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

Feilong Gong, Lifang Peng, Huanzheng Liu, Yonghui Zhang, Dianzeng Jia, Shaoming Fang, Feng Li, Dongming Li

Research output: Contribution to journalArticle

8 Scopus citations

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).

Original languageEnglish (US)
Pages (from-to)18498-18507
Number of pages10
JournalJournal of Materials Chemistry A
Volume6
Issue number38
DOIs
StatePublished - Jan 1 2018

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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