A European team of researchers has been able to 'unroll' a lithium ion battery cell using neutron and X-ray tomography and found that different sections were operating differently.
at the Zuse-Institut in Berlin then enabled researchers to virtually unwind the battery electrodes that are wound into the form of a compact cylinder. The cylindrical windings of the battery are difficult to examine quantitatively, and the cell cannot be unwound without inducing further damage that would not be present in an unwound battery.
The project was funded by the UK's Faraday Institution as part of its battery degradation project.
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