Functional electrolytes: Synergetic effect of electrolyte additives for lithium-ion battery

Abe, Kôji; Miyoshi, Kazuhiro; Hattori, Takashi; Ushigoe, Yoshihiro; Yoshitake, Hideya

doi:10.1016/j.jpowsour.2008.03.037

Cited by 54 publications

(35 citation statements)

References 25 publications

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“…The chief analytical techniques that are used to structurally analyze the SEI layer include X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy, and nuclear magnetic resonance spectroscopy (NMR). [14][15][16][17][18][19][20][21] All of these techniques enable the estimation of the skeletal structures of the compounds present in the SEI. However, since the structural formula obtained by these techniques is not supported by precise mass information, the exact reactions governing the deterioration mechanism cannot be deduced from these techniques.…”

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confidence: 99%

Liquid Chromatography-Quadruple Time of Flight Mass Spectrometry Analysis of Products in Degraded Lithium-Ion Batteries

Tochihara

Nara

Mukoyama

et al. 2015

J. Electrochem. Soc.

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The electrode surfaces of degraded lithium-ion batteries (LIB) were analyzed by liquid chromatography-quadrupole time of flight mass spectrometry (LC-QTOF/MS). The solid-electrolyte interphase (SEI) layer influences the performance of LIBs. Therefore, we conducted a study aimed at clarifying the deterioration mechanism of LIBs by examining the components in the SEI before and after degradation due to cycling. We believe that the change in the mass transfer characteristics at the electrode interface influenced by SEI deterioration can be clarified via LC-QTOF/MS, which would allow elucidation of the deterioration mechanism. The analysis results showed that the degradation products contain multiple components, including polymers of carbonate compounds and phosphate esters, which are formed via electrochemical and chemical reactions, resulting in remarkably reduced capacity. Since the invention of lithium-ion batteries (LIB), many research groups have actively conducted research on improving the battery performance.1-7 Excellent properties, including high capacity and high energy density, have been achieved owing to the work conducted so far. As a result, LIBs are not only used as power sources for mobile devices such as phones and personal computers, but are also used as power sources in electric vehicles, aviation, etc., as well as large-scale stationary power sources for smart grids. [8][9][10] Owing to the remarkable expansion in their applications, it is necessary that LIBs are highly durable and safe in various environments; as a result, durability tests for LIBs have been conducted under diverse settings. In addition, the battery deterioration mechanisms in various cases have been widely studied. 11-13To accurately understand the deterioration mechanism, it is necessary to utilize precise mass spectrometry techniques to determine the structure and composition of materials present at the electrode interface, including the electrode surface layer (i.e., solid electrolyte interface or SEI). By conducting a proper structural analysis, the deterioration mechanism can be discussed in terms of the exact reactions occurring at the interface. The chief analytical techniques that are used to structurally analyze the SEI layer include X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy, and nuclear magnetic resonance spectroscopy (NMR). 14-21All of these techniques enable the estimation of the skeletal structures of the compounds present in the SEI. However, since the structural formula obtained by these techniques is not supported by precise mass information, the exact reactions governing the deterioration mechanism cannot be deduced from these techniques. On the other hand, the use of precise mass spectrometry for analyzing the electrode interface, including the SEI layer, may allow accurate elucidation of the degradation behavior at the electrode interface by distinguishing between the degradation components and the components of the intrinsic SEI layer. Further, methods for suppr...

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mentioning

confidence: 99%

Liquid Chromatography-Quadruple Time of Flight Mass Spectrometry Analysis of Products in Degraded Lithium-Ion Batteries

Tochihara

Nara

Mukoyama

et al. 2015

J. Electrochem. Soc.

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“…2). The synergistic effect of different unsaturated compounds used in various combinations has also been reported [1].…”

Section: Sei Additives For Carbonaceous Anodesmentioning

confidence: 87%

Additives for Functional Electrolytes of Li-Ion Batteries

Tornheim

Zhang

et al. 2015

Rechargeable Batteries

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“…[51][52][53] These various studies suggest that the oxidation of electrolyte is a major issue that increases significantly with cell voltage. Self et al recently noted that decomposition products from a sulfur-containing additive (prop-1-ene-1,3-sultone) and the organic carbonate solvent oxidation have been observed at lower electrode potentials (i.e., ∼4.2 -4.7 V vs. Li/Li + ) 42 than expected from voltammetric studies (>5.3 V vs. Li/Li + ) [54][55][56][57][58] and density functional theory (DFT) calculations (> 6.0 V vs. Li/Li + ). 56,59 However it is noted that there is not universal agreement for the onset potential for electrochemical oxidation of organic carbonates (e.g., Moshkovich et al reported oxidation at > 3.9 V vs. Li/Li + ).…”

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confidence: 99%

Measuring Oxygen Release from Delithiated LiNi_xMn_yCo_1-x-yO₂and Its Effects on the Performance of High Voltage Li-Ion Cells

Xiong

Ellis

et al. 2017

J. Electrochem. Soc.

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There can be a trade-off between the lifetime and energy density of LiNi x Mn y Co 1-x-y O 2 (NMC)-containing cells that depends on their upper cutoff voltage. This work applies thermogravimetric analysis coupled with mass spectrometry (TGA-MS) to measure the release of oxygen from delithiated NMC electrode materials at high electrode potentials, i.e., low lithium content. This release is observed at relatively mild temperatures as low as 40 • C. The amount of oxygen released is greatly limited using single crystal NMC particles. Electrochemical measurements demonstrate a correlation between TGA-MS results and the cycling performance of NMC/graphite cells. X-ray photoelectron spectroscopy complements the TGA-MS results and provides evidence of the solid electrolyte interphase decomposition. The results in this work offer strong support that the release of oxygen from NMC can cause oxidative decomposition of the electrolyte and is a major reason why high voltage cells can generate gas and can have poor capacity retention. There is a need for longer-lasting and higher energy density lithium-ion cells for electrified vehicles and grid energy storage applications.1-3 Layered LiNi x Mn y Co 1-x-y O 2 (NMC) materials make good positive electrodes on account of their well-balanced properties of high specific capacity, moderate cost, and good safety.4-9 As a result, NMC/graphite cells have become a ubiquitous part of our society. However, to avoid electrolyte and material degradation, commercially available NMC-containing cells normally operate at a much lower voltage (typically ≤ 4.2 V) than their theoretical limit. This is because trade-offs exist between the lifetime and the energy density of a NMC cell that depends on its upper cutoff voltage. 10,11 One method to improve existing NMC technology is the development of new electrolyte solution chemistries. The use of new solvent blends and the introduction of electrolyte additives are two practical ways to improve the lifetime of high voltage NMC Li-ion cells. 12-22Ma et al. and Nelson et al. found that a ternary additive combination can greatly improve NMC442/graphite cell performance at high voltage.11-13 Xia et al. reported that fluorinated electrolyte and ECfree electrolyte also enhance NMC/graphite cell performance. [16][17][18][19] Another approach to improve cell stability is the application of an inorganic coating onto the NMC surface. [23][24][25][26][27][28][29] For example, Arumugam et al. reported that a surface coating of Al 2 O 3 greatly improves NMC622/graphite cell performance. 24 Whereas both of these approaches have proven to be quite valuable, further improvements to the lifetime of NMC-containing cells at high voltages are still desired.Great effort has been put forward to understand the chemical mechanisms behind the degradation of high voltage NMC cells. Analytical approaches have included monitoring impedance growth, 12,13,30-38 the volume and composition of gases produced, 39-43 the heat flow [44][45][46][47][48] and the leakage current 49,50 du...

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Functional electrolytes: Synergetic effect of electrolyte additives for lithium-ion battery

Cited by 54 publications

References 25 publications

Liquid Chromatography-Quadruple Time of Flight Mass Spectrometry Analysis of Products in Degraded Lithium-Ion Batteries

Liquid Chromatography-Quadruple Time of Flight Mass Spectrometry Analysis of Products in Degraded Lithium-Ion Batteries

Additives for Functional Electrolytes of Li-Ion Batteries

Measuring Oxygen Release from Delithiated LiNi_xMn_yCo_1-x-yO₂and Its Effects on the Performance of High Voltage Li-Ion Cells

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Functional electrolytes: Synergetic effect of electrolyte additives for lithium-ion battery

Cited by 54 publications

References 25 publications

Liquid Chromatography-Quadruple Time of Flight Mass Spectrometry Analysis of Products in Degraded Lithium-Ion Batteries

Liquid Chromatography-Quadruple Time of Flight Mass Spectrometry Analysis of Products in Degraded Lithium-Ion Batteries

Additives for Functional Electrolytes of Li-Ion Batteries

Measuring Oxygen Release from Delithiated LiNixMnyCo1-x-yO2and Its Effects on the Performance of High Voltage Li-Ion Cells

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Measuring Oxygen Release from Delithiated LiNi_xMn_yCo_1-x-yO₂and Its Effects on the Performance of High Voltage Li-Ion Cells