Thermal stability analysis of nitrile additives in LiFSI for lithium-ion batteries: An accelerating rate calorimetry study
Rattachement africain : kr. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Although lithium-ion batteries (LIBs) are extensively used as secondary storage energy devices, they also pose a significant fire and explosion hazard. Subsequently, thermal stability studies for LiPF 6 - and LiFSI-type electrolytes have been conducted extensively. However, the thermal characteristics of these electrolytes with thermally stable additives in a full cell assembly have yet to be explored. This study presents a comprehensive accelerating rate calorimetry (ARC) study. First, 1.2-Ah cells were prepared using a control commercial LiPF 6 electrolyte and LiFSI with a specific succinonitrile additive and ethyl-methyl carbonate as a thermally stable electrolyte additive. The kinetic parameters involved in heat generation and their effects on the thermal properties of the ARC module were analyzed from the heat-wait-seek (HWS), self-heating (SH), and thermal runaway (TR) stages. The results indicate that the addition of a succinonitrile additive to the LiFSI electrolyte lowers the decomposition temperatures of the solid electrolyte interface (SEI) owing to polymerization with Li at the anode, while simultaneously increasing the activation energy of reaction temperatures at SEI between the separator and the electrolyte. the maximum thermal-runaway temperature decreased from 417 °C (Δ H = 5.26 kJ) (LiPF 6 ) to 285 °C (Δ H = 2.068 kJ) (LiFSI + succinonitrile). This study provides key insights to the thermal characteristics of LiPF 6 and LiFSI during the self-heating and thermal runaway stages and indicates a practical method for achieving thermally stable LIBs.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Thermal stability analysis of nitrile additives in LiFSI for lithium-ion batteries: An accelerating rate calorimetry study
- Date Crossref
- 01/05/2024
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Korea Electrotechnology Research Institute pays non établi dans la noticeOrganisation à but non lucratif
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Korea University of Science and Technology pays non établi dans la noticeUniversité ou école supérieure
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Daegu Gyeongbuk Institute of Science and Technology Department of Energy Science and Engineering pays non établi dans la noticeUniversité ou école supérieure
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Yonsei University Department of Chemical and Biomolecular Engineering pays non établi dans la noticeUniversité ou école supérieure
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University of Science and Engineering (UST) Department of Electric Materials (Electro-Functional) Engineering pays non établi dans la noticeUniversité ou école supérieure
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Next Generation Battery Research Center pays non établi dans la noticeStructure de recherche
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Energy Science and Engineering Research Center pays non établi dans la noticeStructure de recherche
Korea Electrotechnology Research Institute, Korea University of Science and Technology et Department of Energy Science and Engineering — Daegu Gyeongbuk Institute of Science and Technology, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.