• 文献标题:   A cage compound precursor-derived Sb/Sb2O4/Fe3C nanocomposite anchored on reduced graphene oxide as an anode for potassium ion batteries
  • 文献类型:   Article
  • 作  者:   WANG JW, CAO MY, XU F, ZHU XL, RASHID K, WANG Y, HUANG L
  • 作者关键词:  
  • 出版物名称:   NEW JOURNAL OF CHEMISTRY
  • ISSN:   1144-0546 EI 1369-9261
  • 通讯作者地址:  
  • 被引频次:   6
  • DOI:   10.1039/d0nj05160h
  • 出版年:   2021

▎ 摘  要

The abundant reserves of potassium in the earth's crust and its low K/K+ redox potential (-2.93 V) make potassium ion batteries (PIBs) a potential candidate for next-generation ion batteries. Antimony (Sb) has a high theoretical specific capacity for PIBs, but the pulverization of Sb-based electrodes severely shortens their cycle lifetimes and hinders their use in PIBs. Here, a cage compound precursor-derived Sb/Sb2O4/Fe3C nanocomposite anchored on reduced graphene oxide with uniform distribution is fabricated and used as an anode for PIBs. Benefitting from the high capacity of Sb/Sb2O4 and the catalyst Fe3C that can promote the reversible dissolution of SEI film, the anode delivers a reversible specific capacity of 234 mA h g(-1) at 500 mA g(-1) over 280 cycles and a long-term cycling performance of 108 mA h g(-1) at 2000 mA g(-1) over 1244 cycles.