Thermal Stability of 18650 Size Li-Ion Cells Containing LiBOB Electrolyte Salt

Jiang, Junwei; Fortier, H.; Reimers, J. N.; Dahn, J. R.

doi:10.1149/1.1667520

Cited by 84 publications

(81 citation statements)

References 10 publications

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“…[111] With respect to the thermal stability,L iBOB exhibits beneficial behavior in contact with lithiated graphite, buts hows rather high self-heating rates in the presence of LiCoO 2 -based cathodes; thus, also baring severe safety concerns. [112] In an approacht oo vercome these issues, al ithium salt derivativew as proposed that combinedt he advantages of LiBOB and previously mentioned LiBF 4 :l ithium oxalyldifluoroborate b) The corresponding differential scanningc alorimetry (DSC) results. [98] ChemSusChem 2015, 8,2154 -2175 www.chemsuschem.org (LiODFB).…”

Section: Chelating Borate-based Lithium Saltsmentioning

confidence: 99%

Safer Electrolytes for Lithium‐Ion Batteries: State of the Art and Perspectives

et al. 2015

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Lithium-ion batteries are becoming increasingly important for electrifying the modern transportation system and, thus, hold the promise to enable sustainable mobility in the future. However, their large-scale application is hindered by severe safety concerns when the cells are exposed to mechanical, thermal, or electrical abuse conditions. These safety issues are intrinsically related to their superior energy density, combined with the (present) utilization of highly volatile and flammable organic-solvent-based electrolytes. Herein, state-of-the-art electrolyte systems and potential alternatives are briefly surveyed, with a particular focus on their (inherent) safety characteristics. The challenges, which so far prevent the widespread replacement of organic carbonate-based electrolytes with LiPF6 as the conducting salt, are also reviewed herein. Starting from rather "facile" electrolyte modifications by (partially) replacing the organic solvent or lithium salt and/or the addition of functional electrolyte additives, conceptually new electrolyte systems, including ionic liquids, solvent-free, and/or gelled polymer-based electrolytes, as well as solid-state electrolytes, are also considered. Indeed, the opportunities for designing new electrolytes appear to be almost infinite, which certainly complicates strict classification of such systems and a fundamental understanding of their properties. Nevertheless, these innumerable opportunities also provide a great chance of developing highly functionalized, new electrolyte systems, which may overcome the afore-mentioned safety concerns, while also offering enhanced mechanical, thermal, physicochemical, and electrochemical performance.

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Section: Chelating Borate-based Lithium Saltsmentioning

confidence: 99%

Safer Electrolytes for Lithium‐Ion Batteries: State of the Art and Perspectives

et al. 2015

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“…目前, 新型锂盐的研究主要是改变阴离子种类 [51] , 但或多或少都存在一些严重缺点, 并不能完全替代 [3,8] . ARC 表明 [53,54] , [55,56] . Figure 7 Chemical structural formulas of some lithium salts LiODFB 是继 LiBOB 后, 另外一种具有前景的锂盐, 最早是由 Central Glass 公司报道.…”

Section: Figureunclassified

Review of Electrolyte Additives for Ternary Cathode Lithium-ion Battery

Deng¹,

Sun²,

Wan³

et al. 2018

Acta Chim. Sinica

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, M＝Mn, NMC; M＝Al, NCA)} are one of the most promising cathode materials of lithium-ion batteries (LIBs). However, in the traditional electrolyte system, they will undergo dramatic structural changes and interface side reactions at high potential and high temperature, which will bring great challenges to their practical application, especially for their cycle life and safety. Developing appropriate electrolyte additive is one of the most economical and effective methods to improve the electrochemical performance of LIBs. Based on the intrinsic structure of material, electrolyte additives used for NMC and NCA ternary cathode and their reaction mechanism in the past 5 years are reviewed in this paper, which include vinylene carbonate (VC), fluoro-compounds, new lithium salts, P-based, B-based, S-based, nitrile, others and combinative additives. Among them, VC becomes a kind of universal additive, which can improve the efficiency and cycle life at low voltage and normal temperature. Fluoro-compounds have been developed from mono substituted such as Fluorinated ethylene carbonate (FEC) to multi-fluorine substituted, which can improve the stability of electrode/electrolyte interface under high voltage. New lithium salt additives are mainly used to improve the film forming performance under high voltage and high temperature, such as Lithium bis(fluorosulfonyl)imide (LiFSI), Lithium difluorophosphate (LiDFP). P-contained additives [such as Tris(trimethylsilyl)phosphite (TMSPi)] are mainly to improve the stability of anode-electrolyte interface, and it has obvious synergistic effect when they combined with additives such as VC. B-contained additives are mainly used to improve the dissociation degree and stability of lithium salt, such as Tris(trimethylsilyl)borate (TMSB). S-contained additives are mainly used to improve the ionic conductivity and stability of anode SEI film, such as Prop-1-ene-1,3-sultone (PES). Nitriles are benefited from the strong electron withdrawing effect of -CN, which can improve the stability of the electrode/electrolyte interface at high voltage. Other types of additives are some heterocyclic compounds having film forming ability and various silanes which can eliminate HF and H 2 O. Combinative additives are developed from VC based composite to PES and PBF (pyridine boron trifluoride) system, which can endure even harsher conditions.

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“…Much R&D effort has been focused on new generation Li-ion batteries for application in strong-HEVs. While batteries of different chemistry already meet the power requisite, some concerns still remain about their safety mainly because of the tolerance to abusive conditions that may trigger dangerous, thermal runaway reactions [2]. LiFePO 4 is a nontoxic lithium intercalation compound with a theoretical capacity of 170 Ah kg -1 featuring low cost and thermal stability and is one of the most preferred cathode materials.…”

Section: Introductionmentioning

confidence: 99%

A three-dimensional carbon-coated LiFePO4 electrode for high-power applications

2009

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The fabrication process of a new, threedimensional carbon-coated LiFePO 4 electrode by sol-gel synthesis in situ on interconnected conducting fibers of carbon paper is described. This three-dimensional structure ensures overall electrode conductivity, facilitates lithium diffusion in and out of LiFePO 4 particles and, hence, enables good cycling stability at 1C-rate and maximum pulse-power values that exceed those of planar LiFePO 4 electrodes at high electrode loading.

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Thermal Stability of 18650 Size Li-Ion Cells Containing LiBOB Electrolyte Salt

Cited by 84 publications

References 10 publications

Safer Electrolytes for Lithium‐Ion Batteries: State of the Art and Perspectives

Safer Electrolytes for Lithium‐Ion Batteries: State of the Art and Perspectives

Review of Electrolyte Additives for Ternary Cathode Lithium-ion Battery

A three-dimensional carbon-coated LiFePO4 electrode for high-power applications

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