摘要
为提高锂离子电池负极材料的性能,研究提出了一种基于刻蚀改性的纳米硅/石墨/沥青复合材料。实验结果显示,刻蚀改性纳米硅/石墨/沥青复合材料具有高石墨化程度,且成功去除了-NH_(2)基团。同时,刻蚀改性纳米硅/石墨/沥青复合材料中的Si颗粒分布均匀,聚集程度低。电化学测试结果表明,刻蚀改性纳米硅/石墨/沥青复合材料具备优异的循环稳定性,其电荷转移电阻显著低于其他纳米硅/石墨/沥青复合材料。此外,刻蚀改性纳米硅/石墨/沥青复合材料在0.47 V处的氧化峰更为明显,显示出更高的Si颗粒活性。上述结果表明,刻蚀改性能够有效提升材料的电化学性能,使其成为锂电池负极材料的有力候选。
In order to improve the performance of negative electrode materials for lithium-ion batteries,a nano silicon/graphite/asphalt composite material based on etching modification is proposed.The experimental results show that the etching modified nano silicon/graphite/asphalt composite material has a high degree of graphitization and successfully removes the-NH_(2) group.Meanwhile,the Si particles in the etched modified nano silicon/graphite/asphalt composite material are evenly distributed and have a low degree of aggregation.The electrochemical test results show that the etched modified nano silicon/graphite/asphalt composite material has excellent cycling stability,and its charge transfer resistance is significantly lower than other nano silicon/graphite/asphalt composite materials.In addition,the oxidation peak of the etched modified nano silicon/graphite/asphalt composite material is more pronounced at 0.47 V,indicating higher Si particle activity.The above results indicate that etching modification can effectively improve the electrochemical performance of materials,making them a strong candidate for lithium battery negative electrode materials.
作者
石慧娟
Shi Huijuan(Inner Mongolia Shanshan Technology Co.,Ltd.,Baotou Inner Mongolia 014030,China)
出处
《山西化工》
2026年第1期141-142,150,共3页
Shanxi Chemical Industry
关键词
石墨负极
锂电池
刻蚀改性
复合材料
graphite negative electrode
lithium batteries
etching modification
composite material
