• 文献标题:   Porous graphene current collectors filled with silicon as high-performance lithium battery anode
  • 文献类型:   Article
  • 作  者:   ABABTAIN K, BABU G, SUSARLA S, GULLAPALLI H, MASURKAR N, AJAYAN PM, ARAVA LMR
  • 作者关键词:   porous graphene, current collector, silicon electrode, lithiumion battery
  • 出版物名称:   MATERIALS RESEARCH EXPRESS
  • ISSN:   2053-1591
  • 通讯作者地址:   Wayne State Univ
  • 被引频次:   6
  • DOI:   10.1088/2053-1591/aaa0f9
  • 出版年:   2018

▎ 摘  要

Despite the massive success for high energy density, the charge-discharge current rate performance of the lithium-ion batteries are still a major concern owing to inherent sluggish Li-ion kinetics. Herein, we demonstrate three-dimensional porous electrodes engineered on highly conductive graphene current collectors to enhance the Li-ion conductivity, thereby c-rate performance. Such high-quality graphene provides surface area for loading a large amount of electrochemically active material and strong adhesion with the electrode. The synergism of porous structure and conductive current collector enables us to realize high-performance new-generation silicon anodes with a high energy density of 1.8 mAh cm(-2). Further, silicon electrodes revealed with excellent current rates up to 5C with a capacity of 0.37 mAh cm(-2) for 500 nm planar thickness.