Hollow nanospheres constructed by ultrafine few-layered MoS2 partially with amorphous fragments homogeneously incorporated in N-doped amorphous carbon for enhanced lithium storage performance

Wanqing Wang; Le Xu; Peilin Zhang; Jiao-Jiao Zhou; Weiwei Wang; Xicheng Xu; Yang Yang; Wuxing Ji; Hualong Ding; Luyang Chen

doi:10.1016/j.jcis.2022.07.066

Hollow nanospheres constructed by ultrafine few-layered MoS₂ partially with amorphous fragments homogeneously incorporated in N-doped amorphous carbon for enhanced lithium storage performance

J Colloid Interface Sci. 2022 Dec:627:804-814. doi: 10.1016/j.jcis.2022.07.066. Epub 2022 Jul 21.

Authors

Affiliations

¹ Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
² Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China; State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics Chinese Academy of Sciences, Shanghai 200050, China.
³ Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China. Electronic address: chenly@ecust.edu.cn.

PMID: 35901560
DOI: 10.1016/j.jcis.2022.07.066

Abstract

The rational design of ultrathin and few-layered structures for three-dimensional MoS₂ nanospheres is crucial for achieving attractive lithium-ion batteries (LIBs). Herein, hollow nanospheres constructed by ultrafine and few-layered MoS₂ homogeneously incorporated in N-doped amorphous carbon (HUF-MoS₂/NC) have been successfully synthesized as high-performance anode for LIBs. Using Mo-glycerol spheres as templates and dopamine hydrochloride as coordination ligands, hollow Mo-glycerol-polydopamine precursors are formed with Mo-containing groups which are surrounded by organic carbon species. Consequently, the MoS₂ is confined to the nanoscale and grows partially amorphous fragments while being uniformly embedded in NC. This unique architecture can not only hinder the substantial restacking between MoS₂ interlayers, offering more active sites, but also vastly enhance the electrical conductivity and relieve the mechanical stress ascribed to volume changes. As a result, the HUF-MoS₂/NC composite anode exhibits excellent cyclic stability (980mAhg^-1 after 300 cycles at 0.2Ag^-1) and superior rate performance (498mAhg^-1 at 5.0Ag^-1) for LIBs.

Keywords: Amorphous fragments; Hollow nanostructure; Lithium-ion batteries; Nitrogen-doped amorphous carbon; Ultrafine few-layered MoS(2).