In-situ-grown multidimensional Cu-doped Co1-xS2@MoS2 on N-doped carbon nanofibers as anode materials for high-performance alkali metal ion batteries

Baole Guan; Shao-Jie Yang; Shu-Hui Tian; Ting Sun; Peng-Fei Wang; Ting-Feng Yi

doi:10.1016/j.jcis.2023.07.002

In-situ-grown multidimensional Cu-doped Co_1-_xS₂@MoS₂ on N-doped carbon nanofibers as anode materials for high-performance alkali metal ion batteries

J Colloid Interface Sci. 2023 Nov 15;650(Pt A):369-380. doi: 10.1016/j.jcis.2023.07.002. Epub 2023 Jul 1.

Authors

Baole Guan¹, Shao-Jie Yang², Shu-Hui Tian², Ting Sun¹, Peng-Fei Wang², Ting-Feng Yi³

Affiliations

¹ Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China.
² Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China.
³ Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China; Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China. Electronic address: tfyihit@163.com.

PMID: 37413871
DOI: 10.1016/j.jcis.2023.07.002

Abstract

Transition metal sulfides with the high theoretical capacity and low cost have been considered as advanced anode candidate for alkali metal ion batteries, but suffered from unsatisfactory electrical conductivity and huge volume expansion. Herein, a multidimensional structure Cu-doped Co_1-_xS₂@MoS₂ in-situ-grown on N-doped carbon nanofibers (denoted as Cu-Co_1-_xS₂@MoS₂ NCNFs) have been elaborately constructed for the first time. The bimetallic zeolitic imidazolate framework CuCo-ZIFs were encapsulated in the one-dimensional (1D) NCNFs through an electrospinning route and then on which the two-dimensional (2D) MoS₂ nanosheets were in-situ grown via a hydrothermal process. The architecture of 1D NCNFs can effectively shorten ion diffusion path and enhance electrical conductivity. Besides, the formed heterointerface between MOF-derived binary metal sulfides and MoS₂ can provide extra active centers and accelerate reaction kinetics, which guarantee a superior reversibility. As expected, the resulting Cu-Co_1-_xS₂@MoS₂ NCNFs electrode delivers excellent specific capacity of Na-ion batteries (845.6 mAh/g at 0.1 A/g), Li-ion batteries (1145.7 mAh/g at 0.1 A/g), and K-ion batteries (474.3 mAh/g at 0.1 A/g). Therefore, this innovative design strategy will bring a meaningful prospect for developing high-performance multi-component metal sulfides electrode for alkali metal ion batteries.

Keywords: Alkali metal ion batteries; Cu doping; Electrospinning; Heterostructure; Multidimensional structure.