20.500.12556/DiRROS-22500 On thermal safety characteristics of rechargeable alkaline batteries based on zinc and manganese dioxide As lithium-ion technology's exhibits inherent issues with safety due to thermal runaway, a sustainable and cheaper alternative has been proposed in this work: the rechargeable alkaline battery chemistry. However, so far, the postulated safety of the new battery chemistry has not been demonstrated adequately. Therefore, a safety study is being carried out for rechargeable alkaline battery cells. This Short Communication paper is the first report on the thermal safety of Zn-MnO₂ CR2032 rechargeable alkaline battery coin cells. 100% charged coin cells were tested under thermal abuse conditions in a gravity-convection furnace to quantify the temperature at which the cell would go into thermal runaway. Morphological characterisation of pristine and tested cells was performed via laboratory-based X-ray computed microtomography. The onset temperature to thermal runaway for the rechargeable alkaline battery cells was found to be in the range of 290-380 °C, much higher than that reported in the literature for lithium-ion cells (150-200 °C) of similar capacity and geometry. These results emphasise that rechargeable alkaline battery technology has improved thermal stability compared to lithium-ion technology. Lastly, morphological analyses highlighted the variations of cell geometry brought about by thermal testing. rechargeable alkaline battery thermal runaway battery degradation MnO2 Zn zinc X-ray microtomography polnilna alkalna baterija termalno pregrevanje degradiranje baterije MnO2 Zn cink rentgenska mikrotomografija true false true Institution of Chemical Engineers Angleški jezik Slovenski jezik © 2025 The Authors Neznano 2025-05-23 08:48:45 2025-05-23 09:06:04 2025-10-24 03:51:24 0000-00-00 00:00:00 2025 0 0 str. 1-8 [article no.] 107175 Vol. 199 Jul. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2025-05-11 621.35/.36 1744-3598 10.1016/j.psep.2025.107175 236338435 https://www.sciencedirect.com/science/article/pii/S0957582025004422 1 faa12ead-37a1-11f0-963a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=32512 RAZ_Rojas_Alva_Wilson_Ulises_2025.pdf RAZ_Rojas_Alva_Wilson_Ulises_2025.pdf 1 3AB1FC6011628FFB71D5BF47ED7EC474 a82991893b5419c4b2b09be8f1720d60ef96b8051e244f9d109d7ea427a70195 c662e215-37a3-11f0-963a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=32513 RAZ_Rojas_Alva_Wilson_Ulises_2025.docx RAZ_Rojas_Alva_Wilson_Ulises_2025.docx 1 2BB4907FEDE4F4E447B1B6FE5F9CA39A 4d73dc24619dadfada28eb1202ac1f8511d2a2b9021f2ad093c5bfca6db4e8ce ceb8d77b-37a3-11f0-963a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=32514 Zavod za gradbeništvo Slovenije 0 0 0