Issue 6, 2020

Iron single-atom catalyst anchored on nitrogen-rich MOF-derived carbon nanocage to accelerate polysulfide redox conversion for lithium sulfur batteries

Abstract

Lithium sulfur batteries (LSBs) have been strongly considered the most promising candidate for next-generation energy storage devices owing to their higher energy density. However, the dissolution of lithium polysulfides (LiPSs) and sluggish conversion kinetics during charge/discharge cycling impede the LSBs. Herein, we employed the nanocage-like nitrogen-rich metal organic framework (MOF)-derived carbon decorated with an iron single-atom (FeSA–CN) catalyst to trigger the surface-mediated reaction of LiPSs. The synergistic effect from the iron single atom (FeSA) and nitrogen-rich porous carbon significantly boost the reaction kinetics and utilization of the sulfur species. The FeSA–CN/S electrode delivered a specific capacity of 1123 mA h g−1 at 0.2C, and exhibited an excellent rate performance of 605 mA h g−1 at 4.0C with an ultralow capacity fading rate of 0.06% per cycle for 500 cycles. This work provides an effective strategy to couple the function of a nanoporous material host and single-atom catalyst for lithium sulfur batteries.

Graphical abstract: Iron single-atom catalyst anchored on nitrogen-rich MOF-derived carbon nanocage to accelerate polysulfide redox conversion for lithium sulfur batteries

Supplementary files

Article information

Article type
Paper
Submitted
23 10 2019
Accepted
13 1 2020
First published
14 1 2020

J. Mater. Chem. A, 2020,8, 3421-3430

Iron single-atom catalyst anchored on nitrogen-rich MOF-derived carbon nanocage to accelerate polysulfide redox conversion for lithium sulfur batteries

C. Wang, H. Song, C. Yu, Z. Ullah, Z. Guan, R. Chu, Y. Zhang, L. Zhao, Q. Li and L. Liu, J. Mater. Chem. A, 2020, 8, 3421 DOI: 10.1039/C9TA11680J

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