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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 as the most auspicious candidate for the 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 persecute the LSBs. Herein, we employ the nanocage-like nitrogen-rich metal organic frameworks (MOF) derived carbon decorated with 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 sulfur species. FeSA-CN/S electrode could deliver a specific capacity of 1123 mAh g-1 at 0.2 C and exhibits an excellent rate performance of 605 mAh g-1 at 4.0 C with ultralow capacity fading rate of 0.06 % per cycle for 500 cycles. This work provides an effective strategy to couple the function of nanoporous materials host and single-atom catalyst for lithium sulfur batteries.

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Supplementary files

Article information


Submitted
23 Oct 2019
Accepted
13 Jan 2020
First published
14 Jan 2020

J. Mater. Chem. A, 2020, Accepted Manuscript
Article type
Paper

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, Accepted Manuscript , DOI: 10.1039/C9TA11680J

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