A cage compound precursor-derived Sb/Sb2O4/Fe3C nanocomposite anchored on reduced graphene oxide as an anode for potassium ion batteries. (24th December 2020)

• Record Type: Journal Article
• Authors: Wang, Jianwen; Cao, Mengyang; Xu, Feng; Zhu, Xiuli; Rashid, Khan; Wang, Yan; Huang, Lu
• Is Part Of: New journal of chemistry. Volume 45:Number 2(2021)
• Page Start: 993
• Page End: 1000
• Publication Date: 2020-12-24
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d0nj05160h
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A cage compound precursor-derived Sb/Sb2 O4 /Fe3 C nanocomposite anchored on reduced graphene oxide is fabricated and used as an anode for PIBs and delivers an outstanding electrochemistry performance. Abstract : 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/Sb2 O4 /Fe3 C 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/Sb2 O4 and the catalyst Fe3 C 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.