Characterising the structural properties of polymer separators for lithium-ion batteries in 3D using phase contrast X-ray microscopy
Characterising the structural properties of polymer separators for lithium-ion batteries in 3D using phase contrast X-ray microscopy
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DOI：
10.1016/j.jpowsour.2016.09.132
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发表时间：
2016-11-30
影响因子：
9.2
通讯作者：
Shearing, Paul R.
中科院分区：
文献类型：
--
作者：
Finegan, Donal P.;Cooper, Samuel J.;Shearing, Paul R.
隔膜是优化锂离子电池性能和安全性的重要组成部分;因此，清楚地了解其微观结构如何影响电池性能和安全性至关重要。相差X射线显微镜在这里被用来捕捉商业单层，三层，和陶瓷涂层的锂离子电池聚合物隔板的微观结构。通过应用三维定量技术和体视学，确定关键结构参数（包括孔隙度、弯曲因子和孔径分布）的空间变化。在多层膜中的各个层的架构的特征在于，揭示在孔隙率，曲折因子和平均孔径的三种类型的分离器的各向异性。然后将多层膜的各个层的详细结构特性与它们对电池的安全性和倍率性能的预期效果相关联。(C)2016由Elsevier B. V.出版
Separators are an integral component for optimising performance and safety of lithium-ion batteries; therefore, a clear understanding of how their microstructure affects cell performance and safety is crucial. Phase contrast X-ray microscopy is used here to capture the microstructures of commercial monolayer, tri-layer, and ceramic-coated lithium-ion battery polymer separators. Spatial variations in key structural parameters, including porosity, tortuosity factor and pore size distribution, are determined through the application of 3D quantification techniques and stereology. The architectures of individual layers in multi-layer membranes are characterised, revealing anisotropy in porosity, tortuosity factor and mean pore size of the three types of separator. Detailed structural properties of the individual layers of multi-layered membranes are then related with their expected effect on safety and rate capability of cells. (C) 2016 Published by Elsevier B.V.