Jump to main content
Jump to site search


Electrospun Cross-linked Carbon Nanofibers Film as Free-Standing and Binder-Free Anode with Superior Rate Performance and Long-Term Cyclic Stability for Sodium Ion Storage

Abstract

A cross-linking strategy is proposed to design electrospun carbon nanofibers film towards free-standing and binder-free electrodes with high sodium-ion storage performance. Based on this strategy, electrospun cross-linked carbon nanofibers (CL-CNFs) film are fabricated by polyvinylpyrrolidone solutions containing Cu(NO3)2. Formation of cross-linked structure should be ascribed to strongly coordination of PVP with Cu(NO3)2, which acts as a cross-linking agent. As-prepared CL-CNFs film is flexible, and average diameter of nanofibers can be facilely adjusted by controlling feeding rate. Remarkably, the CL-CNFs film demonstrates an excellent rate performance and long cycle stability when used as binder-free anode for SIBs, compared with CNFs film without cross-linked structure. At 50 mA g-1, the CL-CNFs film delivered a specific capacity of as high as 449 mA h g-1, which can rival the Na ion storage capacity for most of the reported electrospun nanofibers. At 5 and 10 A g-1, the CL-CNFs film deliver the initial reversible capacity of 148 and 121 mA h g-1, respectively, and still maintain 126 and 111 mA h g-1 after 500 cycles without obvious capacity fading. The excellent electrochemical properties of the CNFs film are attributed to the unique cross-linked structure that endows the CL-CNFs film fast electron transfer and ion diffusion kinetics as well as robust structural stability to bear repeated impact of Na ion during discharge/charge process. Therefore, this work opens a new strategy to design high performance carbon nanofibers as free-standing electrodes for flexible energy sodium-ion storage devices.

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Jun 2017, accepted on 11 Sep 2017 and first published on 11 Sep 2017


Article type: Paper
DOI: 10.1039/C7TA05621D
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
  •   Request permissions

    Electrospun Cross-linked Carbon Nanofibers Film as Free-Standing and Binder-Free Anode with Superior Rate Performance and Long-Term Cyclic Stability for Sodium Ion Storage

    X. Guo, X. Zhang, H. Song and J. Zhou, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA05621D

Search articles by author

Spotlight

Advertisements