Tuning Solid-State Reaction Pathways Using Molecular Sulfur Precursors to Synthesize FeS Anodes of Li-Ion Batteries for Boosted Electrochemical Performance

Xiaoyang Zhang, Mingxia Xu (), Jialiang Tian, Shaorong Cao, Botao Cao, Yongmei Bai, Xiaojie Hu, Cunfeng Yang, Jiliang Zhang () and Chuang Dong ()
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Xiaoyang Zhang: School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116021, China
Mingxia Xu: School of Electrical Engineering, Dalian Jiaotong University, Dalian 116021, China
Jialiang Tian: School of Electrical Engineering, Dalian Jiaotong University, Dalian 116021, China
Shaorong Cao: State Grid Gansu Electric Power Company Qingyang Power Supply Branch Company, Qingyang 745000, China
Botao Cao: State Grid Gansu Electric Power Company Qingyang Power Supply Branch Company, Qingyang 745000, China
Yongmei Bai: State Grid Gansu Electric Power Company Qingyang Power Supply Branch Company, Qingyang 745000, China
Xiaojie Hu: State Grid Gansu Electric Power Company Qingyang Power Supply Branch Company, Qingyang 745000, China
Cunfeng Yang: State Grid Gansu Electric Power Company Qingyang Power Supply Branch Company, Qingyang 745000, China
Jiliang Zhang: School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116021, China
Chuang Dong: School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116021, China

Energies, 2025, vol. 18, issue 17, 1-14

Abstract: The solid-state reactions between Fe 2 O 3 and molecular sulfur sources could produce FeS nanoparticles efficiently, while the functions of these molecules have been ignored except for the role as sulfur sources. In this work, thioacetamide and thiourea were employed as sulfur sources for the solid-state reactions with Fe 2 O 3 to explore their effects on the microstructure and electrochemical performance of the produced FeS. Despite the slight difference in one functional group for two molecules (−CH 3 against −NH 2 ), thiourea leads to a more complex reaction pathway with FeS 2 as the intermediate phase, while no such an intermediate phase is observed in the reaction with thioacetamide. The former yields FeS of 2D nanoflakes as the final products, compared with the aggregated nanoparticles in reactions with thiourea. As a result, the nanoflakes exhibit a higher discharge capacity with enhanced stability (388.9 mAh∙g −1 vs. 374.7 mAh∙g −1 above 1 V). According to the reaction pathways, the formation of FeS nanoflakes and superior electrochemical performance were addressed, paving a route for the solid-state reactions with molecules to develop high-performance sulfide electrode materials.

Keywords: thioacetamide; thiourea; FeS anode; Lithium-ion battery; solid-state reaction (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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