Sulfur@N/P dual-doped porous carbon nanofibers as the cathode for potassium-sulfur batteries

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-07-12 DOI:10.1016/j.matlet.2025.139097

Yuyang Qin , Dandan Yu , Jingyun Mou , Guojie Liu , Xinman Tu , Linhe Li , Yonggen Jin , Lu Shi , Wenlong Song , Da Chen

引用次数: 0

Abstract

The free-standing sulfur@N/P dual-doped porous carbon nanofiber (S@NPC) composite was synthesized via electrospinning, followed by calcination and sulfur vapor infiltration. Based on this cathode, potassium-sulfur batteries exhibit remarkable electrochemical performance, including excellent cycling stability (500 cycles at 0.4 A g⁻¹_s), high-rate capacity (691.7 mAh g⁻¹_s at 4.0 A g⁻¹_s), and superior low temperature cyclability (405.3 mAh g⁻¹_s after 100 cycles at −20 ℃ under 0.08 A g⁻¹_s). The superior performance can be attributed to the synergistic effects of space confinement and covalent bonding between sulfur and the NPC matrix, as well as good electrode/electrolyte compatibility.

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Sulfur@N/P双掺杂多孔碳纳米纤维作为钾硫电池的阴极

采用静电纺丝法制备了独立的sulfur@N/P双掺杂多孔碳纳米纤维（S@NPC）复合材料，并进行了煅烧和硫蒸汽渗透。基于该阴极，钾硫电池表现出优异的电化学性能，包括优异的循环稳定性（在0.4 A g−1s下可循环500次）、高倍率容量（在4.0 A g−1s下可循环691.7 mAh g−1s）和优异的低温循环性能（在0.08 A g−1s下，在- 20℃下循环100次后可循环405.3 mAh g−1s）。这种优异的性能可归因于硫与NPC基质之间的空间约束和共价键的协同作用，以及良好的电极/电解质相容性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive