Issue 18, 2016

Inexpensive colloidal SnSb nanoalloys as efficient anode materials for lithium- and sodium-ion batteries

Abstract

The quest for higher energy densities of lithium-ion batteries (LIBs) and emerging sodium-ion analogues (SIBs) has motivated an intense research effort toward novel electrode materials. We report a simple and inexpensive colloidal synthesis of SnSb nanocrystals (NCs) and demonstrate their utility as lithium- and sodium-ion anode materials. In particular, SnSb NC Li-ion anodes deliver capacities of ∼890 mA h g−1 for 100 cycles at a current density of 200 mA g−1 and show excellent rate capability, reaching 90% and 80% of the theoretical capacity at current densities of 1000 and 5000 mA g−1, respectively. Similarly, SnSb NCs show also outstanding Na-ion storage properties with only ∼5% capacity loss over 100 cycles at a rate of 5000 mA g−1. Full-cells can be constructed with SnSb anodes and state-of-the-art cathodes, achieving anodic capacities of 600 and 400 mA h g−1 with an average discharge voltage of 3.0 and 2.7 V for lithium- and sodium-ions, respectively.

Graphical abstract: Inexpensive colloidal SnSb nanoalloys as efficient anode materials for lithium- and sodium-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
23 Dec 2015
Accepted
20 Mar 2016
First published
21 Mar 2016
This article is Open Access
Creative Commons BY license

J. Mater. Chem. A, 2016,4, 7053-7059

Author version available

Inexpensive colloidal SnSb nanoalloys as efficient anode materials for lithium- and sodium-ion batteries

M. Walter, S. Doswald and M. V. Kovalenko, J. Mater. Chem. A, 2016, 4, 7053 DOI: 10.1039/C5TA10568D

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