陈宝贤;李喜飞;颜波;熊东彬;杨媚;李德军;孙学良;

• 1:天津师范大学物理与材料科学学院

摘要(Abstract)：

为了实现硅纳米颗粒与一维碳纳米纤维的高效复合,提高硅材料作为锂离子电池负极的电化学性能,通过同轴静电纺丝法构造了硅碳复合结构(Si/C-C)的一维纳米纤维作为锂离子电池的负极材料.通过SEM、TEM、XRD和电化学性能测试对其结构、形貌、成分和电化学性能等进行分析.结果表明:Si/C-C纳米复合纤维的平均直径为500~700 nm,硅含量为22%~33%;在100 m A/g的电流密度下,经100圈循环后其可逆容量维持在1 000 m Ah/g,表现出较佳的循环稳定性和较高的可逆比容量.研究表明,一维复合纳米纤维电化学性能的提升主要归因于硅碳复合结构中一维纳米纤维为硅提供了保护层,一方面有效抑制了硅的体积膨胀,另一方面提升了硅的电子导电性并有效缩短了离子迁移路径.

关键词(KeyWords)： Si/C-C纳米复合纤维;负极材料;锂离子电池;静电纺丝法;电化学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51572194)

作者(Author): 陈宝贤;李喜飞;颜波;熊东彬;杨媚;李德军;孙学良;

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DOI:

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