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https://www.readbyqxmd.com/read/28724265/facile-synthesis-of-sio2-c-nanoparticles-anchored-on-mwnt-as-high-performance-anode-materials-for-li-ion-batteries
#1
Yan Zhao, Zhengjun Liu, Yongguang Zhang, Almagul Mentbayeva, Xin Wang, M Yu Maximov, Baoxi Liu, Zhumabay Bakenov, Fuxing Yin
Carbon-coated silica nanoparticles anchored on multi-walled carbon nanotubes (SiO2@C/MWNT composite) were synthesized via a simple and facile sol-gel method followed by heat treatment. Scanning and transmission electron microscopy (SEM and TEM) studies confirmed densely anchoring the carbon-coated SiO2 nanoparticles onto a flexible MWNT conductive network, which facilitated fast electron and lithium-ion transport and improved structural stability of the composite. As prepared, ternary composite anode showed superior cyclability and rate capability compared to a carbon-coated silica counterpart without MWNT (SiO2@C)...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28722816/construction-of-all-solid-state-batteries-based-on-sulfur-graphene-composite-and-li9-54si1-74p1-44s11-7cl0-3-solid-electrolyte
#2
Ruochen Xu, Zhang Wu, Shenzhao Zhang, Xiuli Wang, Yan Xia, Xinhui Xia, Xiaohua Huang, Jiangping Tu
Herein we report an effective way for construction of all-solid-state lithium-sulfur batteries (LSBs) with sulfur/reduced graphene oxide (rGO) and Li9.54Si1.74P1.44S11.7Cl0.3 solid electrolyte. In the composite cathode, the Li9.54Si1.74P1.44S11.7Cl0.3 powder is homogeneously mixed with the S/rGO composite to enhance the ionic conductivity. Coupled with metallic Li anode and solid electrolyte, the designed S/rGO-Li9.54Si1.74P1.44S11.7Cl0.3 composite cathode exhibits a high specific capacity and good cyclic stability...
July 19, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28722735/lithiation-of-multilayer-ni-nio-electrodes-criticality-of-nickel-layer-thicknesses-on-conversion-reaction-kinetics
#3
Guennadi Evmenenko, Timothy T Fister, D Bruce Buchholz, Fernando C Castro, Qianqian Li, Jinsong Wu, Vinayak P Dravid, Paul Fenter, Michael J Bedzyk
X-ray reflectivity and transmission electron microscopy (TEM) were used to characterize the morphological changes in thin film electrodes with alternating Ni and NiO layers during lithiation as a function of the Ni buffer layer thickness. Complete lithiation of the active NiO layers occurs only when the thickness of the Ni/NiO bilayers are less than 75 Å - a threshold value that is determined by the sum of the Ni quantity in the Ni/NiO bilayer of the multilayer stack. Thicker Ni/NiO bilayers present a kinetic barrier for lithium ion diffusion inside the stack resulting in partial lithiation of the multilayer electrodes in which only the top NiO layer lithiates...
July 19, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28722396/a-novel-ceramic-grafted-separator-with-highly-thermal-stability-for-safe-lithium-ion-batteries
#4
Xiaoyu Jiang, Xiaoming Zhu, Xinping Ai, Hanxi Yang, Yuliang Cao
Separator is a critical component of lithium-ion batteries (LIBs), which not only allows ionic transport while prevents electrical contact between electrodes, but also plays a key role for thermal safety performance of LIBs. However, commercial separators for LIBs are typically microporous polyolefin membranes that pose challenges for battery safety, due to shrinking and melting at elevated temperature. Here, we demonstrate a strategy to improve the thermal stability and electrolyte affinity of polyethylene (PE) separators...
July 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28722318/porous-carbon-nanofibers-encapsulated-with-peapod-like-hematite-nanoparticles-for-high-rate-and-long-life-battery-anodes
#5
Guanglin Xia, Qili Gao, Dalin Sun, Xuebin Yu
Fe2 O3 is regarded as a promising anode material for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) due to its high specific capacity. The large volume change during discharge and charge processes, however, induces significant cracking of the Fe2 O3 anodes, leading to rapid fading of the capacity. Herein, a novel peapod-like nanostructured material, consisting of Fe2 O3 nanoparticles homogeneously encapsulated in the hollow interior of N-doped porous carbon nanofibers, as a high-performance anode material is reported...
July 19, 2017: Small
https://www.readbyqxmd.com/read/28722277/in-situ-growth-and-wrapping-of-aminoanthraquinone-nanowires-within-3d-graphene-framework-as-high-performance-foldable-organic-cathode-for-lithium-ion-batteries
#6
Guanhui Yang, Fanxing Bu, Yanshan Huang, Yu Zhang, Imran Shakir, Yuxi Xu
Small conjugated carbonyl compounds are intriguing candidates of organic electrode materials because of their abundance, high theoretical capacity and adjustable molecular structure. However, their dissolution in aprotic electrolytes and poor conductivity eclipse them in terms of practical capacity, cycle life and rate capability. Herein, we report a foldable and binder-free nanocomposite electrode consisting of 2-aminoanthraquinone (AAQ) nanowires wrapping within three-dimensional (3D) graphene framework, which is prepared through antisolvent crystallization followed by a facile chemical reduction and self-assembly process...
July 19, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28722257/mesoporous-tin-based-oxide-nanospheres-and-graphene-composites-as-advanced-anodes-for-lithium-ion-half-full-and-sodium-ion-batteries
#7
Yanyan He, Aihua Li, Caifu Dong, Chuanchuan Li, Liqiang Xu
The large volume variations of tin-based oxides hinder their extensive applications in the field of lithium ion batteries (LIBs). In this study, structure design, hybrid fabrication and carbon coating approaches have been simultaneously adopted to relieve these weaknesses. Therefore, uniform mesoporous NiO/SnO2@rGO, Ni-Sn oxide@rGO and SnO2@rGO nanosphere composites have been selectively fabricated. Among them, the obtained NiO/SnO2@rGO composite exhibits high capacity 800 mAh g-1 at 1000 mA g-1 after 400 cycles...
July 19, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28722045/3d-free-standing-hierarchical-cuco2o4-nanowire-cathodes-for-rechargeable-lithium-oxygen-batteries
#8
Wang Sun, Yan Wang, Haitao Wu, Zhenhua Wang, David Rooney, Kening Sun
A carbon and binder-free cathode for use in Li-O2 cells which is based on free-standing CuCo2O4 nanowires supported on a nickel foam was synthesized by an efficient hydrothermal method. The resulting hierarchical porous and umbrella structures of the hybrid CuCo2O4@Ni foam cathodes present an excellent rate capability and cycle performance.
July 19, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28721729/impact-of-cl-doping-on-electrochemical-performance-in-orthosilicate-li2fesio4-a-dft-supported-experimental-approach
#9
Shivani Singh, Anish K Raj, Raja Sen, Priya Johari, Sagar Mitra
Safe and high capacity cathode materials are a long quest for commercial lithium-ion battery development. Among various searched cathode materials, Li2FeSiO4 has taken the attention due to optimal working voltage, high elemental abundance, and low toxicity. However, as per our understanding and observation, the electrochemical performance of this material is significantly limited by the intrinsic low electronic conductivity and slow lithium-ion diffusion, which limits the practical capacity (theoretical ~ 330 mAh g-1)...
July 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28719138/chevrel-phase-mo6-t8-t-s-se-as-electrodes-for-advanced-energy-storage
#10
REVIEW
Lin Mei, Jiantie Xu, Zengxi Wei, Huakun Liu, Yutao Li, Jianmin Ma, Shixue Dou
With the large-scale applications of electric vehicles in recent years, future batteries are required to be higher in power and possess higher energy densities, be more environmental friendly, and have longer cycling life, lower cost, and greater safety than current batteries. Therefore, to develop alternative electrode materials for advanced batteries is an important research direction. Recently, the Chevrel phase Mo6 T8 (T = S, Se) has attracted increasing attention as electrode candidate for advanced batteries, including monovalent (e...
July 18, 2017: Small
https://www.readbyqxmd.com/read/28718628/synthesis-and-electrochemical-reaction-of-tin-oxalate-reduced-graphene-oxide-composite-anode-for-rechargeable-lithium-batteries
#11
Jae-Sang Park, Jae Hyeon Jo, Hitoshi Yashiro, Sung-Soo Kim, Sun-Jae Kim, Yang-Kook Sun, Seung-Taek Myung
Unlike SnO2, few studies have reported on the use of SnC2O4 as an anode material for rechargeable lithium batteries. Here, we first introduce a SnC2O4-reduced graphene oxide composite produced via hydrothermal reactions followed by a layer-by-layer self-assembly process. The addition of rGO increased the electric conductivity up to ~10-3 S cm-1. As a result, the SnC2O4-reduced graphene oxide electrode exhibited a high charge (oxidation) capacity of ~1166 mAh g-1 at a current of 100 mA g-1 (0.1 C-rate) with a good retention delivering approximately 620 mAh g-1 at the 200th cycle...
July 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28717792/accelerated-fatigue-resistance-%C3%A2-of-novel-design-histoanatomic-%C3%A2-implant-restorations-made-of-%C3%A2-cad-cam-bilaminar-assemblies
#12
Ivan Molina, Jack Goldberg, Claudia Maziero Volpato, Pascal Magne
OBJECTIVES: Evaluate the fatigue resistance and failure mode of novel-design implant restorations made of histoanatomic computer-assisted design/computer-assisted manufacturing (CAD/CAM) bilaminar bonded assemblies. MATERIAL AND METHODS: 60 screw-retained implant restorations were fabricated. Monolithic restorations were used as a control group (15 lithium disilicate: group CE; and 15 nanofilled composite resin: group CL), and compared with bilaminar restorations (15 dentin-shaped lithium disilicate mesostructures with a bonded nanofilled composite resin veneer: group CEL; and 15 dentin-shaped nanofilled composite resin mesostructures with a bonded lithium disilicate veneer: group CLE)...
2017: International Journal of Esthetic Dentistry
https://www.readbyqxmd.com/read/28715225/structure-ionic-conductivity-and-dielectric-properties-of-li-rich-garnet-type-li5-2xla3ta2-xsmxo12-0-%C3%A2-x-%C3%A2-0-55-and-their-chemical-stability
#13
Dalia M Abdel-Basset, Suresh Mulmi, Mohammed S El-Bana, Suzan S Fouad, Venkataraman Thangadurai
Lithium garnet oxides are considered as very promising solid electrolyte candidates for all-solid-state lithium ion batteries (SSLiBs). In this work, we present a cubic garnet-type Li5+2xLa3Ta2-xSmxO12 (0 ≤ x ≤ 0.55) system as a potential electrolyte for SSLiBs. Powder X-ray diffraction (PXRD) and scanning electron microscopy (SEM) were employed to investigate the structural stability of Li5+2xLa3Ta2-xSmxO12. The results from PXRD and SEM suggested structural and morphological transformation as a function of dopant concentration...
July 17, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28715188/understanding-microscopic-behavior-of-the-mixture-of-ionic-liquid-ethylene-glycol-lithium-salt-through-time-resolved-fluorescence-nuclear-magnetic-resonance-nmr-and-electron-paramagnetic-resonance-epr-studies
#14
Ranu Satish Dhale, Prabhat Kumar Sahu, Moloy Sarkar
The present study has been undertaken with an aim to find out the suitability of a binary solvent system, comprising an ionic liquid, 1-(2-Hydroxyethyl)-3-methylimidazolium bis (trifluoromethylsulfonyl)imide ([OHEMIM][NTf2]) and ethylene glycol (EG), towards lithium ion battery applications. For this purpose, the behavior in terms of structure, intermolecular interaction and dynamics of several solvent systems, [OHEMIM][NTf2], [OHEMIM][NTf2]-LiNTf2(lithium bis(trifluoromethylsulfonyl)imide), [OHEMIM][NTf2]-EG and [OHEMIM][NTf2]-EG-LiNTf2 are investigated by carrying out steady state and time-resolved fluorescence, nuclear magnetic resonance (NMR) and electron paramagnetic resonance (EPR) measurements...
July 17, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28715023/amorphous-boron-nanorod-as-an-anode-material-for-lithium-ion-batteries-at-room-temperature
#15
Changjian Deng, Miu Lun Lau, Heather M Barkholtz, Haiping Xu, Riley Parrish, Meiyue Olivia Xu, Tao Xu, Yuzi Liu, Hao Wang, Justin G Connell, Kassiopeia A Smith, Hui Xiong
We report an amorphous boron nanorod anode material for lithium-ion batteries prepared through smelting non-toxic boron oxide in liquid lithium. Boron in theory can provide capacity as high as 3099 mA h g(-1) by alloying with Li to form B4Li5. However, experimental studies of the boron anode have been rarely reported for room temperature lithium-ion batteries. Among the reported studies the electrochemical activity and cycling performance of the bulk crystalline boron anode material are poor at room temperature...
July 17, 2017: Nanoscale
https://www.readbyqxmd.com/read/28714694/rapid-thermal-annealing-of-cathode-garnet-interface-toward-high-temperature-solid-state-batteries
#16
Boyang Liu, Kun Fu, Yunhui Gong, Chunpeng Yang, Yonggang Yao, Yanbin Wang, Chengwei Wang, Yudi Kuang, Glenn Pastel, Hua Xie, Eric D Wachsman, Liangbing Hu
High temperature batteries require the battery components to be thermally stable and function properly at high temperatures. Conventional batteries have high temperature safety issues such as thermal runaway, which are mainly attributed to the properties of liquid organic electrolytes such as low boiling points and high flammability. In this work, we demonstrate a truly all-solid-state high temperature battery using a thermally stable garnet solid-state electrolyte, a lithium metal anode, and a V2O5 cathode, which can operate well at 100(o)C...
July 17, 2017: Nano Letters
https://www.readbyqxmd.com/read/28714604/antidepressants-antipsychotics-and-mood-stabilizers-in-pregnancy-what-do-we-know-and-how-should-we-treat-pregnant-women-with-depression
#17
REVIEW
Asher Ornoy, Liza Weinstein-Fudim, Zivanit Ergaz
Depression is generally treated with antidepressants, but may often need antipsychotics and mood stabilizers. We discuss the updated data regarding the safety in pregnancy of antidepressants and antipsychotics, except selective serotonin reuptake inhibitors, and their possible impact on the long-term development of the offspring. Several earlier studies demonstrated a slight increase in the rate of major anomalies following maternal tricyclic antidepressant treatment, but most current literature shows their relative safety in pregnancy...
July 17, 2017: Birth defects research
https://www.readbyqxmd.com/read/28714553/lithium-in-drinking-water-and-the-incidence-of-bipolar-disorder-a-nation-wide-population-based-study
#18
Lars V Kessing, Thomas A Gerds, Nikoline N Knudsen, Lisbeth F Jørgensen, Søren M Kristiansen, Denitza Voutchkova, Vibeke Ernstsen, Jörg Schullehner, Birgitte Hansen, Per K Andersen, Annette K Ersbøll
OBJECTIVE: Animal data suggest that subtherapeutic doses, including micro doses, of lithium may influence mood, and lithium levels in drinking water have been found to correlate with the rate of suicide. It has never been investigated whether consumption of lithium may prevent the development of bipolar disorder (primary prophylaxis). In a nation-wide population-based study, we investigated whether long-term exposure to micro levels of lithium in drinking water correlates with the incidence of bipolar disorder in the general population, hypothesizing an inverse association in which higher long-term lithium exposure is associated with lower incidences of bipolar disorder...
July 17, 2017: Bipolar Disorders
https://www.readbyqxmd.com/read/28714098/rational-design-of-three-layered-tio2-carbon-mos2-hierarchical-nanotubes-for-enhanced-lithium-storage
#19
Sibo Wang, Bu Yuan Guan, Le Yu, Xiong Wen David Lou
Here we demonstrate the rational design and synthesis of three-layered TiO2 @carbon@MoS2 hierarchical nanotubes for anode applications in lithium-ion batteries (LIBs). Through an efficient step-by-step strategy, ultrathin MoS2 nanosheets are grown on nitrogen-doped carbon (NC) coated TiO2 nanotubes to achieve the TiO2 @NC@MoS2 tubular nanostructures. This smart design can effectively shorten the diffusion length of Li(+) ions, increase electric conductivity of the electrode, relax volume variation of electrode materials upon cycling, and provide more active sites for electrochemical reactions...
July 17, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28712740/aspects-of-adhesion-tests-on-resin-glass-ceramic-bonding
#20
Andrew Chi Ho Wong, Tian Tian, James Kit Hon Tsoi, Michael Francis Burrow, Jukka Pekka Matinlinna
OBJECTIVES: This study aimed to compare and contrast two resin-ceramic bond strength tests, the tensile bond strength and the four-point bending tests. The effects of hydrofluoric acid (HF) etching time and storage condition on bond strength were also studied. METHODS: Ceramic beams (N=480) with the dimensions of 2.00×2.00×12.45mm(3) were sectioned from lithium disilicate ceramic ingots (IPS e.max CAD), then polished and fired for final crystallization. The joint surfaces were etched with HF gel (IPS Ceramic etching gel) for 20s, 40s, or 60s of each group (n=160)...
July 13, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
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