2-Cyanofuran—A novel vinylene electrolyte additive for PC-based electrolytes in lithium-ion batteries

Korepp, Christiane; Santner, Heinrich; Fujii, Takashi; Ue, Makoto; Besenhard, Jürgen; Möller, Kai-Christian; Winter, Martin

doi:10.1016/j.jpowsour.2005.09.021

Cited by 98 publications

(51 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the compatibility of these ILs with graphitic negative electrodes is poor, as there is no effective solid electrolyte interphase (SEI) formation as in the case of organic solvent-based electrolytes. [50][51][52][53][54][55][56][57] Thus, the large IL-cations can be co-intercalated together with lithium ions, thus causing graphite exfoliation. 58 Therefore, alternative anode materials are investigated, namely metallic lithium and Li 4 Ti 5 O 12 (LTO), both of them displaying a good compatibility with pyrrolidinium-based ionic liquids.…”

mentioning

confidence: 99%

Reversible Intercalation of Bis(trifluoromethanesulfonyl)imide Anions from an Ionic Liquid Electrolyte into Graphite for High Performance Dual-Ion Cells

Placke

Fromm

Lux

et al. 2012

J. Electrochem. Soc.

300

345

View full text Add to dashboard Cite

Dual-graphite cells have been proposed as electrochemical energy storage systems using graphite as both, the anode and cathode, whereas the electrolyte cations intercalate into the negative electrode and the electrolyte anions intercalate into the positive electrode during charge. On discharge, cations and anions are released back into the electrolyte. In this contribution, we present highly promising results for "dual-ion cells" based on intercalation of bis(trifluoromethanesulfonyl)imide anions into a graphite cathode from an ionic liquid-based electrolyte, namely N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (Pyr 14 TFSI). As the compatibility of this ionic liquid with graphitic anodes is relatively poor, metallic lithium and lithium titanate (Li 4 Ti 5 O 12 ) are used as anode. As both cations and anions participate in the charge/discharge reaction and other anode materials than graphite are possible, we propose the name "dual-ion cells" for these systems. The cell performance was studied in terms of cut-off voltage, temperature, cycling stability, self-discharge and rate performance. Depending on the cut-off voltage and temperature, coulombic efficiencies of more than 99 % and specific discharge capacities exceeding 100 mAh g −1 (based on graphite cathode weight) were achieved. Furthermore, this system provides an excellent cycling stability and capacity retention above 99 % after 500 cycles, outperforming reported organic solvent-based dual-graphite or dual-ion cells. Graphite is a redox-amphoteric intercalation host and therefore cations and anions can be electrochemically intercalated at different potentials yielding so-called donor-type or acceptor-type graphite intercalation compounds (GICs).1,2 Currently, the predominantly used donor-type GIC is LiC x . The LiC x /C x redox couple is the major active compound for state-of-the-art negative electrodes in lithium ion batteries. [3][4][5][6][7] Compared to the limited number of cationic intercalation guests, there is a broad spectrum of different anions capable to form acceptor-type GICs. Examples are hexa-or tetrafluoride guest species, e. g. PF 6− , AsF In 1938, Rüdorff and Hofmann developed the first ion transfer or rocking chair cell based on the shuttling of HSO 4 − anions between two graphite electrodes ( Figure 1a).14 This cell can be considered as the ancestor of the well-known lithium-ion cell, where lithium cations are transferred between two insertion electrodes during the charge/discharge process (Figure 1b). 3 In the 1990s, a rechargeable electrochemical energy storage system, using graphite as positive and negative electrode material in combination with a non-aqueous electrolyte has been introduced by and Carlin et al. 27,28 Carlin et al. investigated the reductive and oxidative intercalation of different cations and anions from ionic liquid-based electrolytes (without any additional lithium salt), such as 1-ethyl-3-methylimidazolium hexafluorophosphate (EMI + PF 6 − ). This system, a so-called dual-graphite cell, was bas...

show abstract

mentioning

confidence: 99%

Reversible Intercalation of Bis(trifluoromethanesulfonyl)imide Anions from an Ionic Liquid Electrolyte into Graphite for High Performance Dual-Ion Cells

Placke

Fromm

Lux

et al. 2012

J. Electrochem. Soc.

300

345

View full text Add to dashboard Cite

show abstract

“…As shown in Figure 2 the typical, [45][46][47][48][49] reversible Li + intercalation and deintercalation into graphite takes place in each CLiP electrodes, dendrite growth should be more pronounced on the lithium foil electrode.…”

Section: Resultsmentioning

confidence: 90%

Coated Lithium Powder (CLiP) Electrodes for Lithium‐Metal Batteries

Heine

Krüger

Hartnig

et al. 2013

Advanced Energy Materials

177

120

View full text Add to dashboard Cite

Safety issues caused by the metallic lithium inside a battery represent one of the main reasons for the lack of commercial availability of rechargeable lithium‐metal batteries. The advantage of anodes based on coated lithium powder (CLiP), compared to plain lithium foil, include the suppression of dendrite formation, as the local current density during stripping/plating is reduced due to the higher surface area. Another performance and safety advantage of lithium powder is the precisely controlled mass loading of the lithium anode during electrode preparation, giving the opportunity to avoid Li excess in the cell. As an additional benefit, the coating makes electrode manufacturing safer and eases handling. Here, electrodes based on coated lithium powder electrodes (CLiP) are introduced for application in lithium‐metal batteries. These electrodes are compared to lithium foil electrodes with respect to cycling stability, coulombic efficiency of lithium stripping/plating, overpotential, and morphology changes during cycling.

show abstract

“…The theory claims free ions without any ion pair formation. Nevertheless, the degree of ion pair formation was estimated by the so-called Haven ratio H [Equation (8)], which is the ratio of electrochemical conductivity and the conductivity [Equation (6)] calculated from diffusion coefficients obtained in concentrated solutions [47,48]:…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, sufficient solubility of the salt and a high conductivity of the resulting electrolyte solution are required [4,5]. Other major requests include fast formation of a protecting solid electrolyte interphase (SEI) at the anode [7][8][9] and protection of the aluminum current collector from anodic dissolution [10,11]. Additionally, low costs of the electrolyte and non-toxicity matters for high volume production and consumer application.…”

Section: Introductionmentioning

confidence: 99%

A Liquid Inorganic Electrolyte Showing an Unusually High Lithium Ion Transference Number: A Concentrated Solution of LiAlCl4 in Sulfur Dioxide

et al. 2013

View full text Add to dashboard Cite

Abstract:We report on studies of an inorganic electrolyte: LiAlCl 4 in liquid sulfur dioxide. Concentrated solutions show a very high conductivity when compared with typical electrolytes for lithium ion batteries that are based on organic solvents. Our investigations include conductivity measurements and measurements of transference numbers via nuclear magnetic resonance (NMR) and by a classical direct method, Hittorf's method. For the use of Hittorf's method, it is necessary to measure the concentration of the electrolyte in a selected cell compartment before and after electrochemical polarization very precisely. This task was finally performed by potentiometric titration after hydrolysis of the salt. The Haven ratio was determined to estimate the association behavior of this very concentrated electrolyte solution. The measured unusually high transference number of the lithium cation of the studied most concentrated solution, a molten solvate LiAlCl 4 × 1.6SO 2 , makes this electrolyte a promising alternative for lithium ion cells with high power ability. OPEN ACCESSEnergies 2013, 6 4449

show abstract

2-Cyanofuran—A novel vinylene electrolyte additive for PC-based electrolytes in lithium-ion batteries

Cited by 98 publications

References 5 publications

Reversible Intercalation of Bis(trifluoromethanesulfonyl)imide Anions from an Ionic Liquid Electrolyte into Graphite for High Performance Dual-Ion Cells

Reversible Intercalation of Bis(trifluoromethanesulfonyl)imide Anions from an Ionic Liquid Electrolyte into Graphite for High Performance Dual-Ion Cells

Coated Lithium Powder (CLiP) Electrodes for Lithium‐Metal Batteries

A Liquid Inorganic Electrolyte Showing an Unusually High Lithium Ion Transference Number: A Concentrated Solution of LiAlCl4 in Sulfur Dioxide

Contact Info

Product

Resources

About