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• W4385392059 endingPage "121651" @default.
• W4385392059 startingPage "121651" @default.
• W4385392059 abstract "A comprehensive understanding of thermal runaway (TR) features and battery venting gas (BVG) explosion characteristics is the critical issue of thermal hazard prevention. In this study, commercial-size lithium-ion batteries with LiFePO4 (LFP) and Li(NixCoyMnz)O2 (NCM, x from 0.5 to 0.8) cathode materials, as well as the micro-overcharged cells, are triggered to TR under adiabatic conditions using an accelerating rate calorimeter. In addition, the obtained BVG is transferred into the gas chromatograph for further component identification. Subsequently, the specific values of the intrinsic battery safety performance (TR tolerance and TR hazards) and BVG explosion risks (lower explosion limits, LEL) are calculated. The results show that, from the perspective of battery TR evolution features, LFP batteries have greater TR tolerance than NCM batteries. Moreover, the TR hazards of NCM batteries are more severe than LFP batteries and worsen with increasing nickel content, which is proved by ambient temperature and post-disaster analysis. The primary types of BVG consist of hydrogen, carbon monoxide, carbon dioxide and hydrocarbon gases for both LFP and NCM batteries. However, due to the significant amount of hydrogen and hydrocarbon gases with low LEL values, the LEL values of BVG for LFP batteries are lower than NCM batteries, demonstrating the higher deflagration risks for the former. Besides, the LEL values of NCM batteries' BVG increase with higher energy density. A single micro-overcharge leads to lower TR tolerance and TR hazards but has little effect on LEL values for NCM cells. It is obvious that the safety issues associated with LFP batteries should also be given sufficient attention to avoid system-level explosions. The quantitative evaluation results of this paper provide new ideas for battery intrinsic safety performance assessment and a clear direction for mitigation strategy of battery TR-related secondary disasters." @default.
• W4385392059 created "2023-07-30" @default.
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• W4385392059 date "2023-11-01" @default.
• W4385392059 modified "2023-10-18" @default.
• W4385392059 title "A comprehensive insight into the thermal runaway issues in the view of lithium-ion battery intrinsic safety performance and venting gas explosion hazards" @default.
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• W4385392059 doi "https://doi.org/10.1016/j.apenergy.2023.121651" @default.
• W4385392059 hasPublicationYear "2023" @default.
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