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https://www.readbyqxmd.com/read/28813140/robust-pitaya-structured-pyrite-as-high-energy-density-cathode-for-high-rate-lithium-batteries
#1
Xijun Xu, Jun Liu, Zhengbo Liu, Jiadong Shen, Renzong Hu, Jiangwen Liu, Liuzhang Ouyang, Lei Zhang, Min Zhu
To solve the serious problems (the agglomeration of nano-Fe0, dissolution of polysulfide and low electronic conductivity of Li2S) of earth-abundant pyrite (FeS2) cathode for lithium batteries, a simple in-situ encapsulation and transformation route has been successfully developed to synthesis pitaya-structured porous carbon embedded with FeS2 nanoparticles. Due to such hierarchical architecture design, this cathode of pitaya-structured FeS2@C can effectively avoid the serious agglomeration and coarsening of small Fe nanoparticles, reduce the dissolution of polysulfide and provide superior kinetics toward lithium storage, resulting in enhanced reversibility and rate capability...
August 16, 2017: ACS Nano
https://www.readbyqxmd.com/read/28812893/%C3%AE-sulfinyl-benzoates-as-precursors-to-li-and-mg-carbenoids-for-the-stereoselective-iterative-homologation-of-boronic-esters
#2
Giorgia Casoni, Murat Kucukdisli, James M Fordham, Matthew Burns, Eddie L Myers, Varinder K Aggarwal
The stereoselective reagent-controlled homologation of boronic esters is one of a small number of iteratable synthetic transformations that if automated could form the basis of a veritable molecule-making machine. Recently, α-stannyl triisopropylbenzoates and α-sulfinyl chlorides have emerged as useful building blocks for the iterative homologation of boronic esters. However, α-stannyl benzoates need to be prepared using stoichiometric amounts of the (+)- or (-)-enantiomer of the scarcely available and expensive diamine sparteine; also, these building blocks, together with the byproducts that are generated during homologation, are perceived as being toxic...
August 16, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28812873/ultrathin-manganese-based-metal-organic-framework-nanosheets-low-cost-and-energy-dense-lithium-storage-anodes-with-the-coexistence-of-metal-and-ligand-redox-activities
#3
Chao Li, Xiaoshi Hu, Wei Tong, Wensheng Yan, Xiaobing Lou, Ming Shen, Bingwen Hu
We herein demonstrate the fabrication of Mn- and Ni-based ultrathin metal-organic framework nanosheets with the same coordination mode (defined as 'Mn-UMOFNs' and 'Ni-UMOFNs', respectively) through an expedient and versatile ultrasonic approach, and scrutinize their electrochemical properties as anode materials for rechargeable lithium battery for the first time. The obtained Mn-UMOFNs with structure advantages over Ni-UMOFNs (thinner nanosheets, smaller metal-ion radius, higher specific surface area) exhibit high reversible capacity (1187 mAh g-1 at 100 mA g-1 for 100 cycles), excellent rate capability (701 mAh g-1 even at 2 A g-1), rapid Li+ diffusion coefficient (2...
August 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28812866/directly-coating-multifunctional-interlayer-on-the-cathode-via-electrospinning-for-advanced-lithium-sulfur-batteries
#4
Yueying Peng, Yiyong Zhang, Yunhui Wang, Xiu Shen, Feng Wang, He Li, Bing-Joe Hwang, Jinbao Zhao
Lithium sulfur battery is considered as a prospective candidate for high-energy-storage system as its high theoretical specific capacity and energy. However, the dissolution and shutter of polysulfides lead to low active material utilization and fast capacity fading. Electrospinning technology is employed to directly coat an interlayer composed of polyacrylonitrile (PAN) and nitrogen-doped carbon black (NC) fibers on the cathode. Benefited from electrospinning technology, the PAN-NC fibers possess good electrolyte infiltration for fast lithium-ion transport and great flexibility for adhering on the cathode...
August 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28812773/side-by-side-observation-of-the-interfacial-improvement-of-vertical-graphene-coated-silicon-nanocone-anodes-for-lithium-ion-batteries-by-patterning-technology
#5
Chao Wang, Fei Luo, Hao Lu, Bonan Liu, Geng Chu, Baogang Quan, Junjie Li, Changzhi Gu, Hong Li, Liquan Chen
We report that vertical graphene coating can greatly improve the electrochemical performance and the interfacial stability of silicon nanocone (SNC) anodes for lithium-ion batteries. The coating patterning technology is innovatively employed for side-by-side demonstration of the exclusive influences of graphene coating on the solid-electrolyte interphase (SEI) formation and the structural stability of the SNC electrode. The silicon nanocone-graphene (SNC-G) electrode achieves a longer cycle life (1715 cycles), higher Coulombic efficiency (average 98...
August 16, 2017: Nanoscale
https://www.readbyqxmd.com/read/28812244/fabrication-of-ordered-nanopattern-by-using-abc-triblock-copolymer-with-salt-in-toluene
#6
Hailiang Huang, Benbin Zhong, Xihong Zu, Hongsheng Luo, Wenjing Lin, Minghai Zhang, Yazhou Zhong, Guobin Yi
Ordered nanopatterns of triblock copolymer polystyrene-block-poly(2-vinylpyridine)-block- poly (ethylene oxide)(PS-b-P2VP-b-PEO) have been achieved by the addition of lithium chloride (LiCl). The morphological and structural evolution of PS-b-P2VP-b-PEO/LiCl thin films were systematically investigated by varying different experimental parameters, including the treatment for polymer solution after the addition of LiCl, the time scale of ultrasonic treatment and the molar ratio of Li(+) ions to the total number of oxygen atoms (O) in PEO block and the nitrogen atoms (N) in P2VP block...
August 15, 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28811917/drug-information-update-lithium-and-chronic-kidney-disease-debates-and-dilemmas
#7
Sumeet Gupta, Udayan Khastgir
Lithium is an established treatment for bipolar disorder and an augmenting agent for treatment-resistant depression. Despite awareness of renal adverse effects, including chronic kidney disease, for the past five decades, there has been a lack of research evidence. This has led to debates around the existence and magnitude of the risk. This article discusses the current evidence base regarding the link between lithium and chronic kidney disease, monitoring of renal functions and its clinical implications.
August 2017: BJPsych Bulletin
https://www.readbyqxmd.com/read/28811033/strong-magnetoelectrolysis-effect-during-electrochemical-reaction-monitored-in-situ-by-high-resolution-nmr-spectroscopy
#8
Bruna Ferreira Gomes, Pollyana Ferreira da Silva, Carlos Manuel Silva Lobo, Maiara da Silva Santos, Luiz Alberto Colnago
The strong effect of magnetic field on the electrochemical (EC) reduction of a diamagnetic species was monitored in situ in a 600 MHz (14 T) NMR spectrometer. Throughout EC-NMR experiments, the diamagnetic species is influenced by the Lorentz force (cross product of current density and magnetic field), which in turn acts on analyte transport and, as a result, enhances reaction rates. This phenomenon, known as magnetoelectrolysis, has not been considered in several in situ EC-NMR studies in solution, electron paramagnetic resonance (EC-EPR) spectroscopy, and magnetic resonance imaging (EC-MRI) involving the oxidation and reduction of organic compounds and lithium ion batteries...
August 29, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28810782/first-principles-molecular-dynamics-study-of-deuterium-diffusion-in-liquid-tin
#9
Xiaohui Liu, Daye Zheng, Xinguo Ren, Lixin He, Mohan Chen
Understanding the retention of hydrogen isotopes in liquid metals, such as lithium and tin, is of great importance in designing a liquid plasma-facing component in fusion reactors. However, experimental diffusivity data of hydrogen isotopes in liquid metals are still limited or controversial. We employ first-principles molecular dynamics simulations to predict diffusion coefficients of deuterium in liquid tin at temperatures ranging from 573 to 1673 K. Our simulations indicate faster diffusion of deuterium in liquid tin than the self-diffusivity of tin...
August 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28810289/targeted-gene-replacement-at-the-ura3-locus-of-the-basidiomycetous-yeast-pseudozyma-antarctica-and-its-transformation-using-lithium-acetate-treatment
#10
Tohru Yarimizu, Hitoshi Shimoi, Yuka Sameshima-Yamashita, Tomotake Morita, Hideaki Koike, Takashi Watanabe, Hiroko Kitamoto
The basidiomycetous yeast Pseudozyma antarctica is a remarkable producer of industrially-valuable enzymes and extracellular glycolipids. In this study, we developed a method for targeted gene replacement in P. antarctica. In addition, transformation conditions were optimized using lithium acetate, single-stranded carrier DNA, and polyethylene glycol (lithium acetate treatment) generally used for ascomycetous yeast transformation. In the rice-derived P. antarctica strain GB-4(0), PaURA3, a homolog of the Saccharomyces cerevisiae orotidine-5'-phosphate decarboxylase gene (URA3), was selected as the target locus...
August 15, 2017: Yeast
https://www.readbyqxmd.com/read/28809972/ab-initio-study-of-li-mg-and-al-insertion-into-rutile-vo2-fast-diffusion-and-enhanced-voltages-for-multivalent-batteries
#11
Vadym V Kulish, Daniel Koch, Sergei Manzhos
Vanadium oxides are among the most promising materials that can be used as electrodes in rechargeable metal-ion batteries. In this work, we systematically investigate thermodynamic, electronic, and kinetic properties associated with the insertion of Li, Mg and Al atoms into rutile VO2. Using first-principles calculations, we systematically study the structural evolution and voltage curves of LixVO2, MgxVO2 and AlxVO2 (0 < x < 1) compounds. The calculated lithium intercalation voltage starts at 3.50 V for single-atom insertion and decreases to 2...
August 15, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28809901/pump-linewidth-tolerant-wavelength-multicasting-using-soliton-kerr-frequency-combs
#12
Peicheng Liao, Changjing Bao, Arne Kordts, Maxim Karpov, Martin H P Pfeiffer, Lin Zhang, Yinwen Cao, Ahmed Almaiman, Amirhossein Mohajerin-Ariaei, Moshe Tur, Martin M Fejer, Tobias J Kippenberg, Alan E Willner
We experimentally demonstrate pump-linewidth-tolerant wavelength multicasting using microresonator-based soliton Kerr frequency combs. When Kerr comb lines serve as coherent pumps in a periodically poled lithium niobate waveguide, the linewidth of the multicast signal almost remains that of the original signal at different linewidths of Kerr combs, ranging from 100 kHz to 1 MHz. However, in conventional multicasting where free-running (FR) pumps are used, the linewidth of the converted signal significantly increases...
August 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28809476/reactivity-and-diffusivity-of-li-polysulfides-a-fundamental-study-using-impedance-spectroscopy
#13
Sara Drvarič Talian, Joze Moskon, Robert Dominko, Miran Gaberscek
Polysulfides are central compounds in lithium-sulfur battery cells. However, the fundamental redox and diffusion properties of polysulfides are still poorly understood. We try to fill this gap by performing accurate impedance spectroscopy investigation using symmetrical cells consisting from two planar glassy carbon electrodes separated with catholyte-soaked separator. The catholyte contains a mixture of selected polysulfides with predetermined nominal concentrations. Impedance measurements reveal textbook shapes of spectra for most polysulfide compounds or their mixtures...
August 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28809469/electrostatic-polysulfides-confinement-to-inhibit-redox-shuttle-process-in-the-lithium-sulfur-batteries
#14
Min Ling, Wenjun Yan, Ayako Kawase, Hui Zhao, Yanbao Fu, Vincent S Battaglia, Gao Liu
Cationic polymer can capture polysulfide ions and inhibit polysulfide shuttle effect in lithium sulfur (Li-S) rechargeable batteries, enhancing the Li-S battery cycling performance. The cationic poly[bis(2-chloroethyl) ether-alt-1,3-bis[3-(dimethylamino) propyl]urea] quaternized (PQ) with a high density quaternary ammonium cations can trap the lithium polysulfide through the electrostatic attraction between positively charged quaternary ammonium (R4N+) and negatively charged polysulfide (Sx2-). PQ binder based sulfur electrodes deliver much higher capacity and provide better stability than traditional polyvinylidene fluoride (PVDF) binder based electrodes in Li-S cells...
August 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28809417/co9s8-nanoparticles-anchored-on-nitrogen-and-sulfur-dual-doped-carbon-nanosheets-as-highly-efficient-bifunctional-electrocatalyst-for-oxygen-evolution-and-reduction-reactions
#15
Can Wu, Yuhang Zhang, Duo Dong, Haiming Xie, Jinghong Li
To promote the practical application of electrochemical energy storage and conversion systems, nonprecious electrocatalysts of low cost and with highly efficient performance in oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are highly desired. In this work, a cubic sodium chloride (NaCl) crystal-templated strategy is proposed for coupling Co9S8 nanoparticles to nitrogen- and sulfur-doped carbon nanosheets (Co9S8/N,S-CNS) by facile pyrolysis. The nitrogen and sulfur dual-doped carbon nanosheets can effectively prevent the aggregation of Co9S8 nanoparticles and greatly improve the conductivity of the hybrid structure...
August 15, 2017: Nanoscale
https://www.readbyqxmd.com/read/28809398/precision-medicine-for-suicidality-from-universality-to-subtypes-and-personalization
#16
A B Niculescu, H Le-Niculescu, D F Levey, P L Phalen, H L Dainton, K Roseberry, E M Niculescu, J O Niezer, A Williams, D L Graham, T J Jones, V Venugopal, A Ballew, M Yard, T Gelbart, S M Kurian, A Shekhar, N J Schork, G E Sandusky, D R Salomon
Suicide remains a clear, present and increasing public health problem, despite being a potentially preventable tragedy. Its incidence is particularly high in people with overt or un(der)diagnosed psychiatric disorders. Objective and precise identification of individuals at risk, ways of monitoring response to treatments and novel preventive therapeutics need to be discovered, employed and widely deployed. We sought to investigate whether blood gene expression biomarkers for suicide (that is, a 'liquid biopsy' approach) can be identified that are more universal in nature, working across psychiatric diagnoses and genders, using larger cohorts than in previous studies...
August 15, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28808715/constructing-heterostructured-li-fe-ni-mn-o-cathodes-for-lithium-ion-batteries-effective-improvement-of-ultrafast-lithium-storage
#17
Taolin Zhao, Na Zhou, Xiaoxiao Zhang, Qing Xue, Yuhua Wang, Minli Yang, Li Li, Renjie Chen
Surface modification is proved to be an effective strategy to improve the power density of lithium-ion batteries (LIBs) applied in electric vehicles. In this article, a protective modification layer (FeF3/LiF) is successfully deposited onto the surface of a low-cost cathode material, Li6/5[Fe1/10Ni3/20Mn11/20]O2, for realizing the improvement of ultrafast lithium storage. The reversible specific capacity and ultrahigh rate capability are effectively improved. The modified sample can achieve a higher reversible discharge specific capacity of 171...
August 15, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28808477/effect-of-lamotrigine-in-the-treatment-of-bipolar-depression-with-psychotic-features-a-case-report
#18
Tomoko Kajiya, Hiroko Sugawara, Yusuke Kajio, Satoru Morieda, Hibiki Tanaka, Tadashi Jono, Noboru Fujise, Mamoru Hashimoto
BACKGROUND: Major depressive episodes with psychotic features are more common in bipolar disorder than in major depressive disorder; however, there is little information on the optimal treatment for bipolar depression with psychotic features. CASE PRESENTATION: The patient was a 69-year-old man. At the age of 66, he was admitted to the hospital for the treatment of bipolar depression with psychotic features. He was treated with a combination therapy of antipsychotics and antidepressants during long-term hospitalization...
2017: Annals of General Psychiatry
https://www.readbyqxmd.com/read/28808274/temperature-dependent-birefringence-of-lithium-triborate-lbo-in-the-thz-regime
#19
Kechao Song, Zhen Tian, Weili Zhang, Mingwei Wang
Optical properties of lithium triborate (LBO) in the terahertz regime (0.2-2 THz) were characterized using broadband terahertz time-domain spectroscopy. The frequency dependence of refractive index and absorption coefficient of the LBO crystal was experimentally investigated over the temperature range of 77-297 K, which the experimental results indicated that LBO has very low optical absorption coefficient at terahertz frequencies especially for the beam polarization along the crystal's principal dielectric axis X...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807538/lactose-malabsorption-and-taste-aversion-learning
#20
Joe Arthurs, Jian-You Lin, Roberto Ocampo, Steve Reilly
Consumption of foods can be suppressed by two feeding system defense mechanisms: conditioned taste aversion (CTA) or taste avoidance learning (TAL). There is a debate in the literature about which form of intake suppression is caused by various aversive stimuli. For instance, illness-inducing stimuli like lithium chloride are the gold standard for producing CTA and external (or peripheral) painful stimuli, such as footshock, are the traditional model of TAL. The distinction between CTA and TAL, which have identical effects on intake, is based on differential effects on palatability...
August 11, 2017: Physiology & Behavior
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