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Jinlong Cui, Yongfu Cui, Shaohui Li, Hongliang Sun, Zhongsheng Wen, Juncai Sun
Micro-sized porous SiOx@C composites used as anode for lithium-ion batteries (LIBs) are synthesized from rice husks (RHs) through low-temperature (700 °C) aluminothermic reduction. The resulting SiOx@C composite shows mesoporous irregular particle morphology with a high specific surface area of 597.06 m2/g under the optimized reduction time. This porous SiOx@C composite is constructed by SiOx nanoparticles uniformly dispersed in the C matrix. When tested as anode material for LIBs, it displays considerable specific capacity (1230 mAh/g at a current density of 0...
October 20, 2016: ACS Applied Materials & Interfaces
Xiaopeng Wang, Jian Gao, Zhihua Cheng, Nan Chen, Liangti Qu
A new type of responsive battery with the fascinating feature of pressure perceptibility has been developed, which can spontaneously, timely and reliably control the power outputs (e.g., current and voltage) in response to pressure changes. The device design is based on the structure of the Zn-air battery, in which graphene-coated sponge serves as pressure-sensitive air cathode that endows the whole system with the capability of self-controlled energy release. The responsive batteries exhibit superior battery performance with high open-circuit voltage (1...
October 20, 2016: Angewandte Chemie
Jennifer Mah, Heather Goad, Karsten Steinhauer
French speaking learners of English encounter persistent difficulty acquiring English [h], thus confusing words like eat and heat in both production and perception. We assess the hypothesis that the acoustic properties of [h] may render detection of this segment in the speech stream insufficiently reliable for second language acquisition. We use the mismatch negativity (MMN) in event-related potentials to investigate [h] perception in French speaking learners of English and native English controls, comparing both linguistic and non-linguistic conditions in an unattended oddball paradigm...
2016: Frontiers in Psychology
Jinyoung Chun, Changshin Jo, Sunhye Sahgong, Min Gyu Kim, Eunho Lim, Dong Hyeon Kim, Jongkook Hwang, Eunae Kang, Keun Ah Ryu, Yoon Seok Jung, Youngsik Kim, Jinwoo Lee
Metal fluorides (MFx) are one of the most attractive cathode candidates for Li-ion batteries (LIBs) due to their high conversion potentials with large capacities. However, only a limited number of synthetic method, generally involving highly toxic or inaccessible reagents, currently exist, which has made it difficult to produce well-designed nanostructures suitable for cathodes; consequently, harnessing their potential cathodic properties has been a challenge. Herein, we report a new bottom-up synthetic method utilizing ammonium fluoride (NH4F) for the preparation of anhydrous MFx(CuF2, FeF3, and CoF2)/mesoporous carbon(MSU-F-C) nanocomposites, whereby a series of metal precursor nanoparticles pre-confined in mesoporous carbon were readily converted to anhydrous MFx through simple heat treatment with NH4F under solventless conditions...
October 18, 2016: ACS Applied Materials & Interfaces
Sarath Channavajjhala, Wenjing Jia, Mahli Jalland, Kevin OʼShaughnessy, Ian Hall, Mark Glover
OBJECTIVE: Thiazide diuretics are amongst most widely prescribed and effective anti-hypertensive medicines worldwide. Thiazides however cause Thiazide-Induced Hyponatremia (TIH), a novel and potentially important paradigm of dysregulated distal nephron sodium and water reabsorption. A priori TIH must result from excessive saliuresis and/or water reabsorption. The water and electrolyte transporter composition of Urinary Exosomes (UE) reflects their cellular origin and are a promising way to study renal dysfunction...
September 2016: Journal of Hypertension
Lei Jia, Tianpin Wu, Jun Lu, Lu Ma, Wentao Zhu, Xinping Qiu
Copper powder was introduced into the lithium sulfur battery system to capture intermediate polysulfides and CuxS (x=1 or 2) species was generated depending on the chain length of polysulfides. This phenomenon was verified by X-ray absorption near edge structure technique. The results indicated that copper can be oxidized to CuS by Li2Sx (x≥6), and a mixture of Cu2S and CuS was obtained when x ranges from 3 to 6. While Cu2S is eventually formed in the presence of Li2S3. After several cycles activation, the polysulfide-shuttle effect and self-discharge phenomenon which hinder the application of lithium sulfur batteries are found nearly eliminated Further experiments demonstrated that in the case of Cu2S generation, a high specific sulfur capacity of 1300 mAh g-1 could be delivered, corresponding to 77...
October 18, 2016: ACS Applied Materials & Interfaces
Thrinathreddy Ramireddy, Neeraj Sharma, Tan Xing, Ying Chen, Jeremie Leforestier, Alexey M Glushenkov
Sodium-ion batteries are in the spotlight as viable alternatives to lithium-ion batteries in stationary storage and power grid applications. Among possible anode materials, Sb is one of the interesting candidates due to a combination of battery-type potential plateaus in the charge-discharge profiles, high capacity (theoretical capacity of 660 mAh g(-1)) and demonstrated good cyclic stability. The influence of Sb particle size (particularly at the nanoscale range) and the composition of Sb-carbon composites on the electrode performance, stability and charge storage mechanism is systematically evaluated here for the first time...
October 18, 2016: ACS Applied Materials & Interfaces
Peng Zheng, Ting Liu, Shouwu Guo
Superior first-cycle Coulomb efficiency (above 80%) is displayed by filter paper-derived micro-nano structure hard carbon, and it delivers a high reversible capacity of 286 mAh g(-1) after 100 cycles as the anode for Na-ion battery at 20 mA g(-1). These advantageous performance characteristics are attributed to the unique micro-nano structure, which reduced the first irreversible capacity loss by limiting the contact between the electrode and electrolyte, and enhanced the capacity by accelerating electron and Na-ion transfer through inter-connected nano-particles and nano-pores, respectively...
October 18, 2016: Scientific Reports
Yone-Han Mah, Chen-Hua Liu, Chi-Ling Chen, Tai-Chung Tseng, Chun-Jen Liu, Pei-Jer Chen, Ding-Shinn Chen, Jia-Horng Kao
BACKGROUND/PURPOSE: Clinical implications of IL28B gene in Taiwanese chronic hepatitis C (CHC) patients remain unknown. We thus investigated the prevalence and clinical implications of IL28B rs8099917 genotypes in CHC patients with different hepatitis C virus (HCV) genotypes and healthy controls. METHODS: A total of 200 HCV genotype 1 patients and 200 HCV genotype 2 patients who received liver biopsy, as well as 197 healthy controls were enrolled to determine the frequencies of IL28B rs8099917 genotypes...
October 14, 2016: Journal of the Formosan Medical Association, Taiwan Yi Zhi
Minhua Cao, Jinwen Qin, Bing Liu
Tin anode materials have attracted much attention due to their high theoretical capacity, although a rapid capacity fade is commonly observed mainly due to structural degradation from volume expansion. Here, we report a versatile strategy based on basil seed-inspired design for constructing monodisperse core-shell Sn@C hybrid confined in a carbon matrix (Sn basil seeds). Analogous to the structure of basil seeds soaked in water, Sn basil seeds have been taken to tackle this volume expansion problem in lithium ion batteries (LIBs)...
October 17, 2016: Chemistry, An Asian Journal
Junming Li, Yun Fu, Xiaodong Shi, Zhenming Xu, Zhian Zhang
Urchin-like ZnS microspheres decorated with nitrogen-doped carbon (ZnS@NC) are designed by a facile two-step method, in which the unrchin-like ZnS microspheres were coated by polydopamine and then calcined at inert gas ambient. When employed as the anode material for lithium ion batteries (LIBs) and sodium ion batteries (SIBs), the ZnS@NC electrode can exhibit a reversible lithium storage capacity of 690 mAh g-1 after 100 cycles at 100 mA g-1 and a reversible sodium storage capacity of 460 mAh g-1 after 80 cycles at 200 mA g-1...
October 14, 2016: Chemistry: a European Journal
Pei T Mah, Dunja Novakovic, Jukka Saarinen, Stijn Van Landeghem, Leena Peltonen, Timo Laaksonen, Antti Isomäki, Clare J Strachan
PURPOSE: To investigate the effect of compression on the crystallization behavior in amorphous tablets using sum frequency generation (SFG) microscopy imaging and more established analytical methods. METHOD: Tablets containing neat amorphous griseofulvin with/without excipients (silica, hydroxypropyl methylcellulose acetate succinate (HPMCAS), microcrystalline cellulose (MCC) and polyethylene glycol (PEG)) were prepared. They were analyzed upon preparation and storage using attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, scanning electron microscopy (SEM) and SFG microscopy...
October 13, 2016: Pharmaceutical Research
Geon-Kyu Sung, Ki-Joon Jeon, Cheol-Min Park
A layered GeS2 material was assessed as an electrode material in the fabrication of superior rechargeable Li-ion batteries. The electrochemical Li insertion/extraction behavior of the GeS2 electrode was investigated from extended X-ray absorption measurements as well as by cyclic voltammetry and differential capacity plots to better understand its Li insertion/extraction behavior. Using the Li insertion/extraction reaction mechanism of the GeS2 electrode, an interesting amorphous GeS2-based composite was developed and tested for use as a high-performance electrode...
October 13, 2016: ACS Applied Materials & Interfaces
Dingbin Xiao, Jinying Zhang, Xin Li, Dan Zhao, Hongyang Huang, Jialiang Huang, Daxian Cao, Zhihui Li, Chunming Niu
The morphology and hybridization of nanostructures are crucial to achieve properties for various applications. An in situ grown 3D MoS2 nano-mask has been adopted to control the morphology and hybridization of molybdenum compounds. The in situ generated MoS2 mask on MoO3 nanobelt surfaces allowed us to fabricate a 3D c-MoO2@MoS2 hybrid nanostructure, in which c-MoO2 is a carved MoO2 nanobelt with well distributed hole-pattern. The nano-masks have been controlled by adjusting the alignments of MoS2. The exposed MoO2 surfaces of c-MoO2@MoS2 were further sulphurated to give cw-MoO2@MoS2, in which all surfaces of MoO2 are wrapped by a few layers of MoS2...
October 12, 2016: ACS Nano
Kedi Cai, Rui Yang, Xiaoshi Lang, Qingguo Zhang, Zhenhua Wang, Tieshi He
Gradient Mn-La-Pt catalysts with three-layered structure of manganese dioxide (MnO2), lanthanum oxide (La2O3), and Platinum (Pt) for Li-O2 battery are prepared in this study. The mass ratio of the catalysts is respectively 5:2:3, 4:2:4, and 3:2:5 (MnO2: La2O3: Pt) which is start from the side of the electrolyte. The relationship between morphology structure and electrochemical performance of gradient catalyst is investigated by energy dispersive spectrometry and constant current charge/discharge test. The Li-O2 battery based on gradient Mn-La-Pt catalysts shows high discharge specific capacity (2707 mAh g(-1)), specific energy density (8400 Wh kg(-1)) and long cycle life (56 cycles)...
October 12, 2016: Scientific Reports
Yanming Ju, Yuan Meng, Yingjin Wei, Xiaofei Bian, Qiang Pang, Yu Gao, Fei Du, Bingbing Liu, Gang Chen
The demand for large-scale and high-safe energy storage is increasing rapidly due to the strong push for smartphone and electric vehicles. The Li+/Mg2+ hybrid-ion batteries (LMIBs) combing a dendrite-free deposition of Mg anode and Li+ intercalation cathode attract considerable attentions. Here we report a LMIB using the hydrothermal-prepared MoS2 nano flowers as the cathode material. The battery showed remarkable electrochemical properties with a large discharge capacity (243 mAh g-1 at the 0.1 C rate), excellent rate capability (108 mAh g-1 at the 5 C rate) and long cycle life (87...
October 11, 2016: Chemistry: a European Journal
Michael Mah, Kenji Takada
INTRODUCTION: When the mandibular permanent second molar becomes impacted, it is identified as a malocclusion that needs treatment as it often leads to unwanted complications such as caries and periodontitis of the adjacent permanent first molar. Other less common complications include root resorption of the adjacent first molar root or continued root development to be in close proximity to the inferior dental alveolar nerve. MATERIALS AND METHODS: This paper seeks to differentiate various levels of severity of impaction and review treatment options that are considered clinically available for the proper management of the impacted mandibular permanent second molar...
September 2016: L' Orthodontie Française
Hsin-Yi Wang, Han-Yi Chen, Ying-Ya Hsu, Ulrich Stimming, Hao Ming Chen, Bin Liu
We report that an ultrafast kinetics of reversible metal-ion insertion can be realized in anatase titanium dioxide (TiO2). Niobium ions (Nb5+) were carefully chosen to dope and drive anatase TiO2 into very thin nanosheets standing perpendicularly onto transparent conductive electrode (TCE) and simultaneously construct TiO2 with an ion-conducting surface together with expanded ion diffusion channels, which enabled ultrafast metal ions diffusion across the electrolyte/solid interface and into the bulk of TiO2...
October 11, 2016: ACS Applied Materials & Interfaces
Hung-Ju Yen, Hsinhan Tsai, Ming Zhou, Edward F Holby, Samrat Choudhury, Aiping Chen, Lyudmyla Adamska, Sergei Tretiak, Timothy Sanchez, Srinivas Iyer, Hanguang Zhang, Lingxiang Zhu, Haiqing Lin, Liming Dai, Gang Wu, Hsing-Lin Wang
Functionalized 3D nanographenes with controlled electronic properties have been synthesized through a multistep organic synthesis method and are further used as promising anode materials for lithium-ion batteries, exhibiting a much increased capacity (up to 950 mAh g(-1) ), three times higher than that of the graphite anode (372 mAh g(-1) ).
October 10, 2016: Advanced Materials
Kangzhe Cao, Lifang Jiao, Hang Xu, Huiqiao Liu, Hongyan Kang, Yan Zhao, Yongchang Liu, Yijing Wang, Huatang Yuan
A mini-hollow polyhedron Mn2O3is used as the anode material for lithium-ion batteries. Benefiting from the small interior cavity and intrinsic nanosize effect, a stable reconstructed hierarchical nanostructure is formed. It has excellent energy storage properties, exhibiting a capacity of 760 mAh g(-1) at 2 A g(-1) after 1000 cycles. This finding offers a new perspective for the design of electrodes with large energy storage.
March 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
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