{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T05:14:19Z","timestamp":1790054059464,"version":"4.0.1"},"reference-count":55,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T00:00:00Z","timestamp":1770768000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Program for Innovative Research Team (in Science and Technology) in University of Henan Province","award":["23IRTSTHN009"],"award-info":[{"award-number":["23IRTSTHN009"]}]},{"name":"Project of Science and Technology Department of Henan Province","award":["252102240092"],"award-info":[{"award-number":["252102240092"]}]},{"DOI":"10.13039\/501100006407","name":"Natural Science Foundation of Henan Province","doi-asserted-by":"crossref","award":["252300421725"],"award-info":[{"award-number":["252300421725"]}],"id":[{"id":"10.13039\/501100006407","id-type":"DOI","asserted-by":"crossref"}]},{"name":"Education Key Projects of Henan Provincial Department","award":["25A530008"],"award-info":[{"award-number":["25A530008"]}]},{"name":"Luoyang Science and Technology Development Plan Project","award":["2302038A"],"award-info":[{"award-number":["2302038A"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Heterointerface engineering, especially the construction of heterointerfaces based on two highly active components, is an effective strategy to enhance the sodium storage capacity and accelerate the reaction kinetics of transition metal chalcogenide anodes. Herein, a series of SA-CoFe-S composites composed of two highly active metal sulfides, Co3S4 and Fe7S8, were fabricated through in situ chelation effects coupled with a one-step sulfurization strategy. The optimized SA-CoFe(1:4)-S is composed of fine nanoparticles encapsulated by uniformly distributed S-doped carbon. This unique carbon confinement effect and nano-sized active particles can alleviate volume expansion, shorten the ion diffusion distance, and accelerate electron transfer. In addition, the strong electric-field effect and rich heterointerfaces generated by the heterostructure provide more active sites for sodium storage and accelerate the sodium storage kinetics. The relevant theoretical calculation outcomes further confirm that the heterointerfaces formed between Co3S4 and Fe7S8 can enhance the adsorption energy toward sodium ions and boost the electrical conductivity of the composite material. As an anode material for sodium-ion batteries, the initial discharge\/charge capacities were 723\/1010 mAh\u00b7g\u22121, exhibited at 1 A\u00b7g\u22121, and the coulombic efficiency (CE) corresponding to this current density was measured to be 71.6%. Even after 800 cycles, the reversible discharge specific capacity of the electrode can still reach 806 mAh\u00b7g\u22121 at 1 A\u00b7g\u22121. Additionally, at an elevated current density of 3 A\u00b7g\u22121, the electrode sustains stable cycling over 500 cycles, with its discharge capacity kept at 258 mAh\u00b7g\u22121 after the long-term cycling test.<\/jats:p>","DOI":"10.3390\/ma19040692","type":"journal-article","created":{"date-parts":[[2026,2,12]],"date-time":"2026-02-12T14:06:16Z","timestamp":1770905176000},"page":"692","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Construction of Highly Active Co3S4\/Fe7S8 Heterostructures Derived from Sodium Alginate for Enhanced Sodium Storage Performance"],"prefix":"10.3390","volume":"19","author":[{"given":"Haopo","family":"Li","sequence":"first","affiliation":[{"name":"School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ting","family":"Feng","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5608-6649","authenticated-orcid":false,"given":"Fang","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Energy and Chemical Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China"},{"name":"Henan Key Laboratory of Green Building Materials Manufacturing and Intelligent Equipment, Luoyang 471023, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuhe","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Energy and Chemical Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hao","family":"Song","sequence":"additional","affiliation":[{"name":"School of Energy and Chemical Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chengxin","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Energy and Chemical Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7983-423X","authenticated-orcid":false,"given":"Fengzhang","family":"Ren","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471000, China"},{"name":"State Key Laboratory of Light Superalloys, Luoyang 471023, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,2,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2500985","DOI":"10.1002\/smtd.202500985","article-title":"Interface engineering modulation of 3D layered Ti3C2Tx\/MoS1.5Se0.5 composite aerogel for advanced anode in sodium-ion batteries","volume":"10","author":"Jin","year":"2025","journal-title":"Small Methods"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"2400246","DOI":"10.1002\/aenm.202400246","article-title":"Yolk-shell structure and spin-polarized surface capacitance enable FeS stable and fast ion transport in sodium-ion batteries","volume":"14","author":"Han","year":"2024","journal-title":"Adv. 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