Sn4P3-Decorated 2D N-Doped Carbon Nanosheets as Efficient Polysulfide Barriers for Li-S Batteries

Abstract

A novel Sn₄P₃-decorated nitrogen-doped carbon nanosheet (Sn₄P₃@NCS) was engineered as a multifunctional separator for lithium-sulfur batteries (LSB). The high-surface-area NCS enables physical adsorption through van der Waals interactions, while the nitrogen dopants and Sn₄P₃ nanoparticles collectively ensure strong chemical interactions with lithium polysulfides (LiPSs) via polar coordination bonds, effectively mitigating the polysulfide shuttle effect. The resulting LSB with Sn₄P₃@NCS modified separator achieved outstanding electrochemical performance with a high initial discharge capacity of 1250 mAh g⁻¹ at 0.2 C, exceptional rate capability with a reversible capacity of 753.08 mAh g⁻¹ at an ultrahigh current density of 4 C, and high initial specific capacity of 1000.85 mAh g⁻¹ even under a high sulfur loading of 3.8 mg cm⁻² at 0.1 C.

Supplementary files

Article information

Article type
Communication
Submitted
25 Apr 2025
Accepted
02 Jun 2025
First published
04 Jun 2025

Chem. Commun., 2025, Accepted Manuscript

Sn4P3-Decorated 2D N-Doped Carbon Nanosheets as Efficient Polysulfide Barriers for Li-S Batteries

Y. Feng, S. Yu, X. Zhao, J. Xu, Z. Lin, C. Shi, C. Zhang, S. Chen and J. Song, Chem. Commun., 2025, Accepted Manuscript , DOI: 10.1039/D5CC02150B

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