Functionalized N-doped interconnected carbon nanofibers as an anode material for sodium-ion storage with excellent performance

• Published in: Carbon (New York) Vol. 55; pp. 328 - 334
• Main Authors: Wang, Zhaohui, Qie, Long, Yuan, Lixia, Zhang, Wuxing, Hu, Xianluo, Huang, Yunhui
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.04.2013; Elsevier
• Subjects: Anodes; Carbon; Carbon fibers; Cross-disciplinary physics: materials science; rheology; Density; Electrodes; Exact sciences and technology; High current; Materials science; Nanofibers; Nanoscale materials and structures: fabrication and characterization; Other topics in nanoscale materials and structures; Physics; Surface chemistry; Sodium ions; Carbon fibers; Chemical modification; Adsorption; Nanofiber; Electrode material; Nanostructured materials
• ISSN: 0008-6223; 1873-3891
• DOI: 10.1016/j.carbon.2012.12.072

The electrochemical performance of sodium-ion battery was improved by using functionalized interconnected N-doped carbon nanofibers (FN-CNFs) as the anode. The material was synthesized with polypyrrole as precursor by a simple method. The FN-CNF electrode exhibits excellent rate capability and cycling stability, delivering a capacity of 134.2mAhg−1 at a high current density of 200mAg−1 after 200 cycles and retains a capacity of 73mAhg−1 even at an extremely high current density of 20Ag−1. The superior performance can be attributed to N-doped sites and functionalized groups, which are capable of capturing sodium ions rapidly and reversibly through surface adsorption and surface redox reactions.