储能科学与技术2025，Vol.14Issue(9)：3269-3278,10.DOI:10.19799/j.cnki.2095-4239.2025.0055
柔性自支撑NiCo2S4@氮掺杂碳纳米纤维的制备及其储铝性能研究
Flexible free-standing NiCo2S4@N-doped carbon nanofiber composite cathode for rechargeable aluminum-ion batteries
摘要
Abstract
Rechargeable aluminum-ion batteries(AIBs)are regarded as promising next-generation electrochemical energy storage systems due to their high capacity,low cost,and enhanced safety.However,the development of high-performance cathode materials remains a critical challenge for the commercialization of AIBs.In this study,nitrogen-doped carbon nanofibers(N-CNFs)were synthesized via electrospinning and subsequent annealing,serving as substrates for a hydrothermal process to uniformly load bimetallic sulfide,resulting in a flexible,free-standing NiCo2S4@N-CNF composite.The composition,structure,and morphology were characterized by scanning electron microscopy,transmission electron microscopy,energy-dispersive spectroscopy(EDS),X-ray diffraction(XRD),and X-ray photoelectron spectroscopy.The NiCo2S4@N-CNF composite was directly employed as a cathode for AIBs,and its specific capacity,cycling stability,and rate performance were evaluated through constant current charge-discharge tests and cyclic voltammetry.The results demonstrate that the cauliflower-like NiCo2S4 is uniformly wrapped on the N-CNFs,forming a flexible,free-standing structure suitable for direct use as a cathode in AIBs.At a current density of 100 mA/g,the specific capacity reached 266.3 mA h/g,and after 200 cycles,it maintained a discharge capacity of 151.6 mAh/g,indicating excellent specific capacity and cycling stability.Moreover,in rate performance tests,the specific capacity recovered well after high current shocks,demonstrating good rate capability.Analysis of XRD patterns and valence state changes of Ni and Co during charge and discharge confirmed that the aluminum storage mechanism in NiCo2S4 involves the reversible intercalation and de-intercalation of Al3+ions facilitated by the bimetallic synergistic effect.This study provides theoretical guidance and a design reference for the development of high-performance cathode materials for AIBs.关键词
静电纺丝/氮掺杂碳纳米纤维/NiCo2S4/柔性自支撑/铝离子电池Key words
electrospinning/nitrogen-doped carbon nanofibers/NiCo2S4/flexible free-standing/aluminum-ion batterie分类
信息技术与安全科学引用本文复制引用
杨文文,刘建学,邓佳瑶..柔性自支撑NiCo2S4@氮掺杂碳纳米纤维的制备及其储铝性能研究[J].储能科学与技术,2025,14(9):3269-3278,10.基金项目
北京工业职业技术学院重点科研课题(BGY2020KY-22z). （BGY2020KY-22z）
