Characterising the structural properties of polymer separators for lithium-ion batteries in 3D using phase contrast X-ray microscopy
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
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.
Date Issued
2016-11-30
Date Acceptance
2016-09-23
Citation
Journal of Power Sources, 2016, 333 (1), pp.184-192
ISSN
0378-7753
Publisher
Elsevier
Start Page
184
End Page
192
Journal / Book Title
Journal of Power Sources
Volume
333
Issue
1
Copyright Statement
© 2016, Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000386403700022&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
EP/J021199/1
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Electrochemistry
Energy & Fuels
Materials Science, Multidisciplinary
Chemistry
Materials Science
Lithium-ion batteries
Separator
X-ray tomography
Transport properties
Characterisation
Tortuosity
POLYETHYLENE SEPARATOR
MERCURY POROSIMETRY
MICROSTRUCTURE
ELECTRODES
IRRADIATION
TORTUOSITY
MEMBRANES
SCALE
Energy
03 Chemical Sciences
09 Engineering
Publication Status
Published
Date Publish Online
2016-10-03