Ionic Conductivity of Bulk, Gels and Solutions of Perfluorinated Ionomer Membranes

Aldebert, P.; Guglielmi, Marina Nella; Pinéri, M.

doi:10.1295/polymj.23.399

Cited by 37 publications

(20 citation statements)

References 4 publications

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“…[21] Prior to use, the membranes were boiled in nitric acid, washed with distilled water, and dried. PTCBI was prepared and purified by a previously reported method.…”

Section: Methodsmentioning

confidence: 99%

A Full‐Spectrum Visible‐Light‐Responsive Organophotocatalyst Film for Removal of Trimethylamine

et al. 2011

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“…[21] Prior to use, the membranes were boiled in nitric acid, washed with distilled water, and dried. PTCBI was prepared and purified by a previously reported method.…”

Section: Methodsmentioning

confidence: 99%

A Full‐Spectrum Visible‐Light‐Responsive Organophotocatalyst Film for Removal of Trimethylamine

et al. 2011

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“…3,4,7 However, such batteries using liquid electrolytes show poor thermal stability and require relatively stringent safety precautions which make large-scale systems very complicated and expensive. [19][20][21][22][23] Recently, Navarrini et al synthesized a lithiated short side chain perfluorinated sulfonic ionomer and prepared a successive membrane by using the melt-press process. The current polymer electrolytes are mainly divided into several classes: (1) polymer-salt complexes; [8][9][10] (2) gel polymer electrolytes; [11][12][13] (3) polymerin-salt or rubbery electrolytes; 14,15 (4) composite or nanocomposite polymer electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Ion exchange membranes as electrolyte for high performance Li-ion batteries

Liu

Cai

Liu

et al. 2012

Energy Environ. Sci.

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High ionic conductivity exceeding 10 À3 S cm À1 at room temperature is achieved with lithiated perfluorinated sulfonic acid (PFSA-Li) ion exchange membranes by swelling in nonaqueous organic solvents. The dependence of ionic conductivity on the membrane equivalent weight, solvent uptake, solvent properties including viscosity and dielectric constant and temperature is investigated for PFSA-Li membranes. The high performance of Li-ion battery using the PFSA-Li membranes as both electrolyte and separator is demonstrated. This new battery shows very good thermal stability and cyclic performance as compared to conventional Li-ion battery using organic liquid electrolytes. At 55 C, this battery shows less than 3% discharge capacity loss over 120 cycles, however battery with liquid electrolyte decreased to 76% of the initial capacity after 80 cycles.Rechargeable Li-ion batteries (LIBs) are expected to be used more widely for hybrid electric vehicles, plug-in hybrid electric vehicles and electric vehicles due to their high intrinsic energy density and high voltage. For the construction of these batteries, the development of electrolytes, which ionically connect electrodes (cathode and anode), is essential. Most present commercial Li-ion batteries use liquid electrolytes. However, such batteries require relatively stringent safety precautions, making large-scale systems very complicated and expensive. The application of solid polymer electrolytes is currently limited because they cannot attain practically useful conductivity (10 À3 S cm À1 ) at room temperature. Here, we report that ion exchange membranes swollen with mixed non-aqueous organic solvents exhibit high Li ionic conductivity of 1.46 mS cm À1 at room temperature. A Li-ion polymer battery using ion exchange membranes as electrolyte shows excellent thermal stability and cyclic performance as compared to a Liion battery using liquid electrolytes.

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“…However, avoiding flooding by keeping the water activity below unity can dehydrate the membrane and reduce the proton conductivity. In addition, changes in the water activity result in dimensional changes of the polymer as the polymer absorbs water 9–14. Water sorption creates an internal pressure in the membrane that causes it to swell against the confinement of the electrodes 15.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of Nafion and titania/Nafion composite membranes for polymer electrolyte membrane fuel cells

Satterfield

Majsztrik

Ota

et al. 2006

J Polym Sci B Polym Phys

233

181

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Measurements of the mechanical and electrical properties of Nafion and Nafion/titania composite membranes in constrained environments are reported. The elastic and plastic deformation of Nafion-based materials decreases with both the temperature and water content. Nafion/titania composites have slightly higher elastic moduli. The composite membranes exhibit less strain hardening than Nafion. Composite membranes also show a reduction in the long-time creep of $40% in comparison with Nafion. Water uptake is faster in Nafion membranes recast from solution in comparison with extruded Nafion. The addition of 3-20 wt % titania particles has minimal effect on the rate of water uptake. Water sorption by Nafion membranes generates a swelling pressure of $0.55 MPa in 125-lm membranes. The resistivity of Nafion increases when the membrane is placed under a load. At 23 8C and 100% relative humidity, the resistivity of Nafion increases by $15% under an applied stress of 7.5 MPa. There is a substantial hysteresis in the membrane resistivity as a function of the applied stress depending on whether the pressure is increasing or decreasing. The results demonstrate how the dynamics of water uptake and loss from membranes are dependent on physical constraints, and these constraints can impact fuel cell performance.

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Ionic Conductivity of Bulk, Gels and Solutions of Perfluorinated Ionomer Membranes

Abstract: ABSTRACT:Perfluorinated ionomer membranes either sulfonated or carboxylated have been extensively studied in order to understand the relations between their structure and properties.

Cited by 37 publications

References 4 publications

A Full‐Spectrum Visible‐Light‐Responsive Organophotocatalyst Film for Removal of Trimethylamine

A Full‐Spectrum Visible‐Light‐Responsive Organophotocatalyst Film for Removal of Trimethylamine

Ion exchange membranes as electrolyte for high performance Li-ion batteries

Mechanical properties of Nafion and titania/Nafion composite membranes for polymer electrolyte membrane fuel cells

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