Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, PR China.
ACS Appl Mater Interfaces. 2012 May;4(5):2824-8. doi: 10.1021/am3005576. Epub 2012 May 14.
The utilization of silicon particles as anode materials for lithium-ion batteries is hindered by their low intrinsic electric conductivity and large volume changes during cycling. Here we report a novel Si nanoparticle-carbon nanoparticle/graphene composite, in which the addition of carbon nanoparticles can effectively alleviate the aggregation of Si nanoparticles by separating them from each other, and help graphene sheets build efficient 3D conducting networks for Si nanoparticles. Such Si-C/G composite shows much improved electrochemical properties in terms of specific capacity and cycling performance (ca. 1521 mA h g(-1) at 0.2 C after 200 cycles), as well as a favorable high-rate capability.
硅颗粒作为锂离子电池的阳极材料，由于其本征电导率低和循环过程中体积变化大，其应用受到限制。在此，我们报告了一种新型的硅纳米颗粒-碳纳米颗粒/石墨烯复合材料，其中添加的碳纳米颗粒可以通过彼此分离来有效减轻硅纳米颗粒的聚集，并帮助石墨烯片为硅纳米颗粒构建高效的 3D 导电网络。这种 Si-C/G 复合材料在比容量和循环性能（200 次循环后在 0.2 C 下约为 1521 mA h g(-1))方面表现出显著改善的电化学性能，以及良好的倍率性能。
