic layer deposition (ALD). At high current density such as 1500 mA/g, the specific capacity of HfO2 coated MoO3 electrodes is 68% higher than bare MoO3 electrodes after 50 charge/discharge cycles. After 50 charge/discharge cycles, HfO2 coated MoO3 electrodes exhibited specific capacity of 657 mAh/g, on the other hand, bare MoO3 showed only 460 mAh/g. Furthermore, we observed that HfO2 coated MoO3 electrodes tend to stabilize faster than bare MoO3 electrodes because nanoscale HfO2 layer prevents structural degradation of MoO3 nanorods. Additionally, the growth temperature of MoO3 nanorods and the effect of HfO2 layer thickness was studied and found to be important parameters for optimum battery performance. The growth temperature defines the microstructural features and HfO2 layer thickness defines the diffusion coefficient of Li–ions through the passivation layer to the active material. Furthermore, ex–situ HRTEM, X–ray photoelectron spectroscopy (XPS), Raman spectroscopy and X–ray diffraction was carried out to explain the capacity retention mechanism after HfO2 coating.
KAUST Department:
Materials Science and Engineering Program
Citation:
Surface Passivation of MoO3 Nanorods by Atomic Layer Deposition Towards High Rate Durable Li Ion Battery Anodes 2015:150603155633004 ACS Applied Materials & Interfaces
Publisher:
American Chemical Society (ACS)
Journal:
ACS Applied Materials & Interfaces
Issue Date:
3-Jun-2015
DOI:
10.1021/acsami.5b03395
Type:
Article
ISSN:
1944-8244; 1944-8252
Additional Links:
http://pubs.acs.org/doi/abs/10.1021/acsami.5b03395
Appears in Collections:
Articles; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorAhmed, Bilalen
dc.contributor.authorShahid, Muhammaden
dc.contributor.authorNagaraju, Doddahalli H.en
dc.contributor.authorAnjum, Dalaver H.en
dc.contributor.authorHedhili, Mohamed N.en
dc.contributor.authorAlshareef, Husam N.en
dc.date.accessioned2015-06-10T11:45:02Zen
dc.date.available2015-06-10T11:45:02Zen
dc.date.issued2015-06-03en
dc.identifier.citationSurface Passivation of MoO3 Nanorods by Atomic Layer Deposition Towards High Rate Durable Li Ion Battery Anodes 2015:150603155633004 ACS Applied Materials & Interfacesen
dc.identifier.issn1944-8244en
dc.identifier.issn1944-8252en
dc.identifier.doi10.1021/acsami.5b03395en
dc.identifier.urihttp://hdl.handle.net/10754/556674en
dc.description.abstractWe demonstrate an effective strategy to overcome the degradation of MoO3 nanorod anodes in Lithium (Li) ion batteries at high rate cycling. This is achieved by conformal nanoscale surface passivation of the MoO3 nanorods by HfO2 using atomic layer deposition (ALD). At high current density such as 1500 mA/g, the specific capacity of HfO2 coated MoO3 electrodes is 68% higher than bare MoO3 electrodes after 50 charge/discharge cycles. After 50 charge/discharge cycles, HfO2 coated MoO3 electrodes exhibited specific capacity of 657 mAh/g, on the other hand, bare MoO3 showed only 460 mAh/g. Furthermore, we observed that HfO2 coated MoO3 electrodes tend to stabilize faster than bare MoO3 electrodes because nanoscale HfO2 layer prevents structural degradation of MoO3 nanorods. Additionally, the growth temperature of MoO3 nanorods and the effect of HfO2 layer thickness was studied and found to be important parameters for optimum battery performance. The growth temperature defines the microstructural features and HfO2 layer thickness defines the diffusion coefficient of Li–ions through the passivation layer to the active material. Furthermore, ex–situ HRTEM, X–ray photoelectron spectroscopy (XPS), Raman spectroscopy and X–ray diffraction was carried out to explain the capacity retention mechanism after HfO2 coating.en
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acsami.5b03395en
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, 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/acsami.5b03395.en
dc.titleSurface Passivation of MoO3 Nanorods by Atomic Layer Deposition Towards High Rate Durable Li Ion Battery Anodesen
dc.typeArticleen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.identifier.journalACS Applied Materials & Interfacesen
dc.eprint.versionPost-printen
kaust.authorShahid, Muhammaden
kaust.authorAnjum, Dalaver H.en
kaust.authorHedhili, Mohamed N.en
kaust.authorAlshareef, Husam N.en
kaust.authorAhmed, Bilalen
kaust.authorNagaraju, Doddahalli H.en
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