Enhancing Electrospun PVDF-HFP Nanofibres for Lithium-Ion Battery Separators Through the Incorporation of Inorganic Nanoparticles: Physico-Chemical and Electrical Characterisation

IF 3.8 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Leonardo Gasperini, Iacopo Iannarelli, Simone Vincenzo Suraci, Davide Fabiani
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引用次数: 0

Abstract

This study investigates the physical-chemical and electrochemical performances of innovative separators for Li-ion batteries based on poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) nanofibrous membranes. The nanofibrous mat is produced through the electrospinning process, ensuring high surface to volume (S/V) ratio and allows large-scale production under suitable conditions. The materials investigated in this work aim at overcoming some limitations specific to the commercial separators, for example, mechanical shrinkage and electrolyte uptake. This is achieved by adding nanoparticles of different types, for example, ZrO2, SnO2, SiO2 at different concentrations. Results claim that nanofibrous separators improve the mechanical and thermal stability of the mat without significantly impacting its electrochemical performances. In particular, the addition of 7 wt% of ZrO2 nanoparticles to the nanofibrous separator showed to outperform commercially available solutions (i.e., Celgard) in terms of mechanical and thermal stability exhibiting, also, electrochemical performances.

Abstract Image

通过无机纳米颗粒的掺入增强锂离子电池隔膜用静电纺丝PVDF-HFP纳米纤维:物理化学和电学表征
研究了基于聚偏氟乙烯-六氟丙烯(PVDF-HFP)纳米纤维膜的新型锂离子电池隔膜的物理化学和电化学性能。通过静电纺丝工艺生产纳米纤维垫,确保高表面体积比(S/V),并允许在合适的条件下大规模生产。在这项工作中研究的材料旨在克服一些特定于商业分离器的限制,例如,机械收缩和电解质吸收。这是通过添加不同类型的纳米颗粒来实现的,例如,不同浓度的ZrO2, SnO2, SiO2。结果表明,纳米纤维分离器提高了材料的机械稳定性和热稳定性,但对材料的电化学性能没有明显影响。特别是,在纳米纤维分离器中添加7wt %的ZrO2纳米颗粒,在机械和热稳定性方面优于市上可用的溶液(即Celgard),同时还具有电化学性能。
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来源期刊
IET Nanodielectrics
IET Nanodielectrics Materials Science-Materials Chemistry
CiteScore
5.60
自引率
3.70%
发文量
7
审稿时长
21 weeks
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