X-ray tomography for lithium ion battery electrode characterisation - A review
Publication date
2021-05-28
Document type
Conference paper
Author
Le Houx, James
Organisational unit
ISSN
Conference
5th Annual CDT Conference in Energy Storage and Its Applications
Series or journal
Energy Reports
Periodical volume
7
Periodical issue
Supplement 2
First page
9
Last page
14
Part of the university bibliography
✅
Keyword
Li-ion battery
Porous electrode
X-ray tomography
Abstract
In recent years, x-ray tomography has emerged as a powerful analytical tool for the study of lithium ion batteries and the processes occurring within. A region of specific interest is the electrode and, in particular, the heterogeneous and porous structure. The present paper is a review of studies that use x-ray tomography to characterise electrode structure, at both the cell and microstructure scales. At the cell level, x-ray tomography is used to investigate macroscopic design parameters, such as anode and cathode thicknesses, packing density and alignment of assembled cells, as well as to visualise any macroscopic structural defects, such as islanding. At the microstructure level, x-ray tomography allows for quantitative analysis of electrode structures to ascertain parameters such as particle size, tortuosity and volume fraction. The paper also explores different techniques that have been used across the field, from ex-situ, in-situ and operando techniques, to multimodal imaging methods, tomography informed design and results informed imaging.
Version
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