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

Article information


Submitted
29 Jun 2017
Accepted
16 Aug 2017
First published
17 Aug 2017

Green Chem., 2017,19, 4622-4632
Article type
Paper

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

Social activity

Search articles by author

Spotlight

Advertisements