Advanced Liquid Electrolyte Solutions

Aurbach, Doron; Schechter, Alex

doi:10.1007/978-0-387-92675-9_18

Cited by 7 publications

(4 citation statements)

References 130 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 The rate and product of this side reaction will vary depending on the composition of the electrolyte, however this process is non-reversible. 13 If the change in the amount of gas inside the chamber is considered to be held constant, the pressure is then inversely proportional to the change in internal volume of the test chamber. The recoverable nature of this volume change during a complete charge/discharge cycle, appears to be linked to the lithium intercalation/de-intercalation process and thus to the battery electrode material.…”

Section: Resultsmentioning

confidence: 99%

The Effects of Internal Pressure Evolution on the Aging of Commercial Li-Ion Cells

Matasso

Wetz

Liu

2014

J. Electrochem. Soc.

View full text Add to dashboard Cite

Utilizing a custom developed chamber, the internal pressure evolution of a commercial 2.6 Ah, LiFePO 4 //Graphite lithium-ion battery (LIB) was studied throughout elevated rate lifecycle testing. Verification tests confirmed the custom test chamber and puncture procedure resulted in minimal changes to the LIB performance. Capacity measurements and analysis confirmed the battery's accessible capacity faded 20% after 500 cycles as a result of the increase in DC Equivalent Series Resistance (ESR). Electrochemical Impedance Spectroscopy (EIS) measurements and modeling analysis also established that minimal material change occurred within the LIB during lifecycle testing and the decreased capacity is believed to primarily result from the increase in battery ESR. Analysis of the battery's internal pressure evolution during the baseline discharges yielded information elucidating apparent electrode volume changes during the 1 C discharge. A strong statistically significant correlation was identified between the 1C molar density delta and the battery capacity fade. Differential capacity analysis was used to examine the correlation of the behavior with the de-intercalation process. The pressure data and molar density analysis indicated a reduction in the amount of lithium de-intercalated during discharge as a result of the rise in ESR and thus a measurable shift in the volume as the LIB ages.Over the last two decades, the demand for energy dense electrochemical storage devices has grown exponentially in response to the proliferation of portable electronics. This demand has expanded beyond energy density to include the need for power density as applications such as hybrid electric vehicles, full electric vehicles, aircraft backup power, grid-tie energy storage, and renewable energy emerge. While there are many electrochemical storage devices that work well in either energy or power applications, LIBs have led the way in combining both energy and power density making them the chemistry of choice for these demanding applications. These storage systems are typically driven by performance, cost, and safety. Due to these driving factors, an innovative evaluation of LIB life and failure prediction is needed. The complexity of LIBs creates a challenge to this evaluation and an investigation of the aging process further complicates the pursuit. A comprehensive review of the mechanisms of aging in LIBs was conducted for the FreedomCAR research initiative, and reports that the 'Capacity decrease and power fading do not originate from one single cause, but from a number of various processes and their interactions. Moreover, most of these processes cannot be studied independently and occur at similar timescales, complicating the investigation of aging mechanisms. 1 Numerous studies have examined the causes for capacity fade in LIBs and the result indicates that capacity fade is linked to chemical and structural changes within the battery. Electrolyte decomposition occurs contributing to the growth of passivation layers at the electrode...

show abstract

Section: Resultsmentioning

confidence: 99%

The Effects of Internal Pressure Evolution on the Aging of Commercial Li-Ion Cells

Matasso

Wetz

Liu

2014

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…There are several types of electrolytes but the most used are still the liquid electrolytes with different lithium salts types. Those electrolytes are generally based on organic alkyl carbonates that are volatile and flammable, and therefore, represent a problem with respect to battery safety [7]. Another problem of the liquid electrolytes is its reaction with lithium metal that results in the growth of Li dendrites which render internal short circuits that often lead to overheating and ignition, causing battery explosion [8].…”

Section: Introductionmentioning

confidence: 99%

Solid polymer electrolytes based on lithium bis(trifluoromethanesulfonyl)imide/poly(vinylidene fluoride -co-hexafluoropropylene) for safer rechargeable lithium-ion batteries

Gonçalves

Miranda

Almeida

et al. 2019

Sustainable Materials and Technologies

View full text Add to dashboard Cite

The increasing use of electronic portable systems and the consequent energy demand, leads to the need to improve energy storage systems. According to that and due to safety issues, high-performance non-flammable electrolytes and solid polymer electrolytes (SPE) are needed. SPE containing different amounts of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) into a poly(vinylidene fluoride-co-hexafluoropropylene), PVDF-HFP, polymer matrix have been prepared by solvent casting. The addition of LiTFSI into PVDF-HFP allows to tailor thermal, mechanical and electrical properties of the composite.In particular, the ionic conductivity of the composites increases with LiTFSI content, the best ionic conductivities of 0.0011 mS/cm at 25º C and 0.23 mS/cm at 90 ºC were obtained for the PVDF-HFP/LiTFSI composites with 80wt.% of LiTFSI.This solid electrolyte allows the fabrication of Li metallic/SPE/C-LiFePO4 half-cells with a discharge capacity of 51.2 mAh.g -1 at C/20. Further, theoretical simulations show that the discharge capacity value depends on the lithium concentration and percentage of free ions and is independent of the solid polymer electrolyte thickness. On the other hand, the voltage plateau depends on the SPE thickness. Thus, a solid electrolyte is presented for the next generation of safer solid-state batteries.

show abstract

“…) likely due to magnesium inactivity towards ethers and RMgX compounds. 7 However, despite the high reversibility of Mg electrodes in Grignard/ether solutions, organohaloaluminate/ether electrolytes exhibits relatively narrow electrochemical stability window (up to 2.2 V vs. Mg) thus greatly limiting the choice of cathodes for Mg batteries. 5 In order to improve Mg battery performance, new electrolyte solutions with a wide electrochemical window 8 as well as novel polymeric gel electrolytes 9 are beginning to emerge.…”

mentioning

confidence: 99%

Nanostructured Layered Cathode for Rechargeable Mg-Ion Batteries

et al. 2015

View full text Add to dashboard Cite

Nanostructured bilayered V2O5 was electrochemically deposited within a carbon nanofoam conductive support. As-prepared electrochemically synthesized bilayered V2O5 incorporates structural water and hydroxyl groups, which effectively stabilizes the interlayers and provides coordinative preference to the Mg(2+) cation in reversible cycling. This open-framework electrode shows reversible intercalation/deintercalation of Mg(2+) ions in common electrolytes such as acetonitrile. Using a scanning transmission electron microscope we demonstrate that Mg(2+) ions can be effectively intercalated into the interlayer spacing of nanostructured V2O5, enabling electrochemical magnesiation against a Mg anode with a specific capacity of 240 mAh/g. We employ HRTEM and X-ray fluorescence (XRF) imaging to understand the role of environment in the intercalation processes. A rebuilt full cell was tested by employing a high-energy ball-milled Sn alloy anode in acetonitrile with Mg(ClO4)2 salt. XRF microscopy reveals effective insertion of Mg ions throughout the V2O5 structure during discharge and removal of Mg ions during electrode charging, in agreement with the electrode capacity. We show using XANES and XRF microscopy that reversible Mg intercalation is limited by the anode capacity.

show abstract

Advanced Liquid Electrolyte Solutions

Cited by 7 publications

References 130 publications

The Effects of Internal Pressure Evolution on the Aging of Commercial Li-Ion Cells

The Effects of Internal Pressure Evolution on the Aging of Commercial Li-Ion Cells

Solid polymer electrolytes based on lithium bis(trifluoromethanesulfonyl)imide/poly(vinylidene fluoride -co-hexafluoropropylene) for safer rechargeable lithium-ion batteries

Nanostructured Layered Cathode for Rechargeable Mg-Ion Batteries

Contact Info

Product

Resources

About