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DOI	10.1039/c8ee00875b
	Topological and network analysis of lithium ion battery components: The importance of pore space connectivity for cell operation
	Lagadec M.F.; Zahn R.; Müller S.; Wood V.
发表日期	2018
ISSN	17545692
起始页码	3194
结束页码	3200
卷号	11 期号:11
英文摘要	The structure of lithium ion battery components, such as electrodes and separators, are commonly characterised in terms of their porosity and tortuosity. The ratio of these values gives the effective transport coefficient of lithium ions in the electrolyte-filled pore spaces, which can be used to determine the ionic resistivity and corresponding voltage losses. Here, we show that these microstructural characteristics are not sufficient. Analysis of tomographic data of commercial separators reveals that different polyolefin separators have similar porosity and through-plane tortuosity, which, in the homogenised picture of lithium ion cell operation, would imply that these different separators exhibit similar performance. However, numerical diffusion simulations indicate that this is not the case. We demonstrate that the extent to which lithium ion concentration gradients are induced or smoothed by the separator structure is linked to pore space connectivity, a parameter that can be determined by topological or network based analysis of separators. These findings enable us to propose how to design separator microstructures that are safer and accommodate fast charge and discharge. © The Royal Society of Chemistry 2018.
英文关键词	Charging (batteries); Electrolytes; Ions; Porosity; Separators; Topology; Cell operation; Fast charges; Lithium-ion cells; Micro-structural characteristics; Numerical diffusion; Tomographic data; Transport coefficient; Voltage loss; Lithium-ion batteries; electrolyte; equipment component; fuel cell; lithium; network analysis; performance assessment; polymer; pore space; topology; tortuosity
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190074
作者单位	Department of Information Technology and Electrical Engineering, ETH Zurich, Zurich, CH-8092, Switzerland
推荐引用方式 GB/T 7714	Lagadec M.F.,Zahn R.,Müller S.,et al. Topological and network analysis of lithium ion battery components: The importance of pore space connectivity for cell operation[J],2018,11(11).
APA	Lagadec M.F.,Zahn R.,Müller S.,&Wood V..(2018).Topological and network analysis of lithium ion battery components: The importance of pore space connectivity for cell operation.Energy & Environmental Science,11(11).
MLA	Lagadec M.F.,et al."Topological and network analysis of lithium ion battery components: The importance of pore space connectivity for cell operation".Energy & Environmental Science 11.11(2018).