Jump to main content
Jump to site search

Issue 19, 2017
Previous Article Next Article

Preparation of S/N-codoped carbon nanosheets with tunable interlayer distance for high-rate sodium-ion batteries

Author affiliations

Abstract

The conventional strategies for obtaining S/N-codoped carbon materials suffer from a series of problems caused by their complicated experimental procedures. Here, S,N-codoped carbon nanosheets were firstly prepared by a solvent-free one-pot method, displaying an ultra-thin sheet-like structure, a tunable interlayer distance ranging from 0.37 nm to 0.41 nm, and a large surface area up to 809 m2 g−1. When they were used as an anode for sodium-ion batteries (SIBs), an outstanding sodium-ion storage performance of 380 mA h g−1 was acquired at 100 mA g−1, which can be attributed to the expanded interlayer distance caused by the introduction of the large covalent radius-sulfur. The initial coulombic efficiency improved to 60.9%, which may benefit from N-doping. Most importantly, an excellent rate capability of ∼178 mA h g−1 was observed at a current density of 5 A g−1 after 5000 cycles, which is among best of the state-of-the-art carbon-based SIBs. Interestingly, the morphology of the obtained carbon materials can be tuned from bulk to flake by adjusting the sulfur content or temperature. Given this, this work provides a new method to construct co-doped carbon (especially tri-doped and multi-doped carbon) and shows that the strategy of co-doping of heteroatoms can effectively optimize the nano/microstructure and enhance the rate capability of the carbon materials.

Graphical abstract: Preparation of S/N-codoped carbon nanosheets with tunable interlayer distance for high-rate sodium-ion batteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 29 Jun 2017, accepted on 16 Aug 2017 and first published on 17 Aug 2017


Article type: Paper
DOI: 10.1039/C7GC01942D
Citation: Green Chem., 2017,19, 4622-4632
  •   Request permissions

    Preparation of S/N-codoped carbon nanosheets with tunable interlayer distance for high-rate sodium-ion batteries

    G. Zou, H. Hou, G. Zhao, Z. Huang, P. Ge and X. Ji, Green Chem., 2017, 19, 4622
    DOI: 10.1039/C7GC01942D

Search articles by author

Spotlight

Advertisements