Multifunctional Effect of Carbon Matrix with Sulfur Dopant Inspires Mixed Metal Sulfide as Freestanding Anode in Sodium-Ion Batteries

Peilin Zhang; Kang Huang; Siyu Zhu; Mingzhen Xiu; Xun Cao; Chen Huang; Yizhong Huang; Luyang Chen

doi:10.1002/smll.202405560

Multifunctional Effect of Carbon Matrix with Sulfur Dopant Inspires Mixed Metal Sulfide as Freestanding Anode in Sodium-Ion Batteries

Small. 2024 Nov 19:e2405560. doi: 10.1002/smll.202405560. Online ahead of print.

Authors

Peilin Zhang¹, Kang Huang², Siyu Zhu³, Mingzhen Xiu³, Xun Cao³, Chen Huang¹, Yizhong Huang³, Luyang Chen¹

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 School of Optical and Electronic Information, Suzhou City University, Suzhou, 215104, China.
³ School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.

PMID: 39558785
DOI: 10.1002/smll.202405560

Abstract

As active materials for large-radius Na⁺ storage, metal sulfide (MS) anodes still face several challenges, including poor intrinsic electric conductivity, severe volume change along with the shuttle and dissolution effects of discharge-produced polysulfides. In this work, the mixed nickel-manganese sulfides (NiMnS) in the morphology of uniform 2D ultrathin nanosheets are derived from layered metal-organic frameworks (MOFs), where the NiS-MnS heterojunction are accommodated in carbon matrix with S dopant (NiMnS/SC). Through experiments and density functional theory (DFT) simulations, it is revealed that the carbon matrix with S dopant has multifunctional effects on active NiMnS during the charge/discharge process, including conductive intermediary, electrochemical active site, physical barrier, and chemical adsorption. This work may promote the design of MS-based electrodes in SIBs and extend the application of carbon material with S dopant in Na-S batteries.

Keywords: 2D nanosheets; carbon matrix with S dopant; freestanding anode; layered MOFs; mixed metal sulfides; sodium‐ion battery.

Abstract

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