Papers by Keyword: Proton Conduction

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Authors: Kuldeep Mishra, D.K. Rai
Abstract: Dielectric properties of proton conducting polymer electrolyte system, containing polyethylene oxide (PEO) as host polymer and ammonium hexfluorophosphate (NH4PF6) as complexing salt plasticized with EC and EC:PC, are investigated. The free standing films of thickness ~ 200 - 300µm are synthesized by solution casting technique. The electrical conductivity studies show that plasticization of the polymer electrolyte results into an enhancement in its conductivity by about two orders of magnitude. The maximum room temperature bulk conductivity is obtained to be ~ 10-5 S/cm for the plasticized polymer electrolyte. To understand the ion transport mechanism, different frequency dependent parameters are measured like dielectric permittivity, loss tangent and AC conductivity. The ionic transference number of the prepared systems is found to be close to unity which shows ion dominant charge transport in the electrolyte system. The conductivity of the polymer electrolyte has been found to be very sensitive to the relative humidity, which makes it a good candidate for its application for humidity sensor.
278
Authors: Norihiko Fukatsu, Hideki Masuoka, Hideki Kato, Noriaki Kurita
Abstract: In order to clarify the validity of the model of crystal defects that was proposed by the authors to explain the electrochemical properties of the proton conducting oxide, the total electrical conductivity of the sintered sample of SrCe0.95Yb0.05O3-X was measured under the controlled oxygen and hydrogen potentials. The results show that the dependence of conductivity on the potentials is reasonably explained by the reported defect model.
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Authors: H.J. Kleebe, D. Zhong, E.D. Steffee, W.G. Coors
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Authors: Li Qiang Guo, Zhao Jun Guo, Yuan Yuan Yang, Ju Mei Zhou
Abstract: P-doped SiO2 were prepared by PECVD and one metal shadow mask self-assembled method was used for fabricating oxide thin film transistors gated by such proton conductors. Proton conduction of these films was demonstrated and electrical characteristics of oxide thin film transistors gated by such proton conductors were discussed. Due to excellent proton conduction and big capacitance density, oxide thin film transistors gated by such proton conductors have obtained excellent performances with mobility of 48.39 cm2/Vs, threshold voltage of-0.36 V, subthreshold swing of 0.13 V/decade, Ion/off ratio of 3.2×106 with the relative humidity of 30% at the room temperature.
660
Authors: T. Akamatsu, Toshihiro Kasuga, Masayuki Nogami, Dörte Stachel
Abstract: When fine-sized 45ZnO·55P2O5 or 50ZnO·50P2O5 glass powders were mixed with distilled water, hydration immediately occurred, resulting in the formation of viscous hydrogels. 31P MAS-NMR spectra showed that the hydrogels contain orthophosphates and long-chain phosphates; no significant differences in their structures between the hydrogels were shown. The 45ZP gel and 50ZP gel showed high conductivities (e.g., 9.9 and 2.8 mS/cm, respectively, at 30°C). The conductivities were related to the proton amount in the hydrogel; the amount in the 45ZP gel was larger than that in the 50ZP gel. Electric double-layer capacitors (EDCs) were prepared using electrolytes consisting of the hydrogels. The specific capacities of the EDC cell for the 45ZP gel and 50ZP gel were 2.40 and 2.06 F/g, respectively. The possibility as an EDC electrolyte may be related to proton conductivities of the hydrogels.
153
Authors: H. Matsui, M. Tadokoro
Abstract: Triple Layered Hydration Structure Called Water Nanotube Is Formed in the Nanochannel of New Molecular Porous Crystal {[CoIII(H2bim)3](TMA) 20H2O}n. The Formation of Regulated Water Network Is Identified by the Infrared Spectroscopy, X-Ray and Neutron Crystal-Structure Analyses. Furthermore, the High Conductivity Exhibiting Activation-Type Behavior Has Been Observed by the Microwave Measurement Employing Single Crystal with Millimeter-Order Length. According to the Observation of Strong Isotope Effect and Distinct Anisotropic Conduction, the Water Nanotube Is Confirmed to Be a Quasi One-Dimensional High Proton Conductor.
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