20.500.12556/DiRROS-30299 Spectral X-ray micro-CT imaging of rechargeable alkaline batteries Rechargeable alkaline batteries (RABs) represent a promising post-lithium energy storage technology owing to their intrinsic safety, use of sustainable materials, and compatibility with existing battery manufacturing infrastructure. However, their com- mercial deployment remains limited by insufficient understanding of ageing and degradation mechanisms. In this work, spec- tral X-ray micro-computed tomography (S-XμCT) is employed to non-destructively investigate pristine and aged Mn–Bi-based RABs, with the aim of resolving ageing-induced changes. A spectral photon-counting detector was used to acquire multi-energy datasets, which were then processed and decomposed into material-specific volumes corresponding to carbon, manganese, and bismuth. Stability and reproducibility testing confirmed the robustness of the S-XμCT acquisition and decomposition process. Quantitative image analysis revealed a pronounced increase in the number of clustered features in aged samples, strongly local- ized near the anode interface, with the bismuth specific volume providing improved discrimination compared to the traditional attenuation volume. These results highlight the added value of S-XμCT for material-specific, volumetric assessment of degrada- tion phenomena in rechargeable alkaline batteries and suggests its potential as a non-destructive diagnostic tool for battery ageing studies. zinc battery rechargeable batteries tomography alkaline batteries spectral CT cinkova baterija polnilne baterije tomografija alkalne baterije spektralni CT true false true N D T Internet Publishing Angleški jezik Slovenski jezik © 2026 The Authors Neznano 2026-06-18 12:32:02 2026-06-18 12:38:07 2026-06-19 03:52:00 0000-00-00 00:00:00 2026 0 0 Str. 1-7 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2026-03-01 620.1/.2 1435-4934 10.58286/32573 278342147 271645187 https://www.ndt.net/search/docs.php3?id=32573 1 9147fafb-6af8-11f1-be3d-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=45949 RAZ_Coathup_Andrew_2026.pdf RAZ_Coathup_Andrew_2026.pdf 1 55C08BAB3C968413507E743C446D9C78 c5281b0f1fbfa5a6d01581225487d833faa23b7c1333aba719c6c869d05a04cf 58b815ab-6af9-11f1-be3d-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=45950 Zavod za gradbeništvo Slovenije 0 0 0