Porous hierarchical TiO2/MoS2/RGO nanoflowers as anode material for sodium ion batteries with high capacity and stability

Ma, Jingyun, Xing, Mengdi, Yin, Longwei, San Hui, Kwan ORCID: https://orcid.org/0000-0001-7089-7587 and Nam Hui, Kwun (2021) Porous hierarchical TiO2/MoS2/RGO nanoflowers as anode material for sodium ion batteries with high capacity and stability. Applied Surface Science, 536. ISSN 0169-4332

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To enhance the reversible capacity and cycle stability of MoS2 as anode materials for sodium ion batteries (SIBs), we constructed a hybrid architecture composed of MoS2 and TiO2 nanosheets, linking with reduced graphene oxide (RGO) to another TiO2/MoS2 to form a nanoflower structure. Owing to layered RGO coupled with TiO2/MoS2 hybrid, such a composite offered interconnected conductive channels to short shuttle path of Na+ ions and favorable transport kinetics under charge/discharge cycling. Moreover, this unique structure showed a porous and hierarchical architecture, which not only buffered volume changes but also provided more electrochemical active sites during insertion/deintercalation processes of Na ions. Outstanding electrochemical performances were identified by the component matching effect among TiO2, MoS2 and RGO with a three-dimensional (3D) interconnected network, exhibiting a good reversible capacity of 616 mA h g-1 after 100 cycles at 0.1 A g-1, an excellent rate capability of 250 mA h g-1 even at 5A g-1 and a long cycling stability of 460 mA h g-1 with a capacity fluctuation of 0.03% per cycle within 350 cycles at 1 A g-1.

Item Type: Article
Uncontrolled Keywords: component matching effect,cycling stability,interconnected network,sodium ion batteries,rgo,chemistry(all),condensed matter physics,physics and astronomy(all),surfaces and interfaces,surfaces, coatings and films ,/dk/atira/pure/subjectarea/asjc/1600
Faculty \ School: Faculty of Science > School of Engineering
UEA Research Groups: Faculty of Science > Research Groups > Emerging Technologies for Electric Vehicles (EV)
Faculty of Science > Research Groups > Energy Materials Laboratory
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Depositing User: LivePure Connector
Date Deposited: 09 Sep 2020 00:03
Last Modified: 21 Apr 2023 00:46
URI: https://ueaeprints.uea.ac.uk/id/eprint/76805
DOI: 10.1016/j.apsusc.2020.147735


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