• 文献标题:   Microspheres integrating Ti2O3 nanocrystals, carbon matrix, and vertical graphene enable fast ion transport for fast-charging lithium-ion batteries
  • 文献类型:   Article
  • 作  者:   HAN MS, LI JY, YU J
  • 作者关键词:   ti2o3, vertical graphene, high energy density, fast charging, anode
  • 出版物名称:   JOURNAL OF ENERGY STORAGE
  • ISSN:  
  • 通讯作者地址:  
  • 被引频次:   8
  • DOI:   10.1016/j.est.2021.103179 EA SEP 2021
  • 出版年:   2021

▎ 摘  要

Developing fast-charging high-energy lithium-ion battery, with a charging time of 8-10 min, is highly urgent in upcoming applications but still is a challenge. Although various routes have been proposed, almost all the reports for high-rate anodes are simply investigated under non-industrial electrode conditions due to the lack of developed ion transport path. Herein, we develop a novel Ti2O3-based composite microspheres that Ti2O3 nanocrystals are uniformly distributed in carbon matrix followed by growing vertical graphene nanosheets on surface of microspheres. The surface-growth graphene, together with carbon matrix, construct a highly developed Li+ transport route in whole electrode, which endows the composite microspheres with fast charging/discharge behaviors under industrial electrode conditions (areal capacity loading of above 3.2 mAh cm(-2), amount of binder and conductive agents of below 4 wt%, and electrode density of above 1.6 g cm(-3)). In full cell, a high energy density of 80.4 Wh kg(-1) is achieved at a charge time of only 7.8 min at 5 C and retains 66.9% of energy density obtained at 0.1 C, which is among the top in previous reports on fast-charging high-energy lithium-ion batteries.