FeCoS2 polyhedral spherical nanoparticle decorated nitrogen doped hollow carbon nanofibers as high-performance self-supporting anodes for K-ion storage. Issue 42 (13th October 2022)

• Record Type: Journal Article
• Authors: Xu, Haoshan; Huang, Shuhong; Yang, Yang; Chen, Jintao; Liang, Lingxun; Zhang, Jun; Li, Ling; Zhao, Xiaohui; Zhang, Wenming
• Is Part Of: Dalton transactions. Volume 51:Issue 42(2022)
• Page Start: 16126
• Page End: 16134
• Publication Date: 2022-10-13
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2dt02832h
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Application of 3D self-supported FeCoS2 @N-HCNF nanocomposites as potassium ion battery anodes. Abstract : Herein, we present a freestanding and flexible 3D nanocomposite made of polyhedral spherical FeCoS2 and nitrogen-doped hollow carbon nanofibers (FeCoS2 @N-HCNFs) that is synthesized through coaxial electrospinning, high-temperature calcination, and a facile solvothermal process. As a binder-free anode composite for potassium-ion batteries (PIBs), FeCoS2 @N-HCNF presents a high specific discharge capacity on the first lap (701.2 mA h g −1 at 100 mA g −1 ) and superior cycling stability (132.6 mA h g −1 at 3200 mA g −1 after 600 cycles). The impressive electrochemical performance can be ascribed to the unique 3D structure, such as the enormous specific surface area of the mesoporous structure beneficial for K + transfer, the three-dimensional hollow carbon nanofiber scaffold enhances the structural stability, and polyhedral spherical FeCoS2 improves the overall specific capacity. According to the above description, the FeCoS2 @N-HCNF anode is a promising candidate for advanced potassium-ion batteries.