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Ionic conductivity
About: Ionic conductivity is a research topic. Over the lifetime, 19412 publications have been published within this topic receiving 519167 citations.
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TL;DR: In this article, the authors developed easy-to-use methods to incorporate ionic liquids into a polymer matrix to synthesize gel polymer electrolytes (GPEs), which are used to fabricate solid-state ultracapacitors that demonstrate improved performance and cycle life.
Abstract: Electrolytes are an important component in determining the performance and cycle life of ultracapacitors. Good electrolytes should have high ionic conductivity, large electrochemical windows, and excellent thermal and chemical stability. Ionic liquids are possibly ideal electrolytes to satisfy these requirements. In the present work, we developed easy-to-use methods to incorporate ionic liquids into a polymer matrix to synthesize gel polymer electrolytes (GPEs). Combining the advantages of both the ionic liquids and the conventional GPEs, the resultant solid-state ionic liquid-incorporated gel polymer electrolytes (ILGPEs) possess better properties than these two components considered individually. Our synthesized ILGPE films are flexible and mechanically strong and have a wide electrochemical window of 4 V, a high ionic conductivity up to 3.5 mS/cm (at room temperature), and a high thermal stability up to 350°C. These ILGPEs have been used to fabricate solid-state ultracapacitors that demonstrate improved performance and cycle life.
124 citations
TL;DR: In this paper, the authors proposed a host matrix for the preparation of polymer electrolytes (PEs) by activating with the nonvolatile and safe room temperature ionic liquid (RTIL), 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonylimide) (BMITFSI).
124 citations
TL;DR: In this paper, the specific Li-ionic conductivities of the lithium argyrodites Li7PS6 and Li6PS5X (X: Cl, Br, I) and their temperature dependences are measured by impedance spectroscopy using different electron-blocking and ion-blocking electrode systems.
Abstract: Possible three-dimensional diffusion pathways of lithium ions in crystalline lithium argyrodites are discussed based on earlier studies of local dynamics and site preferences. The specific Li-ionic conductivities of the lithium argyrodites Li7PS6 and Li6PS5X (X: Cl, Br, I) and their temperature dependences are measured by impedance spectroscopy using different electron-blocking and ion-blocking electrode systems. Measurements were carried out between 160 K and 550 K depending on the respective sample. Bulk and grain boundary contributions and the influence of sample preparation are discussed. Typical values for the ionic conductivities at room temperature are in the range 10–7 to 10–5 S· cm–1 and at 500 K between 10–6 and 10–3 S· cm–1. Thermal activation energies are in the range 0.16 to 0.56 eV. The electronic conductivity at room temperature was measured by polarization measurements for the samples Li6PS5X (X: Cl, Br) and was shown to be in the order of magnitude of 10–8 S· cm–1. Chemical diffusion coefficients of lithium were calculated based on the polarization measurements. For Li6PS5Br a high value of 3.5 × 10–6 cm2·s–1 was found.
124 citations
TL;DR: In this paper, the electrical properties of magnesium doped lanthanum silicates as an electrolyte for intermediate temperature solid oxide fuel cells (IT-SOFCs) have been investigated.
124 citations
TL;DR: In this paper, a composite electrolyte containing a Li/Na carbonate eutectic and a doped ceria phase is employed in a direct carbon fuel cell (DCFC).
124 citations