宁夏大学学报（自然科学版）2025，Vol.46Issue(3)：267-278,12.
Fe-Co3S4/SnS@CNTs@g-C3N4复合材料的制备及储钠性能
Preparation and Sodium-Ion Storage Properties of Fe-Co3S4/SnS@CNTs@g-C3N4 Composite Materials
摘要
Abstract
To address the issues of poor conductivity and capacity decay caused by volume expansion during cycling of transition metal sulfides(TMS)as anode materials for sodium-ion batteries,this study employs a synergistic strategy of Fe doping and dual carbon sources(carbon nanotubes,CNTs,and graphitic carbon nitride,g-C₃N₄)to fabricate Fe-Co₃S₄/SnS@CNTs@g-C₃N₄ composite materials.The Fe-CoSn(OH)₆ precur-sor was synthesized using a solution co-precipitation method,followed by hydrothermal sulfidation and high-temperature calcination to integrate Fe-doped TMS with the dual carbon network.Structural and performance analyses of Sample 1 were conducted using XRD,SEM,TEM,XPS,and electrochemical methods.The results showed that FeS₂,Co₃S₄,and SnS were uniformly embedded within a three-dimensional conductive framework constructed from CNTs and g-C₃N₄,effectively alleviating volume expansion of the electrode mate-rial and enhancing ion transport efficiency.When the mass ratio of CNTs to g-C3N4 was 1:3,Sample 1 exhib-ited optimal sodium storage performance,with capacity retention rates of 62.12％and 61.18％after 500 cycles at current densities of 0.20 and 0.50 A/g,respectively,and discharge capacities of 379.14 and 353.45 mA·h/g.At a high rate of 5.00 A/g,Sample 1 maintained a capacity of 284.70 mA·h/g,which recovered to 472.46 mA·h/g when the current density returned to 0.05 A/g.The synergistic optimization of the network signifi-cantly reduced charge transfer resistance and improved Na⁺ diffusion kinetics.These findings provide new insights for the design of stable anode materials for sodium-ion batteries.关键词
过渡金属硫化物(TMS)/碳纳米管/石墨相氮化碳/钠离子电池/负极Key words
transition metal sulfides/carbon nanotubes/g-C3N4/sodium-ion battery/anode分类
建筑与水利引用本文复制引用
杨云磊,马佳鑫,马天翼,张薇,赵钦,吴抒遥,孙颖..Fe-Co3S4/SnS@CNTs@g-C3N4复合材料的制备及储钠性能[J].宁夏大学学报（自然科学版）,2025,46(3):267-278,12.基金项目
国家自然科学基金企业联合基金重点项目(U24B20198) （U24B20198）
国家自然科学基金青年项目(22308139) （22308139）
辽宁省教育厅基本科研面上项目(JYTMS20230767) （JYTMS20230767）
