Synergistic CoNi alloy/N-doped carbon nanospheres as high-efficiency separator coatings for stable lithium-sulfur batteries

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

Materials Letters Pub Date : 2025-09-11 DOI:10.1016/j.matlet.2025.139494

Yanru Li , Dinan Yang , Lei Zheng , Haoqi Wang , Lin Ma , Jinzheng Yang , Yali Wang

引用次数: 0

Abstract

To address polysulfide shuttling and sluggish kinetics in Lithium-sulfur (Li-S) batteries, we developed CoNi alloy-decorated N-doped carbon nanospheres (CoNi-CNSs) via in-situ pyrolysis as efficient separator coatings. The material synergistically integrates catalytic CoNi nanoparticles with conductive N-doped carbon, delivering 1200.2 mAh g⁻¹ at 0.1 C and outstanding stability with a capacity decay of 0.069 % per cycle over 500 cycles at 0.5 C. This approach demonstrates a practical strategy for separator modification to enhance the performance of Li-S batteries.

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协同CoNi合金/ n掺杂碳纳米球作为稳定锂硫电池的高效隔膜涂层

为了解决锂硫（li -硫）电池中多硫化物穿梭和动力学缓慢的问题，我们通过原位热解开发了CoNi合金装饰的n掺杂碳纳米球（CoNi- cnss）作为高效的隔膜涂层。该材料将催化CoNi纳米颗粒与导电n掺杂碳协同集成，在0.1℃下提供1200.2 mAh g - 1，在0.5℃下500次循环时，每循环容量衰减0.069%，具有出色的稳定性。该方法证明了一种实用的隔膜改性策略，可以提高Li-S电池的性能。

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