• 文献标题:   Spherical graphene and Si nanoparticle composite particles for high-performance lithium batteries
  • 文献类型:   Article
  • 作  者:   LEE J, MOON J
  • 作者关键词:   silicon nanoparticle, reduced graphene oxide, lithium ion batterie
  • 出版物名称:   KOREAN JOURNAL OF CHEMICAL ENGINEERING
  • ISSN:   0256-1115 EI 1975-7220
  • 通讯作者地址:   Sogang Univ
  • 被引频次:   13
  • DOI:   10.1007/s11814-017-0226-7
  • 出版年:   2017

▎ 摘  要

Silicon/carbon composite electrodes are in the spotlight as an anode with a high capacity and a long cycle life. For this purpose, it is important to make a uniformly dispersed composite material. We fabricated spherical composite particles of reduced graphene oxide (rGO) and silicon nanoparticle (Si NP) using a spray drying method. The composite microparticle fabricated by drying the suspended droplets forms a well-agglomerated rGO/Si NP composite and forms a pore structure by crumpled rGO. The rGO/Si NP microparticles were applied as the anode of the lithium-ion battery. We achieved a reversible capacity of 1,246 mAh/g at 1A/g after 200 charge/discharge cycles and a capacity retention of 83%. Considering that the Si NP microparticle without rGO showed a capacity of 365 mAh/g and a retention of 12%, the rGO matrix improves the electrical conductivity and effectively alleviates stress during charge and discharge cycles.