LiTFSI

The interfacial properties of gel electrolytes containing ethylene carbonate immobilized in a polyacrylonitrile (PAN) matrix with a lithium (bis)trifluoromethane sulfonimide (LiTFSI) salt have been studied 1139]. SEI stability appeared to be strongly dependent on the LiTFSI concentration. A minimum value of / SE1 of about 1000 Qcm2 was obtained after 200h... 

The lithium transference number calculated for 7/LiTFSI was 0.47 at 30°C, showing that anions were effectively trapped by methoxyboron unit. 

Interestingly, the nonpolyether-type polymer electrolyte 7 showed a relatively high lithium transference number of 0.47 in the presence of LiTFSI. This is possibly due to the absence of strong binding of ether oxygen to the lithium cation. Moreover, anion trapping of the boron atom is not retarded by coordination of oxygen to the... 

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

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 14.10 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 20.4 DSC chart of zwitterion 10 with an equimoiar amount of LiTFSI. ...

Figure 20.6 Relation between Tg and the ionic conductivity for zwitterions containing an equimolar LiTFSI.

The idea of developing a zwitterionic liquid (ZIL) for alkali metal transport has led to the consideration of a new cation conductive material. As shown in Chapter 20, an increase in cation conduction occurs when LiTFSI is added to ZILs. An equimolar mixture of ZIL and LiTFSI may give us a new model, namely on imidazolium cation containing two tethered anions. This novel system, called triple ion-type imidazolium salt, consists of three charges. Scheme 21.3 shows the structure of such triple ion-type imidazolium salts. These salts are prepared by the reaction of an imidazole analogue with an alkane sultone (see Chapter 20). Besides the imidazolium cation having two tethered sulfonate anions, this salt has a target carrier cation... 

Figure 27.3 Temperature dependence of ionic conductivity for the P(VdF-co-HFP)/equimolar mixture of Elm3S and LiTFSI. The ratio ofpoiymer to ZIL is fixed at 1 2 by weight.

Several polymer gel electrolytes were prepared by changing the mixing ratio of ZILs to polymer. The polymer gel electrolytes were obtained as translucent films up to 80 wt% of the ZIL/LiTFSI content. When the content of the ZIL/LiTFSI mixture was less than 40wt%, they were obtained as flexible but white films. Figure 27.4 shows the effect of ZIL/LiTFSI mixture content on the ionic conductivity for polymer gel electrolytes. The ionic conductivity of these polymer gel... 

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