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1.971 Aktuelle Fachpublikationen zum Thema temperature

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Ionic‐Liquid‐Based Polymer Electrolytes for Battery Applications

19.11.2015 | Irene Osada, Henrik de Vries, Bruno Scrosati, Stefano Passerini, Angewandte Chemie International Edition, 2015

Abstract The advent of solid‐state polymer electrolytes for application in lithium batteries took place more than four decades ago when the ability of polyethylene oxide (PEO) to dissolve suitable lithium salts was demonstrated. Since then, many modifications of this basic system have been ...


The Dilemma of Supporting Electrolytes for Electroorganic Synthesis: A Case Study on Kolbe Electrolysis

19.11.2015 | Carolin Stang, Falk Harnisch, ChemSusChem, 2015

Abstract Remarkably, coulombic efficiency (CE, about 50 % at 1 Farad equivalent), and product composition resulting from aqueous Kolbe electrolysis are independent of reactor temperature and initial pH value. Although numerous studies on Kolbe electrolysis are available, the interrelations of ...


Tuning Electron-Conduction and Spin Transport in Magnetic Iron Oxide Nanoparticle Assemblies via Tetrathiafulvalene-Fused Ligands

19.11.2015 | Zhong-Peng Lv; Zhong-Zhi Luan; Hai-Ying Wang; Sheng Liu; Cheng-Hui Li; Di Wu; Jing-Lin Zuo; Shouheng Sun, ACS Nano, 2015

We report a strategy to coat Fe3O4 nanoparticles (NPs) with tetrathiafulvalene-fused carboxylic ligands (TTF-COO−) and to control electron conduction and magnetoresistance (MR) within the NP assemblies. The TTF-COO-Fe3O4 NPs were prepared by replacing oleylamine (OA) from OA-coated 5.7 nm Fe3O4 ...


SiO2/Ionic Liquid Hybrid Nanoparticles for Solid-State Lithium Ion Conduction

19.11.2015 | Sébastien Delacroix; Frédéric Sauvage; Marine Reynaud; Michael Deschamps; Stéphanie Bruyère; Matthieu Becuwe; Denis ..., Chemistry of Materials, 2015

We report the physical and electrical characterization of a series of substituted imidazolium-based ionic liquids grafted on Stöber-type SiO2. This hybrid architecture affords an increase of the lithium transference to 0.56 by hindering TFSI– (bis(trifluoromethane)sulfonimide) mobility to the ...


Enhanced O2 Flux of CaTi0.85Fe0.15O3−δ Based Membranes by Mn Doping

18.11.2015 | Jonathan M. Polfus, Wen Xing, Marit Riktor, Martin F. Sunding, Paul Inge Dahl, Sidsel M. Hanetho, Tommy Mokkelbost, ..., Journal of the American Ceramic Society, 2015

Dense symmetric membranes of CaTi0.85−xFe0.15MnxO3−δ (x = 0.1, 0.15, 0.25, 0.4) are investigated in order to determine the optimal Mn dopant content with respect to highest O2 flux. O2 permeation measurements are performed as function of temperature between 700°C–1000°C and as function of the ...


The behaviour of Nafion® 424 membrane in the electrochemical production of lithium hydroxide

18.11.2015 | Abdullah Zahid Turan, Halit Baloglu, Elif Ünveren, A. Nusret Bulutcu, Journal of Chemical Technology & Biotechnology, 2015

Abstract Background Nafion® membranes have found several applications in chemical processes, one of which is “salt splitting”, where a salt is split to produce acid and/or alkali. So, the determination of the behaviour of this membrane in the electrolysis of certain salts is an important ...


Effect of Structure on Transport Properties (Viscosity, Ionic Conductivity, and Self-Diffusion Coefficient) of Aprotic Heterocyclic Anion (AHA) Room-Temperature Ionic Liquids. 1. Variation of Anionic Species

18.11.2015 | Liyuan Sun; Oscar Morales-Collazo; Han Xia; Joan F. Brennecke, Journal of Physical Chemistry B, 2015

A series of room temperature ionic liquids (RTILs) based on 1-ethyl-3-methylimidazolium ([emim]+) with different aprotic heterocyclic anions (AHAs) were synthesized and characterized as potential electrolyte candidates for lithium ion batteries. The density and transport properties of these ILs ...


Poly(vinyl alcohol) modified by KE reactive dyes as a novel proton‐exchange membrane for potential fuel‐cell applications

17.11.2015 | Tianchi Zhou, Xuemei He, Kongliang Xie, Journal of Applied Polymer Science, 2015

ABSTRACT A new type of proton‐exchange membrane based on poly(vinyl alcohol) (PVA) modified KE reactive dyes (KE‐4BD) was prepared and evaluated as H+‐conducting polymer electrolytes. The effects of the content of KE‐4BD on the membrane H+ conductivity and water uptake were studied with an ...


Effect of Various Electrophoretic Deposition Nano‐silica Content on Properties of Poly (vinylidene fluoride‐co‐hexafluoropropylene)‐based Electrospun Polymer Electrolytes

17.11.2015 | Wei Xiao, Chang Miao, Xuemin Yan, Ping Mei, Polymer International, 2015

Abstract Poly (vinylidene fluoride‐co‐hexafluoropropylene) (P(VDF‐HFP))‐based composite polymer electrolyte (CPE) membranes are successfully prepared by electrospinning and then followed by electrophoretic deposition processes, and the desirable polymer electrolytes are obtained after being ...


Electrical properties of polyimide composite films containing TiO2 nanotubes

14.11.2015 | Marius Andrei Olariu, Corneliu Hamciuc, Lidia Okrasa, Elena Hamciuc, Lubomir Dimitrov, Yuri Kalvachev, Polymer Composites, 2015

A study on the dielectric behavior of polyimide composite films containing different amounts of TiO2 nanotubes (TNs) was performed. The films were prepared by casting solutions resulting from direct mixing of a poly(amic acid) and TNs onto glass plates, followed by thermal imidization. The ...


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