Issue 46, 2018

MOF-derived and nitrogen-doped ZnSe polyhedra encapsulated by reduced graphene oxide as the anode for lithium and sodium storage

Abstract

Transition metal chalcogenides (TMCs) reveal a bright prospect as high-performance electrode materials for lithium ion batteries (LIBs) and sodium ion batteries (SIBs). In this work, ZIF-8 derived nitrogen-doped ZnSe (N-ZnSe) polyhedra encapsulated by reduced graphene oxide (rGO) composites have been successfully fabricated via a carbonization–selenylation procedure. The optimized N-ZnSe@rGO delivers an ultrahigh capacity (836 mA h g−1 at 100 mA g−1) and displays ultrahigh stability (464 mA h g−1 at 2000 mA g−1 after 1000 cycles) as the anode in LIBs, while it shows a reversible capacity of 285 mA h g−1 after 500 cycles at 300 mA g−1 for SIBs. The unique N-doped ZnSe polyhedra can enhance the number of active sites for electrons and promote the conductivity of the active materials. Furthermore, the wrapped rGO networks can provide enough surface area and offer a conductive matrix to enhance charge transfer kinetics, preventing ZnSe from pulverizing and aggregating. The synthetic method can be extended to other MOF-based TMCs as Li/Na-storage anode materials.

Graphical abstract: MOF-derived and nitrogen-doped ZnSe polyhedra encapsulated by reduced graphene oxide as the anode for lithium and sodium storage

Supplementary files

Article information

Article type
Paper
Submitted
23 Sep 2018
Accepted
22 Okt 2018
First published
23 Okt 2018

J. Mater. Chem. A, 2018,6, 23621-23627

MOF-derived and nitrogen-doped ZnSe polyhedra encapsulated by reduced graphene oxide as the anode for lithium and sodium storage

X. Liu, Y. Liu, M. Feng and L. Fan, J. Mater. Chem. A, 2018, 6, 23621 DOI: 10.1039/C8TA09247H

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