ZnAl-layered double hydroxides template-induced formation of ZnO/ZnSe heterostructures on the surface of coal-tar-pitchderived carbon for high-efficiency sodium storageOA
Developing high-performance anodes from low-cost industrial byproducts is crucial for advancing sodium-ion batteries.Herein,we report a zinc–aluminum layered double hydroxide(ZnAl-LDH)template-induced strategy for fabricating ZnO/ZnSe heterojunctions embedded within hierarchical porous carbon derived from coal tar pitch.The LDH serves as a dual functional structural template and pore-forming agent,enabling the in situ construction of intimately coupled ZnO/ZnSe–C interfaces.The designed ZnO/ZnSe heterostructure offers notable advantages:the heterojunction boosts charge transfer via interfacial contact between the two active components,while the mixed O^(2−)/Se^(2−)anion environment,combined with nanodispersed ZnO/ZnSe and the conductive carbon matrix,effectively enhances the reaction kinetics and mitigates volume strain.Consequently,the composite anode delivers a high reversible capacity of 637.5 mAh g^(−1) at 100 mA g^(−1) and retains 259.7 mAh g^(−1) after 1000 cycles at 5 A g^(−1).Kinetic analysis indicates that the superior rate performance is attributed to a dominant capacitive contribution(93.3%at 1.2 mV s−1).A full cell configured with an Na3V2(PO4)3 cathode demonstrates practical viability,retaining 147.5 mAh g^(−1) after 100 cycles.This work highlights the effectiveness of LDH-templated synthesis in constructing advanced heterostructure anodes for efficient sodium storage.
Yibo Zhao;Peihua Li;Rufeng Tian;Haochen Xie;Yalong Wang;Wanggang Zhang;Xiaohong Li;Jian Wang;Yiming Liu
College of Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,ChinaCollege of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,ChinaCollege of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,ChinaCollege of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,ChinaCollege of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,ChinaCollege of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,ChinaCollege of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,ChinaCollege of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,ChinaCollege of Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China School of Chemical Engineering and Technology,Taiyuan University of Science and Technology,Taiyuan 030024,China Shanxi Key Laboratory of Catalysis and Energy Coupling,Taiyuan University of Science and Technology,Taiyuan 030024,China
信息技术与安全科学
anode materialcoal tar pitchlayered double hydroxideheterostructureZnSesodium-ion battery
《Energy Materials and Devices》 2026 (2)
P.16-30,15
supporting from National Natural Science Foundation of China(Grant Nos.U25B201411,22075197 and 22278290)the Shanxi Provincial Central Guidance Fund for Local Science and Technology Development Projects(Grant No.YDZJSX2024D022)the Key Research and Development(R&D)Projects of Shanxi Province(Grant No.202102040201003).
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