Heterostructure manipulation via in situ localized phase transformation for high-rate and highly durable lithium ion storage

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dc.contributor.authorHao, J.
dc.contributor.authorZhang, J.
dc.contributor.authorXia, G.
dc.contributor.authorLiu, Y.
dc.contributor.authorZheng, Y.
dc.contributor.authorZhang, W.
dc.contributor.authorTang, Y.
dc.contributor.authorPang, W.K.
dc.contributor.authorGuo, Z.
dc.date.issued2018
dc.description.abstractRecently, heterostructures have attracted much attention in widespread research fields. By tailoring the physicochemical properties of the two components, creating heterostructures endows composites with diverse functions due to the synergistic effects and interfacial interaction. Here, a simple in situ localized phase transformation method is proposed to transform the transition-metal oxide electrode materials into heterostructures. Taking molybdenum oxide as an example, quasi-core–shell MoO₃@MoO₂ heterostructures were successfully fabricated, which were uniformly anchored on reduced graphene oxide (rGO) for high-rate and highly durable lithium ion storage. The in situ introduction of the MoO₂ shell not only effectively enhances the electronic conductivity but also creates MoO₃@MoO₂ heterojunctions with abundant oxygen vacancies, which induces an inbuilt driving force at the interface, enhancing ion/electron transfer. In operando synchrotron X-ray powder diffraction has confirmed the excellent phase reversibility of the MoO₂ shell during charge/discharge cycling, which contributes to the excellent cycling stability of the MoO₃@MoO₂/rGO electrode (1208.9 mAh g⁻¹ remaining at 5 A g⁻¹ after 2000 cycles). This simple in situ heterostructure fabrication method provides a facile way to optimize electrode materials for high-performance lithium ion batteries and possibly other energy storage devices.
dc.description.statementofresponsibilityJunnan Hao, Jian Zhang, Guanglin Xia, Yajie Liu, Yang Zheng, Wenchao Zhang, Yongbing Tang, Wei Kong Pang, and Zaiping Guo
dc.identifier.citationACS Nano, 2018; 12(10):10430-10438
dc.identifier.doi10.1021/acsnano.8b06020
dc.identifier.issn1936-0851
dc.identifier.issn1936-086X
dc.identifier.orcidHao, J. [0000-0002-5777-7844]
dc.identifier.orcidGuo, Z. [0000-0003-3464-5301]
dc.identifier.urihttps://hdl.handle.net/2440/132779
dc.language.isoen
dc.publisherAmerican Chemical Society (ACS)
dc.relation.granthttp://purl.org/au-research/grants/arc/DP170102406
dc.relation.granthttp://purl.org/au-research/grants/arc/FT150100109
dc.rights© 2018 American Chemical Society
dc.source.urihttps://doi.org/10.1021/acsnano.8b06020
dc.subjectHeterostructure; in situ localized phase transformation; MoO₃@MoO₂; oxygen vacancies; interfacial interaction; DFT calculation; lithium ion batteries
dc.titleHeterostructure manipulation via in situ localized phase transformation for high-rate and highly durable lithium ion storage
dc.typeJournal article
pubs.publication-statusPublished

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