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https://www.readbyqxmd.com/read/28819968/popcorn-derived-porous-carbon-flakes-with-an-ultrahigh-specific-surface-area-for-superior-performance-supercapacitors
#1
Jianhua Hou, Kun Jiang, Rui Wei, Muhammad Tahir, Xiaoge Wu, Ming Shen, Xiaozhi Wang, Chuanbao Cao
Popcorn-derived porous carbon flakes (PCFs) have been successfully fabricated from the biomass of maize. Utilizing the "puffing effect", the nubby maize grain turned into materials with interconnected honeycomb-like porous structure composed of carbon flakes. The following chemical activation method enabled the as-prepared products to possess optimized porous structure for electrochemical energy storage devices, such as multi-layer flake-like structures, ultrahigh specific surface area (SBET: 3301 m2 g-1), a high content of micropores (microporous surface area of 95%, especially the optimized sub-nanopores with the size of 0...
August 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28816433/syndiotactic-polystyrene-based-ionogel-membranes-for-high-temperature-electrochemical-applications
#2
Prasad Raut, Wenfeng Liang, Yu-Ming Chen, Yu Zhu, Sadhan C Jana
This work focuses on ionogel membranes for use in Li-ion batteries fabricated from syndiotactic polystyrene (sPS) gels filled with ionic liquids (ILs). The aim is to increase the operating temperature of Li-ion batteries. s. Thermal stability and safe operation of Li-ion batteries are two key attributes for their success in hybrid vehicles and other high temperature applications. The volatility of the liquid electrolytes in current lithium-ion battery technology causes thermal runaway leading to fire, explosion, and swelling of the cell...
August 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28816321/transport-properties-and-ionicity-of-phosphonium-ionic-liquids
#3
F Philippi, D Rauber, J Zapp, R Hempelmann
Ionic liquids (ILs) are promising electrolytes and many efforts have been made in basic scientific research as well as in applied research. In this contribution, we synthesised a variety of partly novel phosphonium ILs with different anions as well as with different compositions and lengths of the side chains of the cations. We measured a variety of their important transport properties such as viscosity, conductivity and diffusivity by means of stress-controlled rheology, impedance spectroscopy and PFGSTE NMR diffusometry...
August 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28813141/weavable-conductive-yarn-based-nico-zn-textile-battery-with-high-energy-density-and-rate-capability
#4
Yan Huang, Wing Shan Ip, Yuen Ying Lau, Jinfeng Sun, Jie Zeng, Nga Sze Sea Yeung, Wing Sum Ng, Hongfei Li, Zengxia Pei, Qi Xue, Yukun Wang, Jie Yu, Hong Hu, Chunyi Zhi
With intrinsic safety and much higher energy densities than supercapacitors, rechargeable nickel/cobalt-zinc-based textile batteries are promising power sources for next generation personalized wearable electronics. However, high-performance wearable nickel/cobalt-zinc-based batteries are rarely reported because there is a lack of industrially weavable and knittable highly conductive yarns. Here, we use scalably produced highly conductive yarns uniformly covered with zinc (as anode) and nickel cobalt hydroxide nanosheets (as cathode) to fabricate rechargeable yarn batteries...
August 18, 2017: ACS Nano
https://www.readbyqxmd.com/read/28809533/in-situ-atomic-force-microscopic-studies-of-single-tin-nanoparticle-sodiation-and-desodiation-in-liquid-electrolyte
#5
Mo Han, Chenbo Zhu, Qing Zhao, Chengcheng Chen, Zhanliang Tao, Wei Xie, Fangyi Cheng, Jun Chen
Probing electrodes at a nanometer scale is challenging but desirable to reveal the structural evolution of materials in electrochemical reactions. Herein, we present an atomic force microscopic method for an in situ analysis of a single Sn nanoparticle during sodiation and desodiation, which is conducted in an aprotic liquid electrolyte akin to a real electrochemical environment of the Na-ion cells. The morphological evolution of different-sized single Sn nanoparticle is visualized during the charge/discharge cycles by using a homemade planar electrode...
August 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28806049/electrolytes-oral-electrolyte-solutions
#6
Lisa Harris
Oral electrolyte solutions are used widely for rehydration in diarrheal illness and to maintain hydration during vigorous exercise. In diarrheal illness, an oral rehydration solution (ORS) typically is preferred over intravenous fluids except for patients with severe dehydration. The preferred ORS is one similar to the glucose-containing reduced osmolarity World Health Organization ORS. There also are polymer-based solutions that use rice or wheat as the source of carbohydrates but these are not widely recommended...
August 2017: FP Essentials
https://www.readbyqxmd.com/read/28802194/direct-laser-writing-of-micro-supercapacitors-on-thick-graphite-oxide-films-and-their-electrochemical-properties-in-different-liquid-inorganic-electrolytes
#7
Rajesh Kumar, Ednan Joanni, Rajesh K Singh, Everson T S G da Silva, Raluca Savu, Lauro T Kubota, Stanislav A Moshkalev
In this article we demonstrate a simple approach to fabricate interdigitated in-plane electrodes for flexible micro-supercapacitors (MSCs). A nanosecond ultraviolet laser treatment is used to reduce and pattern the electrodes on thick graphite oxide (GO) freestanding films. These laser-treated regions obtained by direct writing provide the conducting channels for electrons in the capacitors. The electrochemical performance of the MSCs was evaluated in the presence of two different electrolytes and they exhibit characteristics of nearly electrical double layer capacitors...
August 3, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28801072/irinotecan-chemotherapy-induced-intestinal-oxidative-stress-underlying-causes-of-disturbed-mucosal-water-and-electrolyte-transport
#8
Kaïs Rtibi, Slimen Selmi, Dhekra Grami, Hichem Sebai, Mohamed Amri, Lamjed Marzouki
Irinotecan, a chemotherapy drug, can cause acute diarrhea immediately after administration. Hence, the present study was designed to investigate the gastrointestinal (GI) disturbances after an intraperitoneal (IP) administration of irinotecan in rats.Twenty Wistar rats were separated into two groups of ten. Group A was considered as a control group (NaCl, 0.9%). Group B was treated with irinotecan at a single dose of 200mgkg(-1). The rats were observed for defecation. For the enteropooling test, the animals were sacrificed by decapitation 1h post-treatment...
July 23, 2017: Pathophysiology: the Official Journal of the International Society for Pathophysiology
https://www.readbyqxmd.com/read/28795175/x-ray-reflectivity-reveals-ionic-structure-at-liquid-crystal-aqueous-interfaces
#9
James E Hallett, Dominic W Hayward, Thomas Arnold, Paul Bartlett, Robert M Richardson
Here X-ray reflectivity has been used to determine the structure of liquid crystal monolayers for different cyanobiphenyl homologues supported on aqueous solutions of two different salt species. Sodium iodide induces homeotropic ordering for all of the monolayer forming liquid crystal homologues studied here, and forms a Stern layer of iodide ions at the liquid crystal cyano headgroup, similar to the case of lipids or surfactants supported on electrolyte solutions. The liquid crystal headgroups were also found to penetrate into the water surface when binding with iodide ions...
August 10, 2017: Soft Matter
https://www.readbyqxmd.com/read/28793111/nursing-diagnosis-in-older-adults-with-chronic-kidney-disease-on-hemodialysis
#10
Mayara Cristina Debone, Elisângela da Silva Nunes Pedruncci, Maristela do Carmo Peterossi Candido, Sueli Marques, Luciana Kusumota
Objective: To identify the main nursing diagnoses (NSs) in older adult patients under hemodialysis treatment. Method: Exploratory research using case studies in data collection performed by interview and physical examination of older adults, in the first semester of 2016. Were included twenty-eight older adults undergoing chronic hemodialysis treatment who met the selection criteria. The analysis followed two steps (RISNER, 1990): Phase I - Data analysis and synthesis; and Phase II - Establishment of nursing diagnoses using the taxonomy of NANDA-I (2015)...
July 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28783039/highly-porous-carbon-with-large-electrochemical-ion-absorption-capability-for-high-performance-supercapacitors-and-ion-capacitors
#11
Shijie Wang, Rutao Wang, Yabin Zhang, Li Zhang
Carbon-based supercapacitors have attracted extensive attention as the complement to batteries owing to its durable lifespan and superiority in high-power-demand field. However, their widespread use is limited by the low energy storage density; thus, a high-surface-area porous carbon is urgently needed. Herein, a highly porous carbon with a Brunauer-Emmett-Teller specific surface area up to 3643 m<sup>2</sup> g<sup>-1</sup> has been synthesized by chemical activation of resourceful papayas for the first time...
August 7, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28782932/visualization-of-colloidal-nanocrystal-formation-and-electrode-electrolyte-interfaces-in-liquids-using-tem
#12
Zhiyuan Zeng, Wenjing Zheng, Haimei Zheng
Transmission electron microscopy (TEM) has become a powerful analytical tool for addressing unique scientific problems in chemical sciences as well as in materials sciences and other disciplines. There has been a lot of recent interest in the development and applications of liquid phase environmental TEM. In this Account, we review the development and applications of liquid cell TEM for the study of dynamic phenomena at liquid-solid interfaces, focusing on two areas: (1) nucleation, growth, and self-assembly of colloidal nanocrystals and (2) electrode-electrolyte interfaces during charge and discharge processes...
August 7, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28776952/how-a-transition-metal-ii-chloride-interacts-with-a-eutectic-alcl%C3%A2-based-ionic-liquid-insights-into-the-speciation-of-the-electrolyte-and-electrodeposition-of-magnetic-materials
#13
Giridhar Pulletikurthi, Bernd Weidenfeller, Andriy Borodin, Jan C Namyslo, Frank Endres
Electrostatic interactions are characteristic for ionic liquids, they play a pivotal role in determining the formation of species when solutes are dissolved in them. The formation of new species/complexes has been investigated for certain ILs. However, such investigations have not yet been focused on eutectic liquids, which get emerging interest as a promising class of ILs. These liquids (or Liquid Coordination Complexes, LCCs) are rather new and are composed of cationic and anionic chloro complexes of metals...
August 4, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28776501/electrochemical-impedance-spectroscopy-for-quantitative-interface-state-characterization-of-planar-and-nanostructured-semiconductor-dielectric-interfaces
#14
Andrew C Meng, Kechao Tang, Michael Braun, Liangliang Zhang, Paul C McIntyre
The performance of nanostructured semiconductors is frequently limited by interface defects that trap electronic carriers. However, high aspect ratio geometries dramatically increase the difficulty of using typical solid-state electrical measurements (multifrequency capacitance- and conductance-voltage testing) to quantify interface trap densities (D<sub>it</sub>). We report on electrochemical impedance spectroscopy (EIS) with liquid electrolytes providing conformal electrical contact to characterize the energy distribution of interface traps at metal oxide/semiconductor interfaces...
August 4, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28776071/towards-quantification-of-toxicity-of-lithium-ion-battery-electrolytes-development-and-validation-of-a-liquid-liquid-extraction-gc-ms-method-for-the-determination-of-organic-carbonates-in-cell-culture-materials
#15
Jenny Strehlau, Till Weber, Constantin Lürenbaum, Julia Bornhorst, Hans-Joachim Galla, Tanja Schwerdtle, Martin Winter, Sascha Nowak
A novel method based on liquid-liquid extraction with subsequent gas chromatography separation and mass spectrometric detection (GC-MS) for the quantification of organic carbonates in cell culture materials is presented. Method parameters including the choice of extraction solvent, of extraction method and of extraction time were optimised and the method was validated. The setup allowed for determination within a linear range of more than two orders of magnitude. The limits of detection (LODs) were between 0...
August 3, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28775347/liquid-metal-amoeba-with-spontaneous-pseudopodia-formation-and-motion-capability
#16
Liang Hu, Bin Yuan, Jing Liu
The unique motion of amoeba with a deformable body has long been an intriguing issue in scientific fields ranging from physics, bionics to mechanics. So far, most of the currently available artificial machines are still hard to achieve the complicated amoeba-like behaviors including stretching pseudopodia. Here through introducing a multi-materials system, we discovered a group of very unusual biomimetic amoeba-like behaviors of self-fueled liquid gallium alloy on the graphite surface immersed in alkaline solution...
August 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28773977/gold-nanoparticle-based-colorimetric-and-electrochemical-methods-for-dipeptidyl-peptidase-iv-activity-assay-and-inhibitor-screening
#17
Ning Xia, Xin Wang, Xiaojin Wang, Binbin Zhou
We presented the colorimetric and electrochemical methods for determination of the dipeptidyl peptidase-IV (DPP-IV) activity and screening of its inhibitor using gold nanoparticle (AuNP) as the probe. In the colorimetric assay, the substrate peptide with a sequence of Arg-Pro-Arg induced the aggregation and color change of AuNPs, whereas cleavage of the peptide by DPP-IV prevented the aggregation of AuNPs. Furthermore, the aggregation of AuNPs in the solution was easily initiated on a solid/liquid (electrode/electrolyte) surface, which induced a decrease in the electron-transfer resistance...
October 21, 2016: Materials
https://www.readbyqxmd.com/read/28770985/investigation-of-the-reversible-intercalation-deintercalation-of-al-into-the-novel-li3vo4-c-microsphere-composite-cathode-material-for-aluminum-ion-batteries
#18
Jiali Jiang, He Li, Jianxing Huang, Kun Li, Jing Zeng, Yang Yang, Jiaqi Li, Yunhui Wang, Jing Wang, Jinbao Zhao
The Li3VO4@C microsphere composite was first reported as a novel cathode material for rechargeable aluminum-ion batteries (AIBs), which manifests the initial discharge capacity of 137 mAh g(-1) and and remains at 48 mAh g(-1) after 100 cycles with almost 100% Coulombic efficiency. The detailed intercalation mechanism of Al into the orthorhombic Li3VO4 is investigated by ex situ X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) of Li3VO4@C electrodes and the nuclear magnetic resonance aluminum spectroscopy ((27)Al NMR) of ionic liquid electrolytes in different discharge/charge states...
August 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28762228/-a-systematic-review-and-meta-analysis-of-the-pros-and-cons-of-consuming-liquids-preoperatively
#19
Fang-Tzu Lin, Tsai-Rung Lin, Chia-Wei Liao, Shu-Hui Chen
BACKGROUND: Preoperative anesthesia long time fasting, may increase patient hemodynamic instability during surgery and may affect the patient's post-surgery electrolyte balance. No meta-analysis has been conducted to explore the effects of preoperative liquid intake amount on gastric fluid PH, gastric fluid volume, surgery inhalation of pulmonary complications, and patient self-perceptions quality of care systematic review and meta-analysis of the literature. PURPOSE: To assess the pros and cons of preoperative liquid intake using a systematic review of the literature...
August 2017: Hu Li za Zhi the Journal of Nursing
https://www.readbyqxmd.com/read/28760606/synthesis-analytical-characterization-and-capillary-electrophoretic-use-of-the-single-isomer-heptakis-6-o-sulfobutyl-beta-cyclodextrin
#20
Milo Malanga, Ida Fejős, Erzsébet Varga, Gábor Benkovics, András Darcsi, Julianna Szemán, Szabolcs Béni
This contribution reports the synthesis, characterization and capillary electrophoretic application of heptakis-(6-O-sulfobutyl-ether)-β-cyclodextrin sodium salt, (6-(SB)7-β-CD). The compound was obtained through a five-steps synthesis and it represents the first example of single-isomer sulfobutylated cyclodextrin that carries the negatively charged functions exclusively on its primary side and it is unmodified on the lower rim. The purity of each intermediate was determined by appropriate liquid chromatographic methods, while the isomeric purity of the final product was established by an ad-hoc developed HPLC method based on a CD-Screen-IEC column...
July 21, 2017: Journal of Chromatography. A
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