锰铬硫化物/氮掺杂碳复合材料的制备及储锂性能研究综合实验设计

Comprehensive Experimental Design for the Preparation and Lithium Storage Performance of Manganese-Chromium Sulfide/Nitrogen-Doped Carbon Composite Materials

摘要: 采用退火法制备了锰铬硫化物/氮掺杂碳纳米复合材料(MnCr₂S₄@NC)。利用X射线单晶衍射仪、扫描电镜等进行材料结构表征，利用电化学工作站、充放电仪等进行储锂性能测试。研究表明，该材料具有稳定的分级多孔结构，比表面积大，活性位点多，导电性强，储锂性能优异。该综合化学实验涉及纳米材料制备、性能表征、锂离子电池组装及电化学性能测试多个环节，涵盖领域丰富，系统性强，以培养学生综合能力为中心，以提升综合素养为目标，从广度和深度方面，提升学生的综合实验能力和科研素养。

Abstract: A manganese‑chromium sulfide/nitrogen‑doped carbon nanocomposite (MnCr₂S₄@NC) was synthesized via a facile annealing strategy. The material structure was systematically characterized by X‑ray single‑crystal diffractometry and scanning electron microscopy, while lithium‑storage properties were evaluated through electrochemical workstation measurements and galvanostatic charge-discharge tests. The results demonstrate that the as‑prepared composite features a stable hierarchical porous architecture, offering a large specific surface area, abundant active sites, superior electronic conductivity, and excellent lithium storage performance. This comprehensive chemical experiment integrates multiple key procedures, including nanomaterial fabrication, structural characterization, Lithium-ion battery assembly, and electrochemical performance evaluation, thus encompassing a wide range of research domains with strong systematic integrity. Designed to center on the cultivation of students’ comprehensive experimental capabilities and the enhancement of their overall scientific literacy, this study significantly advances their integrated practical skills and research competence in both depth and breadth.