Morphology design and electronic configuration of MoSe2 anchored on TiO2 nanospheres for high energy density sodium-ion half/full batteries

Jia Guo; Quan Liu; Kaiyang Li; Xinhe Chen; Yubo Feng; Xiaxi Yao; Bo Wei; Jun Yang

doi:10.1016/j.jcis.2024.01.139

Morphology design and electronic configuration of MoSe₂ anchored on TiO₂ nanospheres for high energy density sodium-ion half/full batteries

J Colloid Interface Sci. 2024 Apr 15:660:943-952. doi: 10.1016/j.jcis.2024.01.139. Epub 2024 Jan 23.

Authors

Jia Guo¹, Quan Liu², Kaiyang Li³, Xinhe Chen³, Yubo Feng³, Xiaxi Yao³, Bo Wei⁴, Jun Yang⁵

Affiliations

¹ College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China; School of Materials Engineering, Jiangsu Key Laboratory of Advanced Functional Materials, Changshu Institute of Technology, Changshu, Jiangsu 215500, China.
² School of Materials Engineering, Jiangsu Key Laboratory of Advanced Functional Materials, Changshu Institute of Technology, Changshu, Jiangsu 215500, China. Electronic address: liuquan@cslg.edu.cn.
³ School of Materials Engineering, Jiangsu Key Laboratory of Advanced Functional Materials, Changshu Institute of Technology, Changshu, Jiangsu 215500, China.
⁴ School of Materials Engineering, Jiangsu Key Laboratory of Advanced Functional Materials, Changshu Institute of Technology, Changshu, Jiangsu 215500, China. Electronic address: weibo@cslg.edu.cn.
⁵ School of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China. Electronic address: iamjyang@just.edu.cn.

PMID: 38281475
DOI: 10.1016/j.jcis.2024.01.139

Abstract

Molybdenum selenide (MoSe₂) has shown potential sodium storage properties due to its large layer spacing (0.646 nm) and high theoretical capacity and narrow band gap. However, as the anode material of sodium ion batteries (SIBs), the MoSe₂'s performance is not ideal, especially due to the layer agglomeration and stacking caused by volume expansion and low intrinsic conductivity. Hence, morphology design and electronic configuration of MoSe₂ is proposed via building MoSe₂ nanosheets and auxiliary sulfur doping on the surface of the TiO₂ hollow nanosphere (S-MoSe₂@TiO₂). The hierarchical shaped S-MoSe₂@TiO₂ effectively overcomes the shortcomings of high surface energy and weak interlayer van der Waals force of MoSe₂. As anode for SIBs, S-MoSe₂@TiO₂ delivers enhanced cycling life and rate capability (308 mAh/g at 10 A/g after 1000 cycles) with the comparison of MoSe₂@TiO₂ or pure MoSe₂ and TiO₂. Such excellent sodium storage performance is due to the fast diffusion kinetics of Na⁺. When it is applied in sodium ion full batteries, the S-MoSe₂@TiO₂ anode based cell can reach a high energy density of 187.8 W h kg^-1 at 148.3 W kg^-1. The design of the new MoSe₂-based hybrid provides a novel scheme for the preparation of advanced anode in SIBs.

Keywords: Doping; Electron conductance; Energy density; Morphology design; Reaction kinetics; Sodium-ion batteries.