摘要
为了加强材料类专业学生对新能源汽车动力电池材料制备与应用的理解,本文围绕硅碳(Si-C)复合材料的制备工艺及电化学性能测试展开实验探究。硅基材料因具有较高的理论比容量,被认为是下一代高能量密度锂离子电池负极的理想候选材料,然而其在循环过程中存在的体积膨胀问题制约了实际应用。通过与碳材料复合,能够有效缓解体积变化,提升电池的循环稳定性。本实验采用刮刀涂布法制备Si-C负极极片,系统介绍了浆料配制、集流体处理、涂布工艺及极片干燥等关键步骤。随后系统研究Si-C电极的首圈充放电效率、倍率性能和长循环稳定性等关键电化学指标。通过对实验数据的分析,学生能够直观理解材料组成、结构与电化学性能之间的内在关联。本实验作为材料科学与工程专业实践教学的重要组成部分,将理论学习与实验操作有机结合,不仅使学生掌握锂离子电池极片制备与电池组装的基本技能,更重要的是培养其综合运用材料化学、电化学等知识分析和解决实际问题的能力。
To enhance the understanding of the preparation and application of power battery materials for new energy vehicles among materials science majors,an experimental investigation focused on the preparation process and electrochemical performance testing of silicon-carbon(Si-C)composite materials was conducted.Si-based materials were regarded as promising candidates for the next generation of high-energy-density lithium-ion battery anodes due to their high theoretical specific capacity.However,their practical application was hindered by significant volume expansion during cycling.By compounding Si with carbon materials,this volume change can be effectively mitigated,thereby improving the cycling stability of the battery.Si-C anode sheets were prepared using the doctor blade coating method.The key steps,including slurry preparation,current collector treatment,coating process and electrode drying,were systematically introduced.Subsequently,Si-C electrodes were evaluated in terms of key electrochemical indicators such as initial coulombic efficiency,rate capability and long-term cycling stability.Through analysis of the experimental data,students can intuitively understand the intrinsic relationship between material composition,structure and electrochemical performance.As an important component of practical teaching in materials science and engineering,theoretical knowledge with hands-on laboratory operations was integrated.It not only enabled students to acquire fundamental skills in the preparation of lithium-ion battery electrodes and cell assembly,but also cultivated their ability to comprehensively apply knowledge of materials chemistry and electrochemistry to analyze and solve practical problems.
作者
王振兴
刘翠茵
余凤
洪晓东
陈永
WANG Zhenxing;LIU Cuiyin;YU Feng;HONG Xiaodong;CHEN Yong(School of Materials and Energy,Foshan University,Guangdong Foshan 528225,China)
出处
《广州化工》
2025年第24期175-177,共3页
GuangZhou Chemical Industry
基金
国家自然科学基金青年基金(22209055)
中国博士后面上基金(2022M721330)。
关键词
实验教学
材料制备
Si-C
锂离子电池
experimental teaching
material preparation
Si-C
lithium-ion battery
