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liquid and electrolytes

Xiao-Li Sun, Wei-Hua Deng, Hui Chen, Hong-Liang Han, Jared M Taylor, Chong-Qing Wan, Gang Xu
To develop proton conducting materials under low humidity condition and moderate working temperature still remains challenging for fuel-cell technology. Herein, we show a new type of proton-conducting material, EIMS-HTFSA@MIL, which was prepared by impregnating binary ionic liquids, EIMS-HTFSA, into mesoporous metal-organic framework, MIL-101. Taking advantages of the ionic liquid, such as high thermal stability, non-volatility, non-flammability and low corrosivity, EIMS-HTFSA@MIL shows potential application on proton conduction above 100 oC as a safe electrolyte...
December 5, 2016: Chemistry: a European Journal
Arthur V Cresce, Selena M Russell, Oleg Borodin, Joshua A Allen, Marshall A Schroeder, Michael Dai, Jing Peng, Mallory P Gobet, Steven G Greenbaum, Reginald E Rogers, Kang Xu
Sodium ion batteries are on the cusp of being a commercially available technology. Compared to lithium ion batteries, sodium ion batteries can potentially offer an attractive dollar-per-kilowatt-hour value, though at the penalty of reduced energy density. As a materials system, sodium ion batteries present a unique opportunity to apply lessons learned in the study of electrolytes for lithium ion batteries; specifically, the behavior of the sodium ion in an organic carbonate solution and the relationship of ion solvation with electrode surface passivation...
December 5, 2016: Physical Chemistry Chemical Physics: PCCP
Michał Bielejewski, Andrzej Łapiński, Oleg Demchuk
Organic ionic gel (OIG) electrolytes, also known as gel electrolytes or ionogels are one example of modern functional materials with the potential to use in wide range of electrochemical applications. The functionality of OIGs arises from the thermally reversible solidification of electrolytes or ionic liquids and their superior ionic conductivity. To understand and to predict the properties of these systems it is important to get the knowledge about the interactions on molecular level between the solid gelator matrix and the electrolyte solution...
November 16, 2016: Journal of Colloid and Interface Science
Ana Luiza Sereia, Renata Longhini, Gisely Cristiny Lopes, João Carlos Palazzo de Mello
INTRODUCTION: The tree Trichilia catigua, popularly known as "catuaba", shows several biological activities and has emerged as a potential source of new drugs. Considering that more than 10 species are known under the same popular name, regulatory agencies require more rigorous quality control of this medicinal plant. OBJECTIVE: To develop and validate a methodology using capillary electrophoresis (CE) with ultraviolet (UV) detection for analysing polyphenols in the ethyl-acetate fraction (EAF) of Trichilia catigua...
December 2, 2016: Phytochemical Analysis: PCA
Volker Lesch, Hadrián Montes-Campos, Trinidad Méndez-Morales, Luis Javier Gallego, Andreas Heuer, Christian Schröder, Luis M Varela
We report a molecular dynamics study on the effect of electronic polarization on the structure and single-particle dynamics of mixtures of the aprotic ionic liquid 1-ethyl-3-methylimidazolium bis-(trifluoromethylsulfonyl)-imide ([EMIM][TFSI]) doped with a lithium salt with the same anion at 298 K and 1 bar. In particular, we analyze the effect of electron density fluctuations on radial distribution functions, velocity autocorrelation functions, cage correlation functions, mean-squared displacements, and vibrational densities of states, comparing the predictions of the quantum-chemistry-based Atomistic Polarizable Potential for Liquids, Electrolytes, & Polymers (APPLE&P) with those of its nonpolarizable version and those of the standard non-polarizable Optimized Potentials for Liquid Simulations-All Atom (OPLS-AA)...
November 28, 2016: Journal of Chemical Physics
S Harirforoosh, K O West, D E Murrell, J W Denham, P C Panus, G A Hanley
OBJECTIVE:  Celecoxib (CEL) is a nonsteroidal anti-inflammatory drug (NSAID) showing selective cycloxygenase-2 inhibition. While effective as a pain reducer, CEL exerts some negative influence on renal and gastrointestinal parameters. This study examined CEL pharmacodynamics and pharmacokinetics following drug reformulation as a poly(lactic-co-glycolic) acid nanoparticle (NP). MATERIALS AND METHODS: Rats were administered either vehicle (VEH) (methylcellulose solution), blank NP, 40 mg/kg CEL in methylcellulose, or an equivalent NP dose (CEL-NP)...
November 2016: European Review for Medical and Pharmacological Sciences
Mounesha Nagendrachar Garaga, Luis Aguilera, Negin Yaghini, Aleksandar Matic, Michael Persson, Anna Martinelli
We report a strategy to enhance the ionic mobility in an emerging class of gels, based on robust nanoporous silica micro-particles, by chemical functionalization of the silica surface. Two very different ionic liquids are used to fill the nano-pores of silica at varying pore filling factors, namely one aprotic imidazolium based (1-methyl-3-hexylimidazolium bis(trifluoromethanesulfonyl)imide, C6C1ImTFSI), and one protic ammonium based (diethylmethylammonium methanesulfonate, DEMAOMs) ionic liquid. Both these ionic liquids display higher ionic mobility when confined in functionalized silica as compared to untreated silica nano-pores, an improvement that is more pronounced at low pore filling factors (i...
December 1, 2016: Physical Chemistry Chemical Physics: PCCP
Svetoslava Vankova, Carlotta Francia, Julia Amici, Juqin Zeng, Silvia Bodoardo, Nerino Penazzi, Gillian Collins, Hugh Geaney, Colm O'Dwyer
Li-O2 battery research at a fundamental level remains critical, and nature of reactions and stability are paramount for realising the promise of the Li-O2 system. We report that ITO nanocrystals with supported 1-2 nm OER catalyst Ru/RuOx nanoparticles demonstrate efficient OER processes, significantly reducing the cell's recharge overpotential, and maintain catalytic activity to promote a consistent cycling discharge potential in Li-O2 cells even when the ITO support nanocrystals deteriorate from the very first cycle...
November 29, 2016: ChemSusChem
Maykel Hernández-Mesa, Carmen Cruces-Blanco, Ana M García-Campaña
A novel capillary electrophoresis-tandem mass spectrometry approach is proposed for the determination of eleven 5-nitroimidazoles in urine samples for therapeutical drug monitoring purposes. A comparison between two separation modes, namely micellar electrokinetic chromatography and capillary zone electrophoresis was carried out, obtaining higher selectivity when 1M formic acid (pH 1.8) was selected as background electrolyte. 5-Nitroimidazoles were hydrodynamically injected in water for 40s at 50mbar and their separation was performed at 28kV and 25°C...
January 15, 2017: Talanta
Behnoosh Sadeghi Moghadam, Mohammad Razmkhah, Mohammad Taghi Hamed Mosavian, Fatemeh Moosavi
Electric double layer (EDL) supercapacitors, using ionic liquid electrolytes, have been receiving a great deal of attention in response to the growing demand for energy storage systems. In the present study, the nanoscopic structure of amino acid ionic liquids (AAILs) as biodegradable electrolytes near a neutral graphene surface was studied by molecular dynamics (MD) simulation. In order to explore the influence of the anion type and structure, the effect of the alkyl side-chain length of amino acids on the EDL was investigated...
November 25, 2016: Physical Chemistry Chemical Physics: PCCP
Hye-Ryun Cho, Young-Sang Youn, Euo Chang Jung, Wansik Cha
The aim of this work is to determine the solubility product of plutonium hydroxide under reducing conditions and to ascertain the stability of Pu(OH)3 (am) in water. Hydrolysis of Pu(iii) and solubility of Pu(OH)3 (am) were investigated at a constant ionic strength of 0.1 M NaClO4. Coulometric titration was adopted to adjust the pH of plutonium solutions, during which the electrolytic reducing conditions maintained the oxidation state of Pu(iii). Chemical speciation for dissolved plutonium was investigated using sensitive spectrophotometry coupled with a liquid waveguide capillary cell...
November 25, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
A Gholamipour-Shirazi, M S Carvalho, M F G Huila, K Araki, P Dommersnes, J O Fossum
Colloidal clay in water suspensions are known to exhibit a multitude of bulk phases depending on initial colloidal concentration and ionic strength, and examples of this include repulsive Wigner colloidal glasses at low ionic strength and attractive gels at higher ionic strength due to screened electrostatic forces by the electrolyte. From confocal Raman microscopy combined with elasticity measurements, we infer that clay trapped at quasi two-dimensional interfaces between oil and water also exhibit confined glass-like or gel-like states...
November 24, 2016: Scientific Reports
Tsubasa Kobayashi, Takahiro Ichikawa, Takashi Kato, Hiroyuki Ohno
Glassy bicontinuous cubic liquid crystals are developed to be a matrix having a hydrophilic infinite periodic minimal surface (IPMS). They function as a scaffold for water, leading to the formation of a 3D continuous hydrogen-bonding network of water molecules along the IPMS. This material design is advantageous for developing novel electrolytes with rigidity and high proton conductivity.
November 24, 2016: Advanced Materials
A Ehsani, H Mohammad Shiri, E Kowsari, R Safari, J Torabian, S Hajghani
In this paper firstly, 1-methyl-3-methylimidazolium bromide (MB) as a new high efficient ionic liquid was synthesized using chemical approach and then fabricated POAP/MB films by electro-polymerization of POAP in the presence of MB to serve as the active electrode for electrochemical supercapacitor. Theoretical study (AIM) and electrochemical analysis have been used for characterization of ionic liquid and POAP/MB composite film. Different electrochemical methods including galvanostatic charge-discharge experiments, cyclic voltammetry and electrochemical impedance spectroscopy are carried out in order to investigate the performance of the system...
November 9, 2016: Journal of Colloid and Interface Science
Parameswara Rao Chinnam, Birane Fall, Dmitriy A Dikin, AbdelAziz Jalil, Clifton R Hamilton, Stephanie L Wunder, Michael J Zdilla
The preparation and characterization of the cocrystalline solid-organic sodium ion electrolyte NaClO4 (DMF)3 (DMF=dimethylformamide) is described. The crystal structure of NaClO4 (DMF)3 reveals parallel channels of Na(+) and ClO4(-) ions. Pressed pellets of microcrystalline NaClO4 (DMF)3 exhibit a conductivity of 3×10(-4)  S cm(-1) at room temperature with a low activation barrier to conduction of 25 kJ mol(-1) . SEM revealed thin liquid interfacial contacts between crystalline grains, which promote conductivity...
November 9, 2016: Angewandte Chemie
Sergej Rothermel, Marco Evertz, Johannes Kasnascheetw, Xin Qi, Martin Grützke, Martin Winter, Sascha Nowak
The present work reports on challenges in utilization of spent lithium-ion batteries (LIBs) - an increasingly important aspect associated with a significantly rising demand for electric vehicles (EVs). In this context, the feasibility of anode recycling in combination with three different electrolyte extraction concepts is investigated. The first method is based on a thermal treatment of graphite without electrolyte recovery. The second method additionally utilizes a liquid carbon dioxide-assisted electrolyte extraction prior to thermal treatment...
November 15, 2016: ChemSusChem
Hiroyuki Kaneko, Tsutomu Minegishi, Mamiko Nakabayashi, Naoya Shibata, Kazunari Domen
A (ZnSe)0.85 (CuIn0.7 Ga0.3 Se2 )0.15 photocathode with a bilayer structure was fabricated and found to exhibit a photocurrent almost twice that of a photocathode with a monolayer structure during hydrogen evolution from water. The cathodic photocurrent reached maximum values of 12 and 4.9 mA cm(-2) at 0 and 0.6 VRHE in a neutral phosphate buffer under simulated sunlight, while the half-cell solar-to-hydrogen conversion efficiency was 3.0 % at 0.6 VRHE , with a maximum value of 3.6 % at 0.45 VRHE ...
November 9, 2016: Angewandte Chemie
Peiling Lv, Takenori Ito, Akihide Oogushi, Kensaku Nakashima, Masahiro Nagao, Takashi Hibino
In recent years, exhaust sensors have become increasingly attractive for use in energy and environmental technologies. Important issues regarding practical applications of these sensors, especially for soot measurements, include the further development of ion-conductive electrolytes and active electrode catalysts for meeting performance and durability requirements. Herein, we design a proton conductor with a high breakdown voltage and a sensing electrode with high sensitivity to electrochemical carbon oxidation, enabling continuous soot monitoring with self-regeneration of the sensor...
November 18, 2016: Scientific Reports
Sarra Bouden, Antoine Dahi, Fanny Hauquier, Hyacinthe Randriamahazaka, Jalal Ghilane
The indium tin oxide (ITO) material has been widely used in various scientific fields and has been successfully implemented in several devices. Herein, the electrochemical reduction of ITO electrode in an organic electrolytic solution containing alkali metal, NaI, or redox molecule, N-(ferrocenylmethyl) imidazolium iodide, was investigated. The reduced ITO surfaces were investigated by X-ray photoelectron spectroscopy and grazing incident XRD demonstrating the presence of the electrolyte cation inside the material...
November 18, 2016: Scientific Reports
Douglas A C Coledam, Marília M S Pupo, Bianca F Silva, Adilson J Silva, Katlin I B Eguiluz, Giancarlo R Salazar-Banda, José M Aquino
The contamination of surface and ground water by antibiotics is of significant importance due to their potential chronic toxic effects to the aquatic and human lives. Thus, in this work, the electrochemical oxidation of cephalexin (CEX) was carried out in a one compartment filter-press flow cell using a boron-doped diamond (BDD) electrode as anode. During the electrolysis, the investigated variables were: supporting electrolyte (Na2SO4, NaCl, NaNO3, and Na2CO3) at constant ionic strength (0.1 M), pH (3, 7, 10, and without control), and current density (5, 10 and 20 mA cm(-2))...
November 12, 2016: Chemosphere
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