3D core–shell MoS2 superspheres composed of oriented nanosheets with quasi molecular superlattices: mimicked embryo formation and Li-storage properties. Issue 38 (17th September 2018)

• Record Type: Journal Article
• Authors: Gong, Feilong; Peng, Lifang; Liu, Huanzheng; Zhang, Yonghui; Jia, Dianzeng; Fang, Shaoming; Li, Feng; Li, Dongming
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 38(2018)
• Page Start: 18498
• Page End: 18507
• Publication Date: 2018-09-17
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8ta07165a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : The dynamic composition structural evolution of materials demonstrates a mimicked embryo formation of 3D core–shell MoS2 superspheres for use in lithium ion batteries. 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, MoO x ( x = 2–3) nanoclusters and MoS2 layers first self-assemble together with (CTAB)2 S y ( y = 1 or 2) to form solid hybrids, MoO x –MoS2 @(CTAB)2 S y spheres at 160 °C, and most of the MoO x 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)2 S 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).