Achieving job-synergistic polysulfides adsorption-conversion within hollow structured MoS2/Co4S3/C heterojunction host for long-life lithium-sulfur batteries

Fangyuan Li; Yujie Wu; Yongxian Lin; Junhao Li; Yajie Sun; Haoxiong Nan; Ming Wu; Huafeng Dong; Kaixiang Shi; Quanbing Liu

doi:10.1016/j.jcis.2022.06.091

Achieving job-synergistic polysulfides adsorption-conversion within hollow structured MoS₂/Co₄S₃/C heterojunction host for long-life lithium-sulfur batteries

J Colloid Interface Sci. 2022 Nov 15:626:535-543. doi: 10.1016/j.jcis.2022.06.091. Epub 2022 Jun 24.

Authors

Fangyuan Li¹, Yujie Wu¹, Yongxian Lin¹, Junhao Li¹, Yajie Sun¹, Haoxiong Nan², Ming Wu¹, Huafeng Dong³, Kaixiang Shi⁴, Quanbing Liu⁵

Affiliations

¹ Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
² School of Science, Hainan University, Haikou 570228, China.
³ School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China.
⁴ Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: shikx@hotmail.com.
⁵ Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China; Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Rongjiang Laboratory), Jieyang 515200, China. Electronic address: liuqb@gdut.edu.cn.

PMID: 35809442
DOI: 10.1016/j.jcis.2022.06.091

Abstract

Lithium-sulfur batteries are considered one of the most promising next-generation energy storage devices owing to their ultrahigh theoretical energy density and environmental friendliness. However, the sluggish electrode reaction kinetics of the sulfur cathode and shuttle effects of lithium polysulfide (LiPSs) restrict their active material utilization and cycling stability. Herein, a hollow, free-standing MoS₂/Co₄S₃/C heterojunction was fabricated and employed as a cathode host for high-performance lithium-sulfur batteries (LSBs). The unique hollow nanostructured MoS₂/Co₄S₃/C can achieve job-synergistic polysulfide adsorption-conversion, in which the conductive nitrogen-doped carbon framework facilitates rapid electron/ion diffusion; polar Co₄S₃ species provide strong chemisorption capability and endow intrinsic catalytic sites towards LiPSs, and MoS₂ serves as a nanocrystal to accelerate the reaction dynamics. As a result, MoS₂/Co₄S₃/C/S exhibited high reversible specific capacities at 2C and was maintained at 394 mAh g^-1 after 1000 cycles, with a 0.04% capacity decay rate. Impressively, the high reversible specific capacities with high sulfur loading of 4.1 mg cm^-2 were maintained at 906.7 mAh g^-1.

Keywords: Host; Job-synergistic adsorption-conversion; Lithium–sulfur batteries; MoS(2)/Co(4)S(3)/C heterojunction.