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https://www.readbyqxmd.com/read/29161051/a-new-avenue-for-limiting-degradation-in-nanoli4ti5o12-for-ultra-fast-charge-lithium-ion-batteries-hybrid-polymer-inorganic-particles
#1
Jean-Christophe Daigle, Yuichiro Asakawa, Mélanie Beaupré, René Vieillette, Dharminder Laul, Michel L Trudeau, Karim Zaghib
Lithium titanium oxide (Li4Ti5O12)-based cells are a very promising battery technology for ultra-fast charge-discharge and long-life cycle batteries. However, surface reactivity of lithium titanium oxide is still a problem in presence of organic electrolyte which may cause expansion of the pouch cell. In this study, we report on the development of a simple and economical ''grafting onto'' method for forming hybrid polymer-Li4Ti15O12 nanoparticles which can be successfully applied in lithium-ion batteries. This method utilizes a low-cost and scalable hydrophobic polymer which is required for industrial implantation...
November 21, 2017: Nano Letters
https://www.readbyqxmd.com/read/29160854/biomass-derived-oxygen-and-nitrogen-co-doped-porous-carbon-with-hierarchical-architecture-as-sulfur-hosts-for-high-performance-lithium-sulfur-batteries
#2
Yan Zhao, Li Wang, Lanyan Huang, Maxim Yu Maximov, Mingliang Jin, Yongguang Zhang, Xin Wang, Guofu Zhou
In this work, a facile strategy to synthesize oxygen and nitrogen co-doped porous carbon (ONPC) is reported by one-step pyrolysis of waste coffee grounds. As-prepared ONPC possesses highly rich micro/mesopores as well as abundant oxygen and nitrogen co-doping, which is applied to sulfur hosts as lithium/sulfur batteries' appropriate cathodes. In battery testing, the sulfur/oxygen and nitrogen co-doped porous carbon (S/ONPC) composite materials reveal a high initial capacity of 1150 mAh·g(-1) as well as a reversible capacity of 613 mAh·g(-1) after the 100th cycle at 0...
November 21, 2017: Nanomaterials
https://www.readbyqxmd.com/read/29159352/improved-li-storage-performance-with-pedot-decorated-mno2-nanoboxes
#3
Xiaoqiao Chen, Zhiguang Cao, Lidan Xing, Youhao Liao, Yongcai Qiu, Weishan Li
In this paper, MnO2 nanoboxes coated with poly(3,4-ethylenedioxythiophene) film (denoted as MnO2@PEDOT) are investigated as an anode material in lithium-ion batteries. The MnO2 nanoboxes are developed through the surface chemical oxidation decomposition of MnCO3 cubes and the subsequent removal of their remaining cores. PEDOT is coated on the surface of MnO2 nanoboxes via in situ polymerization of 3,4-ethylenedioxythiophene. The charge-discharge tests demonstrate that this special configuration endows the resulting MnO2@PEDOT with remarkable electrochemical performances, that is a reversible capacity of 628 mA h g(-1) after 850 cycles at a current density of 1000 mA g(-1) and a rate capacity of 367 mA h g(-1) at 3000 mA g(-1)...
November 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/29159343/an-insight-into-intrinsic-interfacial-properties-between-li-metals-and-li10gep2s12-solid-electrolytes
#4
Bingbing Chen, Jiangwei Ju, Jun Ma, Jianjun Zhang, Ruijuan Xiao, Guanglei Cui, Liquan Chen
Density functional theory simulations and experimental studies were performed to investigate the interfacial properties, including lithium ion migration kinetics, between lithium metal anode and solid electrolyte Li10GeP2S12(LGPS). The LGPS[001] plane was chosen as the studied surface because the easiest Li(+) migration pathway is along this direction. The electronic structure of the surface states indicated that the electrochemical stability was reduced at both the PS4- and GeS4-teminated surfaces. For the interface cases, the equilibrium interfacial structures of lithium metal against the PS4-terminated LGPS[001] surface (Li/PS4-LGPS) and the GeS4-terminated LGPS[001] surface (Li/GeS4-LGPS) were revealed based on the structural relaxation and adhesion energy analysis...
November 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29156883/low-molecular-weight-supramolecular-ionogel-based-on-host-guest-interaction
#5
Aoli Wu, Fei Lu, Panpan Sun, Xuanxuan Qiao, Xinpei Gao, Li-Qiang Zheng
Supramolecular ionogels were prepared by self-assemble of small molecules through host-guest interaction between β-cyclodextrin (β-CD) and a room-temperature ionic liquid (IL) 3-(1-methyl-3-imidazolio)propanesulfonate - lithium bis(trifluoromethanesulfonyl)imide (MIPS-LiTFSI) which contains zwitterion MIPS. 19F NMR and 2D ROESY 1H NMR have been used to prove that only TFSI- is involved in the complexation. 1H NMR, FT-IR and comparative tests indicated that the electrostatic interaction between imidazole cation and TFSI- anion and intermolecular hydrogen bonding between three compounds also contribute to the formation of supramolecular ionogel...
November 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29156592/activation-of-trek-1-but-not-trek-2-channel-by-mood-stabilizers
#6
Eun-Jin Kim, Dong Kun Lee, Seong-Geun Hong, Jaehee Han, Dawon Kang
Earlier studies have demonstrated that the tandem pore domain weak inward rectifying K⁺ channel (TWIK)-related K⁺ (TREK)-1 channel is inhibited by antidepressants and is associated with major depression. However, little is known about the effect of mood stabilizers that are commonly used for treatment of bipolar disorder on TREK channels, members of the two-pore domain K⁺ (K2P) channel family. This study sought to investigate the effect of mood stabilizers on TREK-1 and TREK-2 channels. HEK-293A cells were transfected with human TREK-1 or TREK-2 DNA...
November 19, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29156296/associations-between-severity-of-anxiety-and-clinical-and-biological-features-of-major-affective-disorders
#7
Fernanda Liboni Cavicchioli, Michael Maes, Chutima Roomruangwong, Kamila Landucci Bonifacio, Decio Sabbatini Barbosa, George Anderson, Heber Odebrecht Vargas, Sandra Odebrecht Vargas Nunes
Patients with major affective disorders (MAFD) with comorbid anxiety show a greater functional impairment than those without anxiety. The aim of this study is to delineate the associations between severity of anxiety in MAFD, namely bipolar disorder (BD) and major depression (MDD), and MAFD characteristics and serum high-density lipoprotein (HDL)-cholesterol levels. Recruited were 82 participants with anxiety disoders and 83 without anxiety disoders, including 101 MAFD patients and 51 healthy controls. We used the Hamilton Anxiety Rating Scale (HAM-A) to measure severity of anxiety and made the diagnoses of posttraumatic stress disorder (PTSD), obsessive compulsive disorder (OCD), panic disorder (PD), generalized anxiety disorder (GAD) and phobias...
November 8, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/29156139/thermo-sensitive-phase-separation-behavior-of-poly-benzyl-methacrylate-solvate-ionic-liquid-solutions
#8
Yumi Kobayashi, Yuzo Kitazawa, Kei Hashimoto, Takeshi Ueki, Hisashi Kokubo, Masayoshi Watanabe
We report a lower critical solution temperature (LCST) behavior of binary systems consisting of poly(benzyl methacrylate) (PBnMA) and solvate ionic liquids (SILs): equimolar mixtures of triglyme (G3) or tetraglyme (G4) and lithium bis(trifluoromethanesulfonyl)amide (Li[TFSA]). We evaluated the critical temperatures (Tcs) using transmittance measurements. The stability of the glyme-Li+ complex ([Li(G3 or G4)]+) in the presence of PBnMA was confirmed using Raman spectroscopy, pulsed-field gradient spin-echo NMR (PGSE-NMR), and thermogravimetric analysis to demonstrate that the complex was not disrupted...
November 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29155912/a-novel-sulfonamide-non-classical-carbenoid-a-mechanistic-study-for-the-synthesis-of-enediynes
#9
Theodore O P Hayes, Ben Slater, Richard A J Horan, Marc Radigois, Jonathan D Wilden
Alkynyl sulfonamides undergo sequential 1,4- then 1,2-addition/rearrangement with lithium acetylides to yield enediynes in the absence of any promoters or catalysts. Mechanistic investigations suggest that the reaction proceeds via 1,4-conjugate addition of the nucleophile to the unsaturated system to give a key alkenyl lithium species which is stabilised by an intramolecular coordination effect by a sulfonamide oxygen atom. This species can be considered a vinylidene carbenoid given the carbon atom bears both an anion (as a vinyllithium) and a leaving group (the sulfonamide)...
November 20, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29155556/anthracite-derived-dual-phase-carbon-coated-li3v2-po4-3-as-high-performance-cathode-material-for-lithium-ion-batteries
#10
Xiao-Kai Ding, Lu-Lu Zhang, Xue-Lin Yang, Hui Fang, Ying-Xian Zhou, Ji-Qing Wang, Di Ma
In this study, low cost anthracite derived dual-phase carbon coated Li3V2(PO4)3 composites have been successfully prepared via a traditional solid-phase method. XRD results show that the as-prepared samples have high crystallinity and anthracite-introducing has no influence on the LVP crystal structure. The LVP/C particles are uniformly covered with a dual-phase carbon layer composed of amorphous carbon and graphitic carbon. The effect of the amount of anthracite on the battery performance of LVP as a cathode material has also been studied...
November 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29154099/comparison-analysis-on-the-thermal-runaway-of-lithium-ion-battery-under-two-heating-modes
#11
Tangqin Wu, Haodong Chen, Qingsong Wang, Jinhua Sun
The thermal stability evaluation of materials in a soft-pack commercial cell is tested using C80 calorimeter, including anode, cathode, separator and full cell (mixing of the three materials including additional electrolyte). Thermal runaway characteristic of the commercial cell is tested on the accelerating rate calorimeter (ARC) with two heating modes, including internal heating mode and external heating mode. The results show that the thermal stability of internal material for tested cell follows the below order: anode<separator<cathode...
November 13, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29154082/are-preoperative-sestamibi-scans-useful-for-identifying-ectopic-parathyroid-glands-in-patients-with-expected-multigland-parathyroid-disease
#12
Farah Karipineni, Zeyad Sahli, Helina Somervell, Aarti Mathur, Jason D Prescott, Ralph P Tufano, Martha A Zeiger
BACKGROUND: The role of preoperative localization studies in patients with hyperparathyroidism and expected multigland disease remains poorly defined. Our study investigates the usefulness of obtaining preoperative sestamibi scans and ultrasonography of the neck in identifying ectopic glands in this group of patients. METHODS: Under Institutional Review Board approval, we performed a retrospective review of patients who underwent operation for secondary hyperparathyroidism, tertiary hyperparathyroidism, lithium-induced hyperparathyroidism, and multiple endocrine neoplasia syndrome at a tertiary institution between 2004 and 2015...
November 16, 2017: Surgery
https://www.readbyqxmd.com/read/29153717/biomass-derived-porous-carbon-modified-glass-fiber-separator-as-polysulfide-reservoir-for-li-s-batteries
#13
Ramakrishnan Kalai Selvan, Pei Zhu, Chaoi Yan, Jiadeng Zhu, Mahmut Dirican, A Shanmugavani, Yun Sung Lee, Xiangwu Zhang
Biomass-derived porous carbon has been considered as a promising sulfur host material for lithium-sulfur batteries because of its high conductive nature and large porosity. The present study explored biomass-derived porous carbon as polysulfide reservoir to modify the surface of glass fiber (GF) separator. Two different carbons were prepared from Oak Tree fruit shells by carbonization with and without KOH activation. The KOH activated porous carbon (AC) provides a much higher surface area (796 m(2) g(-1)) than pyrolized carbon (PC) (334 m(2) g(-1))...
November 7, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29151459/the-ball-on-disk-cyclic-wear-of-cad-cam-machinable-dental-composite-and-ceramic-materials
#14
Kazuyuki Handa, Natsuko Murakami, Toshiki Yamazaki, Hidekazu Takahashi, Noriyuki Wakabayashi
The purpose of this study was to investigate the wear volume and the principal strain of machinable dental composite and ceramics in simulated mastication. A ball-on-disk wear test was performed for 3,000 cycles in water, using nine ball/disk combinations of three commercial CAD/CAM materials: feldspathic, lithium disilicate glass ceramics, and a highly loaded composite material (n = 7 for each combination). The wear volume was optically measured using a digital scanner and analyzed for statistical differences based on the materials (α = 0...
November 17, 2017: Journal of Oral Science
https://www.readbyqxmd.com/read/29150869/maternal-mood-disorders-and-lithium-exposure-in-utero-were-not-associated-with-poor-cognitive-development-during-childhood
#15
L Forsberg, M Adler, I Römer Ek, M Ljungdahl, L Navér, L L Gustafsson, G Berglund, A Chotigasatien, U Hammar, B Böhm, K Wide
AIM: This study evaluated whether maternal mood disorders, particularly bipolar disorder, and lithium treatment during pregnancy influenced the neonatal health and cognition of children born from 2006- 2010. METHODS: Our study at Karolinska University Hospital, Stockholm, Sweden, focused on women with and without mood disorders and their children. Information on pharmacotherapy, mental health, delivery and neonatal complications was retrospectively collected from electronic patient records...
November 18, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/29150135/effect-of-different-resin-luting-cements-on-the-marginal-fit-of-lithium-disilicate-pressed-crowns
#16
Radek Mounajjed, Thomas J Salinas, Tomas Ingr, Basel Azar
STATEMENT OF PROBLEM: The vertical marginal discrepancy of restorations can increase upon cementation, and poor marginal fit can lead to cement dissolution, marginal discoloration, microleakage, and secondary caries. The amount of increase is related to the type of luting cement used, but how lithium disilicate pressed crowns are affected by different resin cements is unclear. PURPOSE: The purpose of this in vitro study was to compare the effect of using different resin luting cements on the vertical marginal discrepancy of lithium disilicate pressed crowns...
November 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29149756/residual-anxiety-may-be-associated-with-depressive-relapse-during-continuation-therapy-of-bipolar-ii-depression
#17
Lorenzo Lorenzo-Luaces, Jay D Amsterdam, Robert J DeRubeis
BACKGROUND: Anxiety symptoms are common in bipolar disorder. We explored the effect of anxiety on the outcome of acute and continuation pharmacotherapy of bipolar II depression. METHODS: Data were derived from a randomized double-blind 12-week acute (N = 129) and 6-month continuation (N = 55) comparison of venlafaxine versus lithium monotherapy in bipolar II depression in adults. We distinguished between the items of the Hamilton Rating Scale for Depression (HRSD) that capture depression vs...
November 8, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29149567/preparation-of-lithium-titanate-reduced-graphene-oxide-composites-with-3d-fishnet-like-conductive-structure-via-a-gas-foaming-method-for-high-rate-lithium-ion-batteries
#18
Tao Meng, Fenyun Yi, Honghong Cheng, Junnan Hao, Dong Shu, Shixu Zhao, Chun He, Xiaona Song, Fan Zhang
Using ammonium chloride (NH4Cl) as the pore-forming agent, three-dimensional (3D) "fishnet-like" lithium titanate/reduced graphene oxide (LTO/G) composites with hierarchical porous structure are prepared via a gas-foaming method. SEM and TEM images show that in the composite prepared with the NH4Cl concentration of 1 mg mL-1 (1-LTO/G), LTO particles with sizes of 50~100 nm disperse homogeneously on the 3D "fishnet-like" graphene sheets. The nitrogen-sorption analyses reveal the existence of micro/mesopores, which is attributed to the introduction of NH4Cl into the gap between the graphene sheets that further decomposes into gases and produces hierarchical pores during the thermal treatment process...
November 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29149176/a-simple-way-for-targeted-delivery-of-an-antibiotic-in-vitro-evaluation-of-a-nanoclay-based-composite
#19
Leslie Valdés, Irela Pérez, Louis Charles de Ménorval, Ernesto Altshuler, Jon Otto Fossum, Aramis Rivera
The sodium-modified form of fluorohectorite nanoclay (NaFh) is introduced as a potential drug carrier, demonstrating its ability for the controlled release of the broad-spectrum antibiotic Ciprofloxacin through in vitro tests. The new clay-drug composite is designed to target the local infections in the large intestine, where it delivers most of the incorporated drug thanks to its pH-sensitive behavior. The composite has been conceived to avoid the use of coating technology and to decrease the side-effects commonly associated to the burst-release of the ciprofloxacin at the stomach level...
2017: PloS One
https://www.readbyqxmd.com/read/29149066/nanostructured-mno%C3%A2-as-electrode-materials-for-energy-storage
#20
REVIEW
Christian M Julien, Alain Mauger
Manganese dioxides, inorganic materials which have been used in industry for more than a century, now find great renewal of interest for storage and conversion of energy applications. In this review article, we report the properties of MnO₂ nanomaterials with different morphologies. Techniques used for the synthesis, structural, physical properties, and electrochemical performances of periodic and aperiodic frameworks are discussed. The effect of the morphology of nanosized MnO₂ particles on their fundamental features is evidenced...
November 17, 2017: Nanomaterials
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