LiTDI and solvent mixture based electrolytes for lithium-ion cells

Niedzicki, Leszek; Brzozowski, B.; Wieczorek, Piotr Z.

doi:10.1016/j.electacta.2015.06.038

Cited by 11 publications

(8 citation statements)

References 27 publications

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“…And the G2E/MFE/FEC electrolyte had a slightly bigger E s value than EC/DMC/DEC electrolytes with and without the FEC additive, indicating that ) of the G2E/MFE/FEC electrolyte was also estimated by impedance combined with the dc polarization method using a lithium symmetric cell. 17,18 The EIS plots and time-dependence response of dc polarization are illustrated in Fig. S4.…”

Section: Resultsmentioning

confidence: 99%

“…[16][17][18] The ammability test was carried out according to the reported method. The working electrode was a glassy carbon disk (3 mm diameter), and lithium metal was used as both counter and reference electrodes.…”

Section: Methodsmentioning

confidence: 99%

“…The Li + transference number (t Li + ) was evaluated by impedance combined with a dc polarization method using a lithium symmetric cell, as described in the literature studies. [16][17][18] The ammability test was carried out according to the reported method. 19,20 The ame of the lighter approached the surface of the electrolyte (1.0 g) for some time, as shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

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A novel mixture of diethylene glycol diethylether and non-flammable methyl-nonafluorobutyl ether as a safe electrolyte for lithium ion batteries

et al. 2015

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A mixture of diethylene glycol diethylether and non-flammable methyl-nonafluorobutyl ether was introduced as a new electrolyte for lithium ion batteries. And a fluoroethylene carbonate additive was used in this electrolyte to improve the compatibility with the graphite anode. The non-flammability and high flash point of this electrolyte indicated its high safety. This electrolyte had low viscosity and its conductivity reached 3.8 mS cm À1 at 25 C. Graphite/LiFePO 4 coin cells with commercial electrodes were utilized to evaluate the performances of the electrolyte. The rate, cycle and low-temperature performances of the graphite/LiFePO 4 cells using this electrolyte were close to those of the cells using the conventional electrolytes with and without the fluoroethylene carbonate additive. These results indicated that this kind of safe electrolyte based on non-flammable hydrofluoroethers and solvents with a high flash point has great potential for practical application. Fig. 7 (a) Discharge capacity continuously cycled at different rates, (b) the corresponding charge-discharge curves of the 0.8 M LiTFSI-G2E/ MFE/FEC electrolyte, and (c) EIS plots after 3 cycles at 0.1C. J. Mater. Chem. A This journal is

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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A novel mixture of diethylene glycol diethylether and non-flammable methyl-nonafluorobutyl ether as a safe electrolyte for lithium ion batteries

et al. 2015

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“…[35b,40] The4 ,5-dicyano-2-trifluoromethylimidazolide (TDI À )a nion is reported to be ap otential lithium salt anion that can be stored in air without the risk of decomposition. [41] Understanding the impact of the conducting salt on electrolyte degradation is of considerable interest to reduce capacity fading and advance the performance of the given cell chemistry.T he lithium (fluorosulfonyl)(N-nonafluorobutanesulfonyl)imide (LiFNFSI) based electrolytes show excellent thermal stability even at elevated temperatures (85 8 8C), with negligible hydrolytic decomposition of the F-SO 2 group in the FNFSI À anion. [42]…”

Section: Transport Properties:viscosity and Conductivitymentioning

confidence: 99%

Fluorine and Lithium: Ideal Partners for High‐Performance Rechargeable Battery Electrolytes

et al. 2019

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Further enhancement in the energy densities of rechargeable lithium batteries calls for novel cell chemistry with advanced electrode materials that are compatible with suitable electrolytes without compromising the overall performance and safety, especially when considering high‐voltage applications. Significant advancements in cell chemistry based on traditional organic carbonate‐based electrolytes may be successfully achieved by introducing fluorine into the salt, solvent/cosolvent, or functional additive structure. The combination of the benefits from different constituents enables optimization of the electrolyte and battery chemistry toward specific, targeted applications. This Review aims to highlight key research activities and technical developments of fluorine‐based materials for aprotic non‐aqueous solvent‐based electrolytes and their components along with the related ongoing scientific challenges and limitations. Ionic liquid‐based electrolytes containing fluorine will not be considered in this Review.

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“…3 -4 mAh.cm −2 ). In these composite electrodes, graphite acts as a Li-intercalation material, conductive network between the Si-alloy particles, lubricant during electrode calendaring and dilutes the total volume expansion of the electrode.While the academic literature has an abundance of cycling data on Si-based half-cells using a Li metal counter electrode, 11,12,15,[23][24][25][26][27][28][29][30][31][32][33] * Electrochemical Society Member. * * Electrochemical Society Student Member.…”

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Studies of the Capacity Fade Mechanisms of LiCoO₂/Si-Alloy: Graphite Cells

Petibon

Chevrier

Aiken

et al. 2016

J. Electrochem. Soc.

126

137

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The capacity fade mechanisms of LiCoO 2 /Si-alloy:graphite pouch cells filled with a 1M LiPF 6 EC:EMC:FEC (27:63:10) electrolyte were studied using galvanostatic cycling, electrochemical impedance spectroscopy on symmetric cells, gas-chromatography and differential voltage analysis. Analysis of the gas generated during the first cycle indicated that FEC reacts at the negative electrode following a 1-electron reduction pathway and other pathways that do not lead to the formation of gaseous products. An analysis of the electrolyte showed that FEC is continuously consumed during the first 80% of the first charge (formation cycle). Typical cells charged and discharged at 40 • C showed a gradual capacity loss for the first 250 cycles followed by a sudden capacity drop associated with a large polarization growth. Analysis of the electrolyte showed that this sudden failure is associated with the depletion of FEC. The capacity loss as well as the consumption of FEC prior to the sudden failure was fitted using a model that includes a time dependence and a cycle number dependence. The time dependence was associated with the thickening solid electrolyte interface at the surface of the negative electrode particles (Si-alloy and graphite) and the cycle number dependence was associated with the solid electrolyte interface repair at the surface of Si-alloy particles during repeated expansion and contraction. Cost reduction and an increase in the volumetric energy density of Li-ion cells can possibly be attained using silicon-based negative electrodes.1-3 While these benefits have been known for many years, commercial implementation remains limited due to silicon's inherent challenges.Si-based electrodes can suffer from particle pulverization upon cycling (e.g. micron sized silicon), 1,4-7 can have loss of electronic contact between particles after repeated expansion and contraction during cycling, 2,8-10 can have high irreversible first cycle coulombic efficiency 11,[12][13][14][15] and can have low coulombic efficiency (compared to graphite electrodes) during cycling. 1,16,17 The root cause of these challenges is the large volume expansion 1,18 of the material during lithiation and subsequent contraction during delithiation. Several issues have been solved through the use of either nanosized Si or nanostructured Si. For instance the use of nanosized Si particles solves some of the pulverization problems encountered by micron sized Si particles. 1,4,11,[19][20][21] However, nanosized Si still suffers from inter-particle contact loss during cycling as well as low coulombic efficiency due to large specific surface area. 1,16In a recent publication, Chevrier et al. 16 presented a rational way to design commercially relevant Si-based negative electrodes. They showed that confining nano-domains of silicon in an alloy matrix suppresses particle pulverization and greatly reduces the surface area of Si exposed to the electrolyte. This approach yields materials with lower first cycle irreversible capacity (IRC) loss, better coulombic e...

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LiTDI and solvent mixture based electrolytes for lithium-ion cells

Cited by 11 publications

References 27 publications

A novel mixture of diethylene glycol diethylether and non-flammable methyl-nonafluorobutyl ether as a safe electrolyte for lithium ion batteries

A novel mixture of diethylene glycol diethylether and non-flammable methyl-nonafluorobutyl ether as a safe electrolyte for lithium ion batteries

Fluorine and Lithium: Ideal Partners for High‐Performance Rechargeable Battery Electrolytes

Studies of the Capacity Fade Mechanisms of LiCoO₂/Si-Alloy: Graphite Cells

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LiTDI and solvent mixture based electrolytes for lithium-ion cells

Cited by 11 publications

References 27 publications

A novel mixture of diethylene glycol diethylether and non-flammable methyl-nonafluorobutyl ether as a safe electrolyte for lithium ion batteries

A novel mixture of diethylene glycol diethylether and non-flammable methyl-nonafluorobutyl ether as a safe electrolyte for lithium ion batteries

Fluorine and Lithium: Ideal Partners for High‐Performance Rechargeable Battery Electrolytes

Studies of the Capacity Fade Mechanisms of LiCoO2/Si-Alloy: Graphite Cells

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Studies of the Capacity Fade Mechanisms of LiCoO₂/Si-Alloy: Graphite Cells