Conductivity studies on solid polymer electrolytes

Sequeira, C. A. C.; Plancha, Maria João; Araújo, Luis Pires

doi:10.1051/jp4:1994102

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…The value of C in a typical blocking-electrode conductivity cell is largely controlled by the geometric cellcapacitance, and hence by the electrode configuration. 37 Consistent with this description, C remained in the nF regime, essentially independent of the applied temperature variations.…”

Section: Impedance Spectroscopic Measurement Of Ionic Conductivitysupporting

confidence: 63%

Ionic liquids with fluorinated block-oligomer tails: Influence of self-assembly on transport properties

Ganapatibhotla

Zheng

et al. 2011

J. Mater. Chem.

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A novel imidazolium iodide ionic liquid with an u-perfluoroalkyl poly(ethylene glycol) (PEG) tail attached to the imidazolium ring has been synthesized for its potential incorporation as an electrolyte in dye-sensitized solar cells. The ionic liquid molecules, with block oligomer tails, self-assembled to form a solvent-free ionic gel, without the assistance of an external gelator or an immobilizing matrix. The solidification was evidently facilitated by the generation of ionic clusters due to electrostatic interactions, as well as microphase separation of the immiscible perfluoroalkyl and PEG segments of the cation. We report herein the synthesis and electrochemical properties of this block oligomer ionogel, along with the results of self-consistent mean field calculations probing the formation of nanostructures in the ionogel. Although properties such as high viscosity and high ionic conductivity appear incompatible, it is shown that a nano-structured fluid can support high iodide diffusion at low effective fluidity, and that the formation of an organic alloy, by simple blending of two imidazolium iodide salts, can produce significant conductivity enhancements without lowering the viscosity.

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Section: Impedance Spectroscopic Measurement Of Ionic Conductivitysupporting

confidence: 63%

Ionic liquids with fluorinated block-oligomer tails: Influence of self-assembly on transport properties

Ganapatibhotla

Zheng

et al. 2011

J. Mater. Chem.

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“…They: (i) favor the formation of the salt complex, leaving a film depleted in free polymer; (ii) hinder complete salt dissociation; (iii) facilitate the formation of ionic multiplets, such as triplets (X-M+ X-, M+ X-M+) and quartets (M+ X-M+ X-), which are less mobile than free ions, which decreases their effective concentration; (iv) diminish the number of vacancies available for ionic transport. All of these effects contribute together to the low conductivities observed at higher salt concentration [17]. Figure 3(b) illustrates the temperature dependence of the conductive ity of the sample B.…”

Section: Resultsmentioning

confidence: 96%

Poly(Acrylamide-Co-Acrylic Acid)-Zinc Acetate Polymer Electrolytes: Studies Based on Structural and Morphology and Electrical Spectroscopy

Hassan¹,

Yusof²

2014

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Solid polymer electrolytes (SPEs) of polyacrylamide-co-acrylic acid (PAA) as the polymer host and zinc acetate (ZnA) as an ionic dopant were prepared using a single solvent by the solution casting technique. The amorphous and crystalline structures of film were investigated by X-ray diffraction (XRD). The surface morphology of samples was examined by scanning electron microscopy (SEM). The composition and complex formation of films were characterized by Fourier transform infrared (FTIR) spectroscopy. The conductivity of the PAA-ZnA films was determined by electrochemical impedance spectroscopy. According to the XRD and FTIR analyses, all electrolyte films were in amorphous state and the existence of interaction between Zn 2+ cations and the PAA structure confirms that the film was successfully prepared. The SEM observations reveal that the electrolyte films appeared to be rough and flat with irregularly shaped surfaces. The highest ionic conductivity (σ) of 1.82 × 10 − 5 Scm −1 was achieved at room temperature (303 K) for the sample containing 10 wt % ZnA.

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“…PEs as part of an innovative class of materials are widely applied in devices [26]. Many investigational studies have confirmed the importance of adding low molecular weight plasticizers into the PEs for enhancing ion migration [27].…”

Section: Impedance Studymentioning

confidence: 99%

A Polymer Blend Electrolyte Based on CS with Enhanced Ion Transport and Electrochemical Properties for Electrical Double Layer Capacitor Applications

et al. 2021

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The fabrication of energy storage EDLC in this work is achieved with the implementation of a conducting chitosan–methylcellulose–NH4NO3–glycerol polymer electrolyte system. The simple solution cast method has been used to prepare the electrolyte. The impedance of the samples was fitted with equivalent circuits to design the circuit diagram. The parameters associated with ion transport are well studied at various plasticizer concentrations. The FTIR investigation has been done on the films to detect the interaction that occurs among plasticizer and polymer electrolyte. To get more insights into ion transport parameters, the FTIR was deconvoluted. The transport properties achieved from both impedance and FTIR are discussed in detail. It was discovered that the transport parameter findings are in good agreement with both impedance and FTIR studies. A sample with high transport properties was characterized for ion dominancy and stability through the TNM and LSV investigations. The dominancy of ions in the electrolyte verified as the tion of the electrolyte is established to be 0.933 whereas it is potentially stable up to 1.87 V. The rechargeability of the EDLC is steady up to 500 cycles. The internal resistance, energy density, and power density of the EDLC at the 1st cycle are 53 ohms, 6.97 Wh/kg, and 1941 W/kg, respectively.

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Conductivity studies on solid polymer electrolytes

Cited by 7 publications

References 2 publications

Ionic liquids with fluorinated block-oligomer tails: Influence of self-assembly on transport properties

Ionic liquids with fluorinated block-oligomer tails: Influence of self-assembly on transport properties

Poly(Acrylamide-Co-Acrylic Acid)-Zinc Acetate Polymer Electrolytes: Studies Based on Structural and Morphology and Electrical Spectroscopy

A Polymer Blend Electrolyte Based on CS with Enhanced Ion Transport and Electrochemical Properties for Electrical Double Layer Capacitor Applications

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