Flame-retardant co-solvent incorporation into lithium-ion coin cells with Si-nanoparticle anodes

Dunn, Ronald P.; Nguyen, Cao Cuong; Lucht, Brett L.

doi:10.1007/s10800-015-0856-6

Cited by 8 publications

(7 citation statements)

References 30 publications

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“…To design nonflammable electrolytes, flame-retardant organic solvents have been extensively studied, − including fluorinated solvents (e.g., methyl nonafluorobutyl ether (MFE) − and other fluorinated ethers , ), organic phosphates (e.g., dimethyl methyl phosphonate, − triphenyl phosphate, ,,− trimethyl phosphate (TMP), − and others ,− ), fluorinated alkyl phosphates, − fluorine- and phosphorus-contained solvents, ,− and other novel flame-retardant additives. − Unfortunately, none of these flame-retardant solvents can form a stable solid electrolyte interphase (SEI) on negative electrodes, thus causing poor charge–discharge reversibility (Scheme ). Many researches tried to improve the reversibility by modifying electrodes, introducing SEI-forming additives, or preforming SEI, , but the effects were unsatisfactory.…”

Section: Introductionmentioning

confidence: 99%

Optimized Nonflammable Concentrated Electrolytes by Introducing a Low-Dielectric Diluent

Takada

Yamada

2019

ACS Appl. Mater. Interfaces

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Concentrated electrolytes of LiN(SO 2 F) 2 (LiFSA) and organic phosphates (e.g., trimethyl phosphate, TMP) are receiving intense attention for safe and long-lasting lithium-ion batteries, because of their nonflammable character and unusual passivation ability toward negative electrodes. However, their high viscosity and low ionic conductivity have hampered their practical application. In this work, a low-dielectric diluent, 1,1,2,2-tetrafluoroethyl 2,2,3,3,-tetrafluoropropyl ether (HFE), is introduced into concentrated LiFSA/TMP electrolytes. Upon dilution, the viscosity drastically decreases to 11.0 mPa s and the ionic conductivity slightly increases to 0.87 mS cm −1 . More importantly, both of the nonflammable character and the unusual passivation ability are retained even after dilution. A spectroscopic analysis shows that the diluted LiFSA/TMP:HFE has a local coordination state similar to that in the concentrated LiFSA/TMP, which leads to the formation of a FSA anion-derived inorganic surface film. This work suggests the importance of the peculiar local coordination state in designing safe battery electrolytes with better passivation ability.

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Section: Introductionmentioning

confidence: 99%

Optimized Nonflammable Concentrated Electrolytes by Introducing a Low-Dielectric Diluent

Takada

Yamada

2019

ACS Appl. Mater. Interfaces

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“…Furthermore, due to DMMP-based electrolyte solutions with wide and stable electrochemical window, they were also applied for some Si anode-based LIBs. [70] Diethyl ethylphosphonate (DEEP) was derived from DMMP, whereas DEEP-based solutions demonstrated a fine compatibility with graphite anode, [71] very different with the case of DMMP usage, which was attributed to the less Li + solvation ability of DEEP than DMMP. Meanwhile, bis(2,2,2-trifluoroethyl) methylphosphonate (TFMP) and bis(2,2,2-trifluoroethyl) ethylphosphonate (TFEP) were evolved from DMMP and DEEP by partial fluorination, respectively.…”

Section: Chemelectrochemmentioning

confidence: 99%

Flame‐Retardant Additive/Co‐Solvent Contained in Organic Solution for Safe Second Batteries: A Review

Zhu

Ren

et al. 2023

ChemElectroChem

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With the increased demands of energy density boosting the electrochemical performance of the rechargeable alkali metal ion batteries, the safe operation of second batteries is attracting much attention and needs to be especially considered during their further development, which is essential in view of the well‐known fire incidents of the lithium‐ion batteries. These dangerous events in the lithium‐ion batteries are as a consequence of the exothermic chemical reactions between the flammable carbonate‐based solutions and the electrode active material under the terrible working conditions. Under this circumstance, some series of flame‐retardant organic liquid‐based solutions have demonstrated the potential towards safer rechargeable batteries with the minimal injurious or the advantageous effect on the batteries’ performance. This article reviews the flame‐retardant organic liquid‐based solutions for the rechargeable batteries, providing the reader with an overview of the safe solutions with flame‐retardant additive/co‐solvent involving trimethyl phosphate and its derivative, P‐containing amide/phosphazene, all fluorinated solvent, and ionic liquids, in which the method of adapting concentrated and locally concentrated electrolyte solution are merged in the text content. Moreover, the functionality and purpose of the constituents in some flame‐retardant mixtures are discussed and many flame‐retardant electrolyte solutions are displayed to offer improved cycling and rate performance of different electrodes compared to traditional electrolyte solutions.

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“…However, a reduced flammability of the electrolytes was not demonstrated. [142,145] Tris(trimethylsilyl) Phosphate (TTSP): An et al studied a number of different additives in high capacity NMC811||SiO x cells. The baseline electrolyte used was a conventional LiPF 6 / organic carbonate-based electrolyte that already contained several additives (see the sections on boron-and sulfur-based additives).…”

Section: Phosphorus-based Additivesmentioning

confidence: 99%

Interfacing Si‐Based Electrodes: Impact of Liquid Electrolyte and Its Components

Wölke

Sadeghi

Eshetu

et al. 2022

Adv Materials Inter

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As the demand for mobile energy storage devices has steadily increased during the past decades due to the rising popularity of portable electronics as well as the continued implementation of electromobility, energy density has become a crucial metric in the development of modern batteries. It was realized early on that the successful utilization of silicon as negative electrode material in lithium‐ion batteries would be a quantum leap in improving achievable energy densities due to the roughly ten‐fold increase in specific capacity compared to the state‐of‐the‐art graphite material. However, being an alloying type material rather than an intercalation/insertion type, silicon poses numerous obstacles that need to be overcome for its successful implementation as a negative electrode material with the most prominent one being its extreme volume changes on (de‐)lithiation. While, as of today, a plethora of different types of Si‐based electrodes have been reported, a universally common feature is the interface between Si‐based electrode and electrolyte. This review focuses on the knowledge gained thus far on the impact of different liquid electrolyte components/formulations on the interfaces and interphases encountered at Si‐based electrodes.

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Flame-retardant co-solvent incorporation into lithium-ion coin cells with Si-nanoparticle anodes

Cited by 8 publications

References 30 publications

Optimized Nonflammable Concentrated Electrolytes by Introducing a Low-Dielectric Diluent

Optimized Nonflammable Concentrated Electrolytes by Introducing a Low-Dielectric Diluent

Flame‐Retardant Additive/Co‐Solvent Contained in Organic Solution for Safe Second Batteries: A Review

Interfacing Si‐Based Electrodes: Impact of Liquid Electrolyte and Its Components

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