高性能锂离子电池用新型α-Si3N4纳米颗粒/纳米晶须杂化陶瓷涂层PE分离器

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

Materials Letters Pub Date : 2025-07-07 DOI:10.1016/j.matlet.2025.139069

Hang Xu , Xinran Hou , Zongming Pan , Zengyu Peng , Lili Jiang , Jian Jiang , Xiaomin Li , Chuanqiang Yin , Lang Zhou

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引用次数: 0

摘要

提高隔膜的高温稳定性和电解质润湿性对高性能锂离子电池至关重要。在本研究中，我们通过浸涂法制备了一种新型的氮化硅(Si3N4)/聚乙烯（PE）分离器，将α-Si3N4纳米颗粒和纳米晶须混合粉末涂覆在商用PE分离器上（简称PE- si3n4np - nw分离器）。与商用聚乙烯隔膜相比，PE-Si3N4NP-NW隔膜具有优越的热稳定性和电解质润湿性。使用PE-Si3N4NP-NW作为隔板的锂/LiFePO4电池在200次循环后的高容量保持率为90.22%，在8C时的比容量高达97.2 mAh g-1。这些优异的性能突出了这种创新分离器在动力电池和储能系统应用中的巨大潜力。

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A novel α-Si3N4 nanoparticles/nanowhiskers hybrid ceramic coating PE separators for high-performance lithium-ion batteries

Improving the high-temperature stability and electrolyte wettability of separators is critical for high-performance lithium-ion batteries. In this study, we successfully fabricated a novel silicon nitride (Si₃N₄)/polyethylene (PE) separator by coating a commercial PE separator with a hybrid powder of α-Si₃N₄ nanoparticles and nanowhiskers via the dip-coating method (referred to as PE-Si₃N_4NP-NW separator). PE-Si₃N_4NP-NW separator exhibited superior thermal stability and electrolyte wettability compared to commercial polyethylene separators. Li/LiFePO₄ batteries utilizing PE-Si₃N_4NP-NW as the separator demonstrated a high-capacity retention of 90.22% after 200 cycles and showed a high specific capacity of 97.2 mAh g^-1 at 8C. These outstanding properties highlight the promising potential of this innovative separator for applications in power batteries and energy storage systems.

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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