Vibrational spectroscopic and electrochemical characteristics of poly (propylene glycol)-silver triflate polymer electrolyte system

Abstract

Fourier transform infrared spectroscopic and electrochemical complex impedance studies have been carried out on a series of complexes containing poly (propylene glycol) of molecular weight 4,000 and silver triflate (AgCF 3 SO 3 ) salt corresponding to the ether oxygen to metal cation ratios (O : M) in the range 16:1 to 12:1. The formation of ion pairs and aggregates noticed in the case of specimens having high salt concentrations as well as the complete coordination of the cation with the ether oxygen at low salt concentrations within the PPG4000-AgCF 3 SO 3 polymer electrolyte system have been confirmed. The appearance of two weak triflate bands at 1,032 and 1,272 cm −1 in the absorption spectra in respect of low salt concentrations is indicative of the fact that triflate ions are free within the polymer matrix. The room temperature (298 K) electrical conductivity is found to increase with increasing ether oxygen content while exhibiting the maximum value of 7.1×10 −5 Scm −1 possibly due to silver ionic transport in the case of the typical composition having an O : M ratio of 16:1.

Structural and Conductivity Studies of Poly(Ethylene Oxide) – Silver Triflate Polymer Electrolyte System

“…Complexation of silver salt with PEO can be confirmed on the appearance of the peaks at 636 cm −1 which may be assigned to the  s (SO 3 ) mode of free triflate ion. It is also evident that the formation of the associated peak at 1028 cm −1 corresponds to the SO 3 symmetric mode [3]. The spectral features observed in the range of 945 (cm -1 ) Figure 1.…”

“…PEO is widely used as host polymer because of its ability to dissolve a wide variety of metal salt, good mechanical properties compared with those of other polymer host [1,2]. Interestingly, silver ionconducting polymer electrolytes based on PEO appear to be the most appropriate choice for various electrochemical applications [3]. As stated by most experimental work, cation mobility occurs in the amorphous phase and its diffusion occurs through a complex mechanism involving the PEO segmental mobility.…”

Self-Assembly Processes in Hydrated Montmorillonite by FTIR Investigations

“…Such a spectroscopic technique explores 14000-10 cm -1 range of the e-m spectrum, which encompasses the Near-IR (NIR) range (14000-4000 cm −1 ), the Mid-IR (MIR) range (4000-400 cm −1 ), and the Far-IR (400-10 cm −1 ). FTIR is, in some regards, a complementary technique in respect to other techniques such as Raman and inelastic neutron spectroscopies and density function simulations [28,[41][42][43][44][45][46][47][48]. In the present study, the FTIR study was carried out in the range 400-4000 cm −1 with a spectral resolution of 4 cm −1 .…”

Ion dynamics and segmental relaxation of CeO 2 nanoparticles loaded soft - matter like gel polymer electrolyte

“…Moreover, the C-O-C stretching vibration is also changed with the environment of the salt and filler concentration. However, the band at 1110 cm −1 is more dominated in pure PPG 4000 and low salt concentration added electrolyte complex, whereas a new band arrived at 1106 cm −1 at higher salt concentration, which has been discussed in detail by us recently [17][18][19]. The same C-O-C band again shifted toward the lower wave number region ranging from 1110 to 1098 cm −1 associated with reduced intensity and the band become asymmetric too, with varying concentrations of CeO 2 filler particles is shown in Fig.…”