Details

Autor(en) / Beteiligte

• Jia, Shufeng
• Zhao, Shupeng
• Xu, Zijing
• Ma, Chuyin
• Yang, Tingzhou
• Pan, Lining
• Liu, Jiabing
• Wang, Yan
• Zhang, Tongbin
• Sun, Xia
• Liu, Ning
• Zhang, Yongguang
• Chen, Zhongwei

Titel

Niobium single-atom catalyst implanted three-dimensional ordered porous carbon nanofibers as an active sulfur host for efficient lithium-sulfur batteries

Ist Teil von

• Applied catalysis. B, Environmental, 2024-08, Vol.351, p.124012, Article 124012

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The lithium-sulfur (Li-S) battery is one of the most potential next-generation energy storage devices, but the insulating properties of the sulfur cathode, the detrimental shuttle effect of lithium polysulfide, and the volume change during cycling hinder their commercial viability. Herein, we report a uniquely designed sulfur host based on well-dispersed single Nb atom catalysts with 3D-ordered porous carbon nanofibers (Nb-SAs@3DOP-C) by a simple chemical polymerization method from porous anodic aluminum oxide templates. The 3D-ordered porous carbon nanofibers provide a physical barrier for the shuttle effect and an open framework to efficiently boost the utilization of sulfur species. Introducing single Nb atoms possess relatively higher binding energy for polysulfide intermediate, showing excellent charge transfer/kinetic toward sulfur redox. As a result, the S/Nb-SAs@3DOP-C composite delivers a satisfactory discharge capacity of 1208.1 mAh g−1 and an ultra-low capacity decay of 0.012% per cycle over 500 cycles. This work may provide new insights into single atom-decorated 3D porous materials for enhancing electrochemical performance of advanced Li-S battery for energy storage and conversion. [Display omitted] •Single Nb atoms scattered in wire-like 3D-ordered porous carbon nanofibers as an advanced sulfur host.•Nb-SAs@3DOP-C provides a rich porous structure and exhibits faster mass transfer properties.•The populated Nb-C3 coordinated moieties function promotes the redox kinetics of Li-S batteries.•The S/ Nb-SAs@3DOP-C achieves excellent electrochemical performance for pouch cells.