• 文献标题:   Thermal Reductive Perforation of Graphene Cathode for High-Performance Aluminum-Ion Batteries
  • 文献类型:   Article
  • 作  者:   KONG YQ, TANG C, HUANG XD, NANJUNDAN AK, ZOU J, DU AJ, YU CZ
  • 作者关键词:   aluminum #8208, ion batterie, cathode, graphene, nanoporous material
  • 出版物名称:   ADVANCED FUNCTIONAL MATERIALS
  • ISSN:   1616-301X EI 1616-3028
  • 通讯作者地址:  
  • 被引频次:   24
  • DOI:   10.1002/adfm.202010569 EA FEB 2021
  • 出版年:   2021

▎ 摘  要

Controlling the structure of graphene-based materials with improved ion intercalation and diffusivity is crucial for their applications, such as in aluminum-ion batteries (AIBs). Due to the large size of AlCl4- ions, graphene-based cathodes have specific capacities of approximate to 60 to 148 mAh g(-1), limiting the development of AIBs. A thermal reductive perforation (TRP) strategy is presented, which converts three-layer graphene nanosheets to surface-perforated graphene materials under mild temperature (400 degrees C). The thermal decomposition of block copolymers used in the TRP process generates active radicals to deplete oxygen and create graphene fragments. The resultant material has a three-layer feature, in-plane nanopores, >50% expanded interlayer spacing, and a low oxygen content comparable to graphene annealed at a high temperature of approximate to 3000 degrees C. When applied as an AIB cathode, it delivers a reversible capacity of 197 mAh g(-1) at a current density of 2 A g(-1) and reaches 92.5% of the theoretical capacity predicted by density-functional theory simulations.