Issue 41, 2019

High yield electrochemical exfoliation synthesis of tin selenide quantum dots for high-performance lithium-ion batteries

Abstract

Tin selenide (SnSe) nanostructures hold great promise as an anode material in lithium-ion batteries (LIBs) due to their high storage capacity, rapid lithiation kinetics and long-term cycling stability. However, a scalable synthesis of SnSe nanostructures with a well-defined size remains a challenge in chemistry. Here, we report cathodic exfoliation of a bulk SnSe crystal for a high-yield (>90%) synthesis of sub-5 nm scale SnSe quantum dots (QDs). As-exfoliated SnSe QDs demonstrate a superior performance as the anode material for LIBs. Our results reveal that SnSe QDs not only accommodate the volume expansion/contraction during the reversible charging/discharging in LIBs but also increase the effective contact interface area between the nanostructured anode materials and electrolyte, leading to a high charging/discharging rate and superior cycling performance. Additionally, SnSe QD based LIBs exhibit a reversible capacity retention of 550 mA h gāˆ’1 and high coulombic efficiency approaching 100% after 1500 charging/discharging cycles at a current density of 0.5 A gāˆ’1.

Graphical abstract: High yield electrochemical exfoliation synthesis of tin selenide quantum dots for high-performance lithium-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
04 Mai 2019
Accepted
05 Jul 2019
First published
05 Jul 2019

J. Mater. Chem. A, 2019,7, 23958-23963

High yield electrochemical exfoliation synthesis of tin selenide quantum dots for high-performance lithium-ion batteries

J. Li, W. Liu, C. Chen, X. Zhao, Z. Qiu, H. Xu, F. Sheng, Q. Hu, Y. Zheng, M. Lin, S. J. Pennycook, C. Su and J. Lu, J. Mater. Chem. A, 2019, 7, 23958 DOI: 10.1039/C9TA04643G

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