Improved low-temperature performance of lithium-ion cells with quaternary carbonate-based electrolytes

Smart, Marshall C.; Ratnakumar, B. V.; Whitcanack, L. D.; Chin, K. B.; Surampudi, S.; Croft, H. T.; Tice, David; Staniewicz, Robert J.

doi:10.1016/s0378-7753(03)00154-x

Cited by 210 publications

(173 citation statements)

References 16 publications

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“…8,9,14 In this work, methyl acetate (MA) is selected as a co-solvent for use with EC:EMC in single crystal NMC532/artificial graphite cells with 2% FEC + 1% DTD or 2% VC + 1% DTD as additives. The impacts of MA on high rate charging performance and long term lifetime are systematically studied and discussed.…”

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confidence: 99%

“…13 These cells also showed excellent calendar and cycle lifetime during testing to 4.2, 4.3 and even 4.4 V. 13 Smart et al showed that the use of low molecular weight organic esters in the ethylene carbonate and linear organic carbonates based solvent blends improved the electrolyte conductivity and low temperature performance of cells. 8,9,14 In this work, methyl acetate (MA) is selected as a co-solvent for use with EC:EMC in single crystal NMC532/artificial graphite cells with 2% FEC + 1% DTD or 2% VC + 1% DTD as additives. The impacts of MA on high rate charging performance and long term lifetime are systematically studied and discussed.…”

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Methyl Acetate as a Co-Solvent in NMC532/Graphite Cells

et al. 2018

J. Electrochem. Soc.

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One goal of researchers focusing on lithium-ion batteries for electric vehicles is to decrease the time required for charging. This can be done by several methods, including increasing the electrolyte transport properties. Methyl acetate, used as a co-solvent in the electrolyte, has been shown by a number of researchers to increase cell rate capability dramatically but careful considerations of the impact of methyl acetate on cell lifetime have not been published to our knowledge. The impacts of methyl acetate as a co-solvent in NMC532/ graphite cells were systematically studied in this work. Ex-situ gas evolution measurements, electrochemical impedance spectroscopy, high rate charging tests, ultra-high precision coulometry, isothermal microcalorimetry and long term cycling at both 20 and 40 • C were used to probe the impacts of including methyl acetate as a co-solvent. This work will be of great interest to Li-ion battery scientists developing cells that can support rapid charge and still maintain long lifetime. Lithium ion cells for electric vehicles should have long lifetime, high energy density and be able to support high rate charging. If cells are charged too rapidly for a given temperature, it is possible that unwanted lithium plating on the graphite negative electrode can occur and can accelerate cell capacity loss.1 There are a number of factors that influence the ability of cells to be charged rapidly. These include the thicknesses of the electrodes and the separator, the porosity and tortuosity of the electrodes and the separator and the electrolyte transport properties. In addition, Liu et al.,2 recently highlighted the importance of the negative electrode solid electrolyte interphase (SEI) resistance on the ability of cells to be charged rapidly without unwanted lithium plating during charge.For any given cell design, the easiest change to make in Liion cell manufacturing is a change in the electrolyte. All that entails, apart from possible materials compatibility issues, is filling cells with a different fluid. Electrolytes that promote high lithiumion diffusion constants, low viscosity, high conductivity, a high lithium ion transference number and promote low resistance negative electrode SEI layers are preferred for cells designed for high rate charging. Esters are beneficial co-solvents that lower freezing points, increase ionic conductivity and lower viscosity. Esters have been applied to improve the low temperature rate capability of Liion cells and also improve rate capability at room temperature. [3][4][5][6][7][8][9][10] Li-ion batteries with esters and positive electrodes of LiCoO 2 were studied in References 4-7 while those with LiNi x Co 1-x O 2 positive electrodes were studied by Smart et al. lifetime with an electrolyte containing 2 wt% prop-1-ene-1,3 sultone (PES) + 1 wt% tris (trimethylsilyl) phosphite (TTSPi) + 1 wt % ethylene sulfate (DTD) in 1 M LiPF 6 in ethylene carbonate (EC): ethyl methyl carbonate (EMC) (3:7 by weight). More than 92% capacity was maintained after testing for ...

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Methyl Acetate as a Co-Solvent in NMC532/Graphite Cells

et al. 2018

J. Electrochem. Soc.

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“…In low temperature environment, the charge discharge performance of lithium ion battery decreased significantly, lithium ion battery manufacturing enterprises and scientific research personnel have low charge discharge performance of lithium ion battery launched a lot of research work. The results show that the low temperature performance of lithium ion battery is due to the diffusion of lithium ion in the electrode, the surface charge transfer resistance and SEI film caused by factors such as [7]- [10], but did not determine the main factors influencing the performance of low temperature. The energy density decreased from 100Wh/kg at 25 to 5Wh/kg at −40.…”

Section: Introductionmentioning

confidence: 85%

Study on Low Temperature Performance of Li Ion Battery

Wang¹

2017

OALib

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At low temperatures, especially when the temperature drops to −20 degrees, or even lower, the energy and power of lithium ion batteries are obviously de-. In order to further grasp the lithium ion power battery charging characteristics at low temperatures and low temperature discharge performance test bench experiment simulates the low temperature environment, so as to ascertain the low charge discharge characteristics, provide the basis and guidance for the application of low temperature battery. In this paper, the cathode is three yuan for the anode material, graphite type 18,650 power lithium ion battery business as a research object of low temperature test, through the research on the low temperature performance of single battery, not only can provide the basis for the design of thermal management system of electric vehicle, but also provide theoretical and experimental basis for the AC excitation of heating. Subject AreasElectric Engineering

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“…For instance, Smart et al demonstrated that the use of low molecular weight organic esters in EC-based electrolytes greatly improved the electrolytes conductivity especially at low temperature [7][8][9]. Compared with common organic, linear carboxylic acid ester, methyl acetate, has low melting point (-98.7 °C) and viscosity (0.33 mPa s).…”

Section: Introductionmentioning

confidence: 99%