Issue 17, 2013
From the journal:

Nanoscale

In situ nitrogenated graphene–few-layer WS2 composites for fast and reversible Li+ storage†

Dongyun Chen,a   Ge Ji,a   Bo Ding,a   Yue Ma,a   Baihua Qu,a   Weixiang Chenb  and  Jim Yang Lee*a  

* Corresponding authors

a Department of Chemical and Biomolecular Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
E-mail: cheleejy@nus.edu.sg
Tel: +65 6516 2899

b Department of Chemistry, Zhejiang University, Hangzhou, China 310027

Abstract

Two-dimensional nanosheets can leverage on their open architecture to support facile insertion and removal of Li+ as lithium-ion battery electrode materials. In this study, two two-dimensional nanosheets with complementary functions, namely nitrogen-doped graphene and few-layer WS2, were integrated via a facile surfactant-assisted synthesis under hydrothermal conditions. The layer structure and morphology of the composites were confirmed by X-ray diffraction, scanning electron microscopy and high-resolution transmission microscopy. The effects of surfactant amount on the WS2 layer number were investigated and the performance of the layered composites as high energy density lithium-ion battery anodes was evaluated. The composite formed with a surfactant : tungsten precursor ratio of 1 : 1 delivered the best cyclability (average of only 0.08% capacity fade per cycle for 100 cycles) and good rate performance (80% capacity retention with a 50-fold increase in current density from 100 mA g−1 to 5000 mA g−1), and may find uses in power-oriented applications.

Graphical abstract: In situ nitrogenated graphene–few-layer WS2 composites for fast and reversible Li+ storage

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/C3NR02920D
Article type
Paper
Submitted
05 Jun 2013
Accepted
20 Jun 2013
First published
26 Jun 2013

Nanoscale, 2013,5, 7890-7896

Permissions

Request permissions

In situ nitrogenated graphene–few-layer WS2 composites for fast and reversible Li+ storage

D. Chen, G. Ji, B. Ding, Y. Ma, B. Qu, W. Chen and J. Y. Lee, Nanoscale, 2013, 5, 7890 DOI: 10.1039/C3NR02920D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements