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LiTFSI/ TFSI

Li/LiTFSI + PPI3-TFSI/UC0O2 [23]. (PP13 A -methyl-iV-propylpiperidinium Figure 14.6a)... [Pg.180]

Figure 14.8 Galvanostatic charge-discharge curves for initial 50 cycles of Li/0.4 mol dm LiTFSI in PPI3-TFSI/UC0O2 cell at C/2 current rate, 3.2 to 4.2 V. (Adapted from Sakaebe and Matsumoto [25])... Figure 14.8 Galvanostatic charge-discharge curves for initial 50 cycles of Li/0.4 mol dm LiTFSI in PPI3-TFSI/UC0O2 cell at C/2 current rate, 3.2 to 4.2 V. (Adapted from Sakaebe and Matsumoto [25])...
Figure 14.9 Scanning electron micrographs for the surface of Al oxydized (a) up to 5.5 V in 0.4 mol dm- LiTFSI/EC-DMC and (b) up to 6.5 V in 0.4 mol dm UTFSI/PP13-TFSI. The Al surface tvas scratched in an Ar atmosphere by emery paper before the electrochemical reaction. (Reproduced from Sakaebe and Matsumoto [29])... Figure 14.9 Scanning electron micrographs for the surface of Al oxydized (a) up to 5.5 V in 0.4 mol dm- LiTFSI/EC-DMC and (b) up to 6.5 V in 0.4 mol dm UTFSI/PP13-TFSI. The Al surface tvas scratched in an Ar atmosphere by emery paper before the electrochemical reaction. (Reproduced from Sakaebe and Matsumoto [29])...
Figure 14.10 Galvanostatic charge-discharge curves for the initial 12 cycles of Li/0.4mol drrr LiTFSI in PP13-TFSI/ MCMB2800 cell at C/10 current rate (CCr arge for initial 11 cycles and CCCV charge at 5 mV for the twelfth cycle), Oto 1.5 V. (Adapted from Sakaebe, Matsumoto,... Figure 14.10 Galvanostatic charge-discharge curves for the initial 12 cycles of Li/0.4mol drrr LiTFSI in PP13-TFSI/ MCMB2800 cell at C/10 current rate (CCr arge for initial 11 cycles and CCCV charge at 5 mV for the twelfth cycle), Oto 1.5 V. (Adapted from Sakaebe, Matsumoto,...
Monomer II is also a polymerizable IL composed of quatemized imidazoliimi salt, as shown in Figure 29.1. This monomer is liquid at room temperature and shows a Tg only at —70°C. Its high ionic conductivity of about 10 S cm at room temperature reflects a low Tg. Although the ionic conductivity of this monomer decreased after polymerization as in the case of monomer I, it was considerably improved by the addition of a small amount of LiTFSI. Figure 29.3 shows the effect of LiTFSI concentration on the ionic conductivity and lithium transference number ( Li ) for polymer II. The bulk ionic conductivity of polymer II was 10 S cm at 50°C. When LiTFSI was added to polymer 11, the ionic conductivity increased up to 10 S cm After that, the ionic conductivity of polymer II decreased gradually with the increasing LiTFSI concentration. On the other hand, when the LiTFSI concentration was 100 mol%, the of this system exceeded 0.5. Because of the fixed imidazolium cations on the polymer chain, mobile anion species exist more than cation species in the polymer matrix at this concentration. Since the TFSI anions form the IL domain with the imidazolium cation, the anion can supply a successive ion conduction path for the lithium caiton. Such behavior is not observed in monomeric IL systems, and is understood to be due to the concentrated charge domains created by the polymerization. [Pg.349]

In fact it is hard to measure the intrinsic anodic behavior of LLMOj, cathode materials in standard electrolyte solutions because at too high potentials the anodic reactions of solution species may dominate the potentio-dynamic response. However, ionic liquid solutions based on quaternary ammonium cations, TFSI anion, and LiTFSI salt demonstrate very high anodic stability. The passivation of Al current collector is excellent in these solutions. So, the anodic stability of Al... [Pg.304]

The mechanism of lithium transport was also studied in [pyri3][TFSI] + 0.25 LiTFSI [86]. The LL cation transport was found to occur primarily by exchanging TFSF anions in the first coordination shell of a LL with a smaller ( 30%) contribution also due to Li" cations diffusing together with their first coordination shell. It is important to note that despite high conductivity of IL-based electrolytes ( 10 S/cm) the hthium contribution to the charge transport remains quite low. [Pg.220]

In fact, conductivity due to the Li" cation transport only in [pyri3][TFSI] + 0.25 LiTFSI was found to be somewhat greater than that for a model poly(ethylene oxide)(PEO-based)/LiTFSI polymer electrolyte but 1-2 orders of magnitude lower than conductivity of ethylene carbonate/LiTFSI liquid electrolyte depending on temperature [86]. [Pg.221]

Figure 8.7 Galvanostatic discharge-charge curves (a) and cycling performance (h) of the Li PAF-S cell at a rate of 0.05 C in 0.5 M LiTFSI-MPPY TFSI at 50 °C. Reproduced from ref. 79 with permission from The Royal Society of Chemistry. Figure 8.7 Galvanostatic discharge-charge curves (a) and cycling performance (h) of the Li PAF-S cell at a rate of 0.05 C in 0.5 M LiTFSI-MPPY TFSI at 50 °C. Reproduced from ref. 79 with permission from The Royal Society of Chemistry.
These two effects were clearly seen in a study undertaken by Kara et al. [36]. In their work, PPy doped with bis(trifluoromethanesulfonyl)imide (TFSI) was actuated in various water/propylene carbonate (PC) solutions containing LiTFSI. The optimum performance of 23.6 % maximum strain at a strain rate of 10.8 % s was achieved within an actuation solution that consisted of 60 % water and 40 % PC. Improvements in both the strain rate and the maximum strain were seen with actuation in LiTFSI electrolytes of water/PC blended solvents over actuation in electrolytes of either water or PC alone. The improved actuation was attributed to the fact that a greater swelling occurred from the PC solvent (enabling a faster and easier ion transfer) and an improvement in the ionic conductivity from the water solvent (enabling a better charge transfer). As such, the optimised performance for this system was realised at 40 % PC. [Pg.207]

In the present study, electrodeposition of Mg was investigated in a eutectic LiTFSI-CsTFSI melt at 150-200 °C. The eutectic LiTFSI-CsTFSI (0.07/0.93, mole fraction) possesses a low melting point of 112°C and good ionic conductivity (18.4mScm at 150°C) [18]. As magnesium ion sources, we tested Mg(CF3S03)2, MgCl2, and Mg(TFSI)2. [Pg.366]

CsTFSI was prepared by neutralization of an ethanol solution of HTFSI (Morita Chemical Industries Co., Ltd, purity > 99%) with cesium carbonate (Aldrich purity > 99.5%) and then dried under vacuum for three days at 115 °C. Mg(TFSI)2 was prepared by neutralization of an ethanol solution of HTFSI with magnesium carbonate (Wako Pure Chemical Industries, Ltd. purity > 99%) and then dried under vacuum for three days at 215 °C. Other chemicals were commercially available and used after appropriate drying treatments. The electrolyte was prepared by mixing LiTFSI (Morita Chemical Industries Co., Ltd purity > 99%) and CsTFSI in a eutectic composition (LiTFSI CsTFSI = 0.07 0.93/mole fraction) in an alumina crucible with high purity. A chromel-alumel thermocouple was used for temperature measurement. [Pg.366]

Figure 5.4.2 Cyclic voltammograms for a nickel electrode in LiTFSI-CsTFSI before and after adding 1 mol% of Mg(TFSI)2 at I50°C. Scan rate 50mVs ... Figure 5.4.2 Cyclic voltammograms for a nickel electrode in LiTFSI-CsTFSI before and after adding 1 mol% of Mg(TFSI)2 at I50°C. Scan rate 50mVs ...
Figure 5.4.4 An Mg 2p XPS spectrum of the deposit on a Ni electrode prepared by potentiostatic electrolysis at 0.25 V versus LC/Li for I h in LiTFSI-CsTFSI-Mg(TFSI)2 (2mol% added) melt at 200°C. Argon ion etching time 720 s... Figure 5.4.4 An Mg 2p XPS spectrum of the deposit on a Ni electrode prepared by potentiostatic electrolysis at 0.25 V versus LC/Li for I h in LiTFSI-CsTFSI-Mg(TFSI)2 (2mol% added) melt at 200°C. Argon ion etching time 720 s...
Metallic magnesium was successfully deposited by potentiostatic electrolysis in a LiTFSI-CsTFSI eutectic melt containing Mg(TFSI)2 (2 mol% added) at 200 C. The combination of a Mg(TFSI)2 ion source and an elevation of temperature is preferable for magnesium deposition in a LiTFSI-CsTFSI eutectic melt. [Pg.371]

Fig. 10 Crystal structure of PE06 (LiAsF6)i-x(LiTFSI)x. Blue spheres Li ions Pink structures a AsFe anion mixed colors structure b TFSI anion. Taken from Ref. [68] with the permission of the publisher (Color figure online)... Fig. 10 Crystal structure of PE06 (LiAsF6)i-x(LiTFSI)x. Blue spheres Li ions Pink structures a AsFe anion mixed colors structure b TFSI anion. Taken from Ref. [68] with the permission of the publisher (Color figure online)...

See other pages where LiTFSI/ TFSI is mentioned: [Pg.210]    [Pg.181]    [Pg.75]    [Pg.180]    [Pg.180]    [Pg.182]    [Pg.251]    [Pg.252]    [Pg.256]    [Pg.333]    [Pg.352]    [Pg.181]    [Pg.97]    [Pg.9]    [Pg.34]    [Pg.301]    [Pg.305]    [Pg.385]    [Pg.386]    [Pg.212]    [Pg.217]    [Pg.218]    [Pg.220]    [Pg.220]    [Pg.221]    [Pg.443]    [Pg.205]    [Pg.683]    [Pg.260]    [Pg.368]    [Pg.368]    [Pg.370]   
See also in sourсe #XX -- [ Pg.547 ]




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