锂离子电池硅碳负极材料研发现状与发展趋势

Research and Development Status and Trend of Silicon Carbon Anode Materials for Lithium Ion Batteries

摘要: 本文介绍了锂离子电池硅碳负极材料的发展过程、研发现状和研发趋势。不同原料和不同方法复合的硅碳负极材料的电化学性能有较大差别，比容量从500 mAh/g左右到2000 mAh/g左右，循环40次后，容量保持率从47%到90%以上不等。提出了硅碳负极材料的研发趋势，研发过程中，应根据电池使用目标确定原材料和材料复合方法，另外应注意材料微观结构的均匀性和宏观结构的稳定性，以期解决硅材料的体积膨胀问题和导电性差问题。

Abstract: This paper introduces the development process, research and development status and develop-ment trend of silicon carbon anode materials for lithium-ion batteries. The electrochemical prop-erties of the silicon carbon anode materials with different materials and different methods are quite different. The specific capacity ranges from about 500 mAh/g to about 2000 mAh/g. After 40 cycles, the capacity retention rate ranges from 47% to more than 90%. The research and development trend of silicon carbon anode materials is put forward. In the research and development process, the raw materials and material composite methods should be determined according to the use goal of the battery. In addition, attention should be paid to the uniformity of the micro structure and the stability of the macro structure, so as to solve the problems of volume expansion and poor conductivity of silicon materials.