An experimental investigation of ionic transport properties in CuI–Ag2WO4 and CuI–Ag2CrO4 mixed systems

Suthanthiraraj, S. Austin; Premchand, Y. Daniel

doi:10.1016/j.jssc.2004.07.053

Cited by 9 publications

(4 citation statements)

References 31 publications

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“…where t denotes the thickness of the sample pellet and A its area of cross-section. It is also obvious from figure 4 that the point of intersection on the real axis is shifted towards origin and the diameter of the semicircular arc decreases with increase in temperature and hence the value of bulk resistance (R b ) decreases at elevated temperatures which in turn leads to an increase in the electrical conductivity value with increase in temperature (Suthanthiraraj and Premchand 2004). The experimentally determined σ 298 K values for nine different compositions of the mixed system having x = 0•9, 0•8, 0•7, 0•6, 0•5, 0•4, 0•3, 0•2 and 0•1 mole fraction were found to be 3…”

Section: Electrical Conductivity and Ionic Transport Number Resultsmentioning

confidence: 97%

“…0•99). These features clearly show that major contribution to the total electrical conductivity in the chosen system may be due to silver ions only as in the case of similar systems such as AgI-Ag 2 CrO 4 (Durga Rani and Hariharan 1996), CuI-Ag 2 MoO 4 (Viswanathan and Suthanthiraraj 1992), PbI 2 -Ag 2 O-WO 3 (Suthanthiraraj and Vinod Mathew 2005), Cu 1−x Ag x I-Ag 2 O-B 2 O 3 , CuI-Ag 3 AsO 4 (Rivolta et al 1988), CuI-Ag 2 WO 4 and CuI-Ag 2 CrO 4 (Suthanthiraraj and Premchand 2004). It is evident from the present XRD and DSC data that AgI exist as one of the constituent phases in the case of compositions having x = 0•1, 0•2 and 0•3 mole fractions.…”

Section: Electrical Conductivity and Ionic Transport Number Resultsmentioning

confidence: 99%

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Structural characterization and complex impedance studies on fast ion conducting mixed system (SbI3) x –(Ag2CrO4)1−x

Suthanthiraraj

Sarojini²

2013

Bull Mater Sci

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This paper deals with preparation and physico-chemical characterization of a new mixed system, (SbI 3) x-(Ag 2 CrO 4) 1−x (0•1 ≤ x ≤ 0•9), undertaken with a view to evaluate silver ion transport properties and identify those fast ion conducting compositions. Polycrystalline samples of various compositions were synthesized by rapid melt-quenching method. Powder X-ray diffraction (XRD) analysis in conjunction with differential scanning calorimetry (DSC) and electrical transport evaluation involving silver ionic transport number and temperaturedependent electrical complex impedance measurements were carried out in order to identify the different phases responsible for the conduction mechanism. Realization of a fast ionic conductivity value of 3•2 × 10 −2 S cm −1 in the case of the composition, (SbI 3) 0•3-(Ag 2 CrO 4) 0•7 , at room temperature due to silver ion transport has been discussed in terms of observed structural and thermal characteristics. A detailed analysis of conductivity spectra pertaining to the best conducting system, (SbI 3) 0•3-(Ag 2 CrO 4) 0•7 , has also been presented.

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Section: Electrical Conductivity and Ionic Transport Number Resultsmentioning

confidence: 97%

Section: Electrical Conductivity and Ionic Transport Number Resultsmentioning

confidence: 99%

Structural characterization and complex impedance studies on fast ion conducting mixed system (SbI3) x –(Ag2CrO4)1−x

Suthanthiraraj

Sarojini²

2013

Bull Mater Sci

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“…Heterogeneous doping technique has been adopted to arrive at a number of binary and ternary composite solid electrolyte systems with Ag + ions as the mobile species. Movalent (Cu + , Na + , Li + ) [5][6][7][8][9][10][11] and divalent(Pb 2+ , Cd 2+ , Mg 2+ ) [12][13][14][15][16] iodide dopants have been used in various silver oxysalt and silver oxide host matrices to synthesize AgI within such composite solid electrolyte systems in order to achieve electrical conductivity at room temperature comparable to that exhibited by AgI at higher temperatures(147 o C). Such silver ion composite systems developed have proved to offer potential solid electrolyte sources for the fabrication of all-solid-state batteries.…”

Section: Introductionmentioning

confidence: 99%

Electrical Modulus and Dielectric Relaxation Studies on Solid Electrolyte System (BiI3)0.4-(Ag3PO4)0.6

Saleem¹,

Suthanthiraraj²

2014

Chem Sci Trans

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The a.c. impedance analysis technique has been used to investigate the dynamic and relaxation behavior of mobile Ag + ions in the case of the best conducting composition (BiI 3) 0.4-(Ag 3 PO 4) 0.6 which exhibited the highest value of electrical conductivity (3.0x10-3 S/cm) at room temperature (298 K) among the various compositions, previously examined by the authors, within a silver ion conducting multiphase system (BiI 3) x-(Ag 3 PO 4) (1-x) (where 0.1≤ x ≤ 0.9 mole fraction). The experimental data derived from a.c. impedance measurements carried out at various frequencies ranging from 20 Hz to 1 MHz over the temperature domain 298 to 433 K have revealed that the chosen solid electrolyte system exhibits an a.c. conductivity behavior in accordance with Jonscher's universal power law. The dielectric response and analyses of normalized impedance and modulus spectra tend to indicate the existence of more than one relaxation process occurring within the bulk material and confirm the superionic nature of the solid electrolyte sample (BiI 3) 0.4-(Ag 3 PO 4) 0.6 for feasible application in an all-solid-state electrochemical cell as well.

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“…More recently, the development of a new solid electrolyte system involving AgI, CuI and CdI 2 , and oxysalts [8][9][10][11][12], and [M 2 HgI 4 :0.2AgI] (where M = Ag, Cu, and Cd) doped with CuI, KI, and K 2 SO 4 [11][12][13] was attempted by many researchers. Therefore, in the present study, the investigations are focused on an alternative novel composite compound, [Cu 2 HgI 4 :0.2AgI]:0.xK 2 SO 4 (x=0.2, 0.4, and 0.6 mol.…”

Section: Introductionmentioning

confidence: 99%

Phase transition study in a [Cu2HgI4:0.2AgI] mixed composite system doped with K2SO4

Noorussaba

Ahmad

2011

Ionics

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Experimental MaterialSilver iodide (AgI) and mercury [I] iodide (HgI 2 ) were of CDH Analar grade, cuprous iodide (CuI) was obtained from S.D. Fine-Chem (India), and potassium sulfate (K 2 SO 4 ) was obtained from Qualigens with stated purity of 98%, 99%, 99%, and 99% each, respectively. Preparation and characterization of pure and doped samples Preparation of host [Cu 2 HgI 4 :0.2AgI] compositeThe samples were prepared by precipitation using previously described techniques as well as by solid-state reaction [15,16]. Cu 2 HgI 4 was prepared by solid-state reactions between CuI and HgI 2 [5]. 2CuI s ð Þ þ HgI 2 s ð Þ ! Cu 2 HgI 4 s ð Þ

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An experimental investigation of ionic transport properties in CuI–Ag2WO4 and CuI–Ag2CrO4 mixed systems

Cited by 9 publications

References 31 publications

Structural characterization and complex impedance studies on fast ion conducting mixed system (SbI3) x –(Ag2CrO4)1−x

Structural characterization and complex impedance studies on fast ion conducting mixed system (SbI3) x –(Ag2CrO4)1−x

Electrical Modulus and Dielectric Relaxation Studies on Solid Electrolyte System (BiI3)0.4-(Ag3PO4)0.6

Phase transition study in a [Cu2HgI4:0.2AgI] mixed composite system doped with K2SO4

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