Spherical Templating of CoSe2 Nanoparticle-Decorated MXenes for Lithium–Sulfur Batteries

Page view(s)
74
Checked on Jul 14, 2024
Spherical Templating of CoSe2 Nanoparticle-Decorated MXenes for Lithium–Sulfur Batteries
Title:
Spherical Templating of CoSe2 Nanoparticle-Decorated MXenes for Lithium–Sulfur Batteries
Journal Title:
Nano Letters
Publication Date:
31 October 2022
Citation:
Lieu, W. Y., Fang, D., Li, Y., Li, X. L., Lin, C., Thakur, A., Wyatt, B. C., Sun, S., Ghosh, T., Anasori, B., Ng, M.-F., Yang, H. Y., & Seh, Z. W. (2022). Spherical Templating of CoSe2 Nanoparticle-Decorated MXenes for Lithium–Sulfur Batteries. Nano Letters, 22(21), 8679–8687. https://doi.org/10.1021/acs.nanolett.2c03279
Abstract:
Two-dimensional MXenes produce competitive performances when incorporated into lithium–sulfur batteries (LSBs), solving key problems such as the poor electronic conductivity of sulfur and dissolution of its polysulfide intermediates. However, MXene nanosheets are known to easily aggregate and restack during electrode fabrication, filtration, or water removal, limiting their practical applicability. Furthermore, in complex electrocatalytic reactions like the multistep sulfur reduction process in LSBs, MXene alone is insufficient to ensure an optimal reaction pathway. In this work, we demonstrate for the first time a loose templating of sulfur spheres using Ti3C2Tx MXene nanosheets decorated with polymorphic CoSe2 nanoparticles. This work shows that the templating of sulfur spheres using nanoparticle-decorated MXene nanosheets can prevent nanosheet aggregation and exert a strong electrocatalytic effect, thereby enabling improved reaction kinetics and battery performance. The S@MXene-CoSe2 cathode demonstrated a long cycle life of 1000 cycles and a low capacity decay rate of 0.06% per cycle in LSBs.
License type:
Publisher Copyright
Funding Info:
This research is supported by core funding from: SERC
Grant Reference no. : NA

This research / project is supported by the Ministry of Education (MOE) - Academic Research Fund Tier 2
Grant Reference no. : MOE2019-T2-1-181
Description:
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.nanolett.2c03279
ISSN:
1530-6984
1530-6992
Files uploaded:

File Size Format Action
final-mxene-cose2-alt.pdf 1.16 MB PDF Open