新型炭材料（中英文）2025，Vol.40Issue(5)：1113-1122,10.DOI:10.1016/S1872-5805(25)61001-8
双金属铁/钴硫化物异质结构复合材料的原位构建及其储钠性能
Structural engineering of a bimetallic iron-cobalt sulfide composite anode for superior sodium-ion battery performance
摘要
Abstract
Transition metal sulfides are considered promising anode materials for sodium-ion batteries(SIBs)due to their high theoretical capacity and low synthesis cost.However,is-sues such as poor cyclic stability and rate performance,arising from volume expansion and structural degradation,remain sig-nificant challenges.We report a novel FeS2/CoS2 heterostruc-ture embedded in a 3D carbon aerogel matrix(FeS2/CoS2@C)synthesized by a cross-linking and vulcanization process.The resulting core-shell structure,with bimetallic FeS2/CoS2 nano-particles encapsulated in a conductive carbon shell,effectively reduces the adverse effects of volume changes during sodiation/desodiation cycles.The 3D porous carbon network increases both ion and electron diffusion,while preventing agglomeration of the active material and maintaining interface integrity.The FeS2/CoS2@C composite has an outstanding electrochemical performance,including a high specific capacity of 725 mAh g-1 at 0.5 A g-1 and an exceptional rate capability of 572 mAh g-1 at 10 A g-1.It also has remarkable cycling stability with no signific-ant capacity decay over 1000 cycles at 5 A g-1.关键词
钠离子电池/负极/金属硫化物/高容量/电化学性能Key words
Sodium-ion battery/Anode/Metal sulfide/High capacity/Electrochemical performance引用本文复制引用
付正广,李南,邵鑫宇,洪敏,孙举涛..双金属铁/钴硫化物异质结构复合材料的原位构建及其储钠性能[J].新型炭材料（中英文）,2025,40(5):1113-1122,10.基金项目
This word was financially supported by the Nat-ural Science Foundation of Shandong Province(ZR2024MB108)and the National Natural Science Foundation of China(22409122). 山东省自然科学基金(ZR2024MB108)和国家自然科学基金(22409122)资助. （ZR2024MB108）
