摘要
【目的】合理设计和调控电极材料的微观结构是显著提升其电化学性能的基础。【方法】采用溶剂热-煅烧法,合成了具有一维棒状结构的FeMo_(2)S_(4),并将其用作锂离子电池的负极材料。【结果】研究发现,相比于无规则块体电极结构,FeMo_(2)S_(4)的一维棒状结构减少了离子/电子的传输距离,提高了反应动力学。此外,较大的比表面积提供了大量的电化学活性位点,进而提高储锂容量。电化学测试结果表明,FeMo_(2)S_(4)电极具有高比容量(在0.5 A/g的电流密度下,初始放电比容量和充电比容量分别为1201和976.2 mAh/g),具备良好的倍率性能和循环稳定性。【结论】该研究可为后续过渡金属硫化物负极材料的结构设计及调控提供借鉴和指导。
【Purposes】The rational design and regulation of the microstructure of electrode materials are the bases for significantly enhancing their electrochemical performance.【Methods】In this study,FeMo_(2)S_(4)with a one-dimensional rod-like structure was synthesized by a solvent heat-calcination method and used as an anode material for lithium-ion batteries.【Findings】Compared with the irregular structured bulk electrode,the one-dimensional rod structure of FeMo_(2)S_(4)reduces the ion/electron transport distance and improves the reaction kinetics.And the higher specific surface area provides abundant electrochemical active sites and increases the lithium storage capacity.The results show that the FeMo_(2)S_(4)electrode has a high specific capacity(the initial discharge specific capacity and charge specific capacity are 1201 and 976.2 mAh/g,respectively,at a current density of 0.5 A/g),good rate and cycling performance.【Conclusions】This study can provide guidance for the structural design and regulation of subsequent transition metal sul-fide anode materials.
作者
王洪全
任晶
韩建强
任瑞鹏
吕永康
WANG Hongquan;REN Jing;HAN Jianqiang;REN Ruipeng;LYU Yongkang(State Key Laboratory of Clean and Efficient Coal Utilization,Taiyuan University of Technology,Taiyuan 030024,China;College of Chemistry,Taiyuan University of Technology,Taiyuan 030024,China;School of Semiconductor and Physics,North University of China,Taiyuan 030051,China;Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering,Taiyuan 030032,China)
出处
《太原理工大学学报》
CAS
北大核心
2023年第6期1023-1029,共7页
Journal of Taiyuan University of Technology
基金
国家自然科学基金资助项目(52102289)
山西省基础研究计划项目(202103021224208)
山西浙大新材料与化工研究院研发项目(2021SX-FR001)。
