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3D core–shell MoS2 superspheres composed of oriented nanosheets with quasi molecular superlattices: mimicked embryo formation and Li-storage properties

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Abstract

Monodispersed 3D core–shell superspheres consisting of oriented MoS2 nanosheets have been successfully synthesized on the large scale with a one-pot approach combining soft- and self-templated methods. Specifically, MoOx (x = 2–3) nanoclusters and MoS2 layers first self-assemble together with (CTAB)2Sy (y = 1 or 2) to form solid hybrids, MoOx–MoS2@(CTAB)2Sy spheres at 160 °C, and most of the MoOx nanoclusters then convert to MoO2 and 2H-MoS2 at 180 and 200 °C, respectively. 3D core–shell superspheres can be finally constructed with 2H/1T-MoS2 nanosheets with abundant O-dopants and defects at 220 °C. The expanded d-spacings of the (002) crystal plane reveal the formation of quasi molecular superlattices for partially intercalating (CTAB)2S molecules into 2D MoS2 nanosheets. The dynamic composition and nano/microstructural evolution of the materials in a one-pot reaction demonstrates a mimicked embryo formation based on in situ anion-exchange. The 3D core–shell superspheres can be applied to assemble anodes for lithium ion batteries (LIBs) with excellent performance, after being coated with reduced graphene oxide (RGO).

Graphical abstract: 3D core–shell MoS2 superspheres composed of oriented nanosheets with quasi molecular superlattices: mimicked embryo formation and Li-storage properties

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Publication details

The article was received on 29 Jul 2018, accepted on 04 Sep 2018 and first published on 05 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA07165A
Citation: J. Mater. Chem. A, 2018, Advance Article
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    3D core–shell MoS2 superspheres composed of oriented nanosheets with quasi molecular superlattices: mimicked embryo formation and Li-storage properties

    F. Gong, L. Peng, H. Liu, Y. Zhang, D. Jia, S. Fang, F. Li and D. Li, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C8TA07165A

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