Thermal stability of lithium-ion battery electrolytes

Ravdel, Boris; Abraham, K. M.; Gitzendanner, R.; DiCarlo, Jeffrey M.; Lucht, Brett L.; Campion, Chris

doi:10.1016/s0378-7753(03)00257-x

Cited by 302 publications

(238 citation statements)

References 4 publications

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“…Indeed, this salt decomposes to LiF and PF 5 and the latter readily hydrolyzes to form HF and PF 3 O [Ravdel, 2003;Yang, 2006]. Ping et al [Ping, 2010] confirmed that the addition of lithium salt reduces drastically the thermal stability of the solvent due to the strong Lewis acidity of PF 5 in the case of LiPF 6 and BF 3 in the case of LiBF 4 even if BF 3 is a weaker Lewis acid than PF 5 .…”

Section: Thermal Behaviourmentioning

confidence: 99%

Electrolyte and Solid-Electrolyte Interphase Layer in Lithium-Ion Batteries

Chagnes¹,

Światowska²

2012

Lithium Ion Batteries - New Developments

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Section: Thermal Behaviourmentioning

confidence: 99%

Electrolyte and Solid-Electrolyte Interphase Layer in Lithium-Ion Batteries

Chagnes¹,

Światowska²

2012

Lithium Ion Batteries - New Developments

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“…LiCoO 2 , LiMn 2 O 4 , or LiNiO 2 ), a graphite anode, poly(vinylidene fluoride) (PVDF) binder, and an electrolyte containing carbonate solvents, such as dimethyl carbonate (DMC), diethyl carbonate (DEC), ethylene carbonate (EC), or propylene carbonate (PC). Unfortunately, these solvents exhibit a poor thermal stability and high vapor pressures at elevated temperatures [2,3]. Moreover, most lithiated transition-metal oxides are known for becoming unstable in their delithiated states, particularly at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Graft copolymer-based lithium-ion battery for high-temperature operation

Osswald

Daniel

et al. 2011

Journal of Power Sources

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“…• C of two IL-based electrolytes and a commercial electrolyte, in a system using Li 4 6 ], Figure 1. For each electrolyte, cycling and overcharge experiments were run in LTO // NMC coin or pouch cells.…”

mentioning

confidence: 99%

Characterization of LTO//NMC Batteries Containing Ionic Liquid or Carbonate Electrolytes after Cycling and Overcharge

Chancelier

Benayad

Gutel

et al. 2015

J. Electrochem. Soc.

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Electrochemical stabilities under cycling and overcharge of Li 4 Ti 5 O 12 (LTO) // LiNi 1/3 Mn 1/3 Co 1/3 O 2 (NMC) batteries with two ionic liquid-based electrolytes and a commercial electrolyte were investigated at 25 and 60 • C. The electrolytes were constituted of ethylene carbonate / dimethyl carbonate mixtures with LiPF 6 , and of imidazolium and pyrrolidinium-based ionic liquids containing the bis(trifluoromethanesulfonyl)imide anion (NTf 2 ) associated to LiNTf 2 salt. The experiments were performed in coin and pouch cells in order to follow the evolution of the stability of both solid, liquid and gas phases. The decomposition products and stability of the electrolytes was assessed by gas chromatography coupled with infrared spectroscopy. The characterization of the electrode surfaces by SEM, XRD and XPS techniques was reported, after cycling and overcharge. The XPS analysis of both electrodes indicated that their surfaces were covered by an IL film in the case of NMC, and by several NTf 2 anion decomposition products in the case of LTO. This work highlights the difference between thermal and electrochemical stability, especially for imidazolium-based electrolytes. Commercial lithium-ion batteries could lead to safety issues related to the use of flammable carbonates as electrolyte solvents.1 To provide safer cells, ionic liquids (IL) are widely studied as they possess negligible vapor pressure and reduced flammability.2 However, though information concerning the thermal stability of IL during combustion is beginning to emerge, 3,4 few data exist concerning their stability in case of short-circuit, overcharge or overdischarge. The aim of this work is to compare cycling and overcharge behavior at 25 and 60• C of two IL-based electrolytes and a commercial electrolyte, in a system using Li 4 Figure 1. For each electrolyte, cycling and overcharge experiments were run in LTO // NMC coin or pouch cells. The evolved gases and the battery components (electrolyte and electrodes) were analyzed after cycling and overcharge at 60• C. Results and DiscussionIn a first set of experiments, the cycling performances of LTO // NMC coin cells (∼ 2 mAh) and pouch cells (∼ 10 mAh) with the three electrolytes were investigated at 25• C and 60 • C. In the case of pouch cells, the battery evolutions were monitored by measuring the volume increase, and analyzing evolved gases. In a second set of experiments, the batteries were submitted to a charge at C/10-rate up to 4.5 V (NMC potential reached 6 V vs Li + /Li) followed by a floating of 20 h at this voltage at 60• C. Meanwhile the currents required to maintain the cell voltage and the cell volumes were measured. The emitted gases were identified by gas chromatography coupled with infrared spectroscopy (GC-IR). The post mortem analyses of the electrode surfaces were carried out by scanning electron microscopy (SEM), Xray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques. * Electrochemical Society Student Member.z E-mail: lea.chancelier@univ-lyon1.frCycling ...

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Thermal stability of lithium-ion battery electrolytes

Cited by 302 publications

References 4 publications

Electrolyte and Solid-Electrolyte Interphase Layer in Lithium-Ion Batteries

Electrolyte and Solid-Electrolyte Interphase Layer in Lithium-Ion Batteries

Graft copolymer-based lithium-ion battery for high-temperature operation

Characterization of LTO//NMC Batteries Containing Ionic Liquid or Carbonate Electrolytes after Cycling and Overcharge

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