Accelerated Diffusion Kinetics in ZnTe/CoTe₂ Heterojunctions for High Rate Potassium Storage

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dc.contributor.authorZhang, C.
dc.contributor.authorLi, H.
dc.contributor.authorZeng, X.
dc.contributor.authorXi, S.
dc.contributor.authorWang, R.
dc.contributor.authorZhang, L.
dc.contributor.authorLiang, G.
dc.contributor.authorDavey, K.
dc.contributor.authorLiu, Y.
dc.contributor.authorZhang, L.
dc.contributor.authorZhang, S.
dc.contributor.authorGuo, Z.
dc.date.issued2022
dc.descriptionFirst published: 01 September 2022
dc.description.abstractPotassium-ion batteries hold practical potential for large-scale energy storage owing to their appealing cell voltage and cost-effective features. The development of anode materials with high rate capability and satisfactory cycle lifespan, however, is one of the key elements for exploiting this electrochemical energy storage system at practical levels. Here, a template-assisted strategy is reported for acquiring a bimetallic telluride heterostructure which is supported on N-doped carbon shell (ZnTe/CoTe2@NC) that promotes diffusion of K+ ions for rapid charge transfer. It is shown that in telluride heterojunctions, electron-rich Te sites and built-in electric fields contributed by electron transfer from ZnTe to CoTe2 concomitantly provide abundant cation adsorption sites and facilitate interfacial electron transport during potassiation/depotassiation. The relatively fine ZnTe/CoTe2 nanoparticles imparted by the heterojunction result in high structural stability, together with a highly reversible capacity up to 5000 cycles at 5 A g−1 . Moreover, using judiciously combined experiment and theoretical computation, it is demonstrated that the energy barrier for K+ diffusion in telluride heterojunctions is significantly lower than that in individual counterparts. This quantitative design for fast and durable charge transfer in telluride heterostructures can be of immediate benefit for the rational design of batteries for low-cost energy storage and conversion.
dc.description.statementofresponsibilityChaofeng Zhang, Hao Li, Xiaohui Zeng, Shibo Xi, Rui Wang, Longhai Zhang, Gemeng Liang, Kenneth Davey, Yuping Liu, Lin Zhang, Shilin Zhang, and Zaiping Guo
dc.identifier.citationAdvanced Energy Materials, 2022; 12(41):1-9
dc.identifier.doi10.1002/aenm.202202577
dc.identifier.issn1614-6832
dc.identifier.issn1614-6840
dc.identifier.orcidLiang, G. [0000-0002-2302-4932]
dc.identifier.orcidDavey, K. [0000-0002-7623-9320]
dc.identifier.orcidZhang, S. [0000-0002-3268-5708]
dc.identifier.orcidGuo, Z. [0000-0003-3464-5301]
dc.identifier.urihttps://hdl.handle.net/2440/136512
dc.language.isoen
dc.publisherWiley
dc.relation.granthttp://purl.org/au-research/grants/arc/DP210101486
dc.relation.granthttp://purl.org/au-research/grants/arc/FL210100050
dc.rights© 2022 The Authors. Advanced Energy Materials published by WileyVCH GmbH. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
dc.source.urihttps://doi.org/10.1002/aenm.202202577
dc.subjectanodes; built-in electric field; heterostructures; potassium-ion batteries; tellurides
dc.titleAccelerated Diffusion Kinetics in ZnTe/CoTe₂ Heterojunctions for High Rate Potassium Storage
dc.title.alternativeAccelerated Diffusion Kinetics in ZnTe/CoTe2 Heterojunctions for High Rate Potassium Storage
dc.typeJournal article
pubs.publication-statusPublished

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