High-capacity antimony sulphide nanoparticle-decorated graphene composite as anode for sodium-ion batteries

Denis Y.W. Yu*, Petr V. Prikhodchenko, Chad W. Mason, Sudip K. Batabyal, Jenny Gun, Sergey Sladkevich, Alexander G. Medvedev, Ovadia Lev

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

447 Scopus citations

Abstract

Sodium-ion batteries are an alternative to lithium-ion batteries for large-scale applications. However, low capacity and poor rate capability of existing anodes are the main bottlenecks to future developments. Here we report a uniform coating of antimony sulphide (stibnite) on graphene, fabricated by a solution-based synthesis technique, as the anode material for sodium-ion batteries. It gives a high capacity of 730 mAh g -1 at 50 mA g -1, an excellent rate capability up to 6C and a good cycle performance. The promising performance is attributed to fast sodium ion diffusion from the small nanoparticles, and good electrical transport from the intimate contact between the active material and graphene, which also provides a template for anchoring the nanoparticles. We also demonstrate a battery with the stibnite-graphene composite that is free from sodium metal, having energy density up to 80 Wh kg -1. The energy density could exceed that of some lithium-ion batteries with further optimization.

Original languageAmerican English
Article number2922
JournalNature Communications
Volume4
DOIs
StatePublished - 10 Dec 2013

Bibliographical note

Funding Information:
This study was supported by the National Research Foundation of Singapore under the TUM CREATE Centre for Electromobility and the CREATE Center for Nanotechnology

Funding Information:
for Water and Energy Management and the Energy Research Institute at Nanyang Technological University, Singapore. The financial assistance of I-SAEF, Israel Strategic Alternative Energy Foundation is gratefully acknowledged. We thank Russian Foundation for Basic Research (grants 11-03-00551 and 14-03-00279).

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