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"Discharge process"

Peng Zhang, Shiling Zheng, Jia Liu, Bingchen Wang, Fanghua Liu, Yujie Feng
Biochar has been reported to facilitate direct interspecies electron transfer (DIET) in co-cultures between Geobacter metallireducens and Geobacter sulfurreducens, a model defined co-culture system. In this study, the biochar derived from the activated sludge with different pyrolysis temperature was added to the co-cultures, the ethanol metabolism rates (Re) and succinate production rates (Rs) of co-culture with biochar-800 were 1.05- and 1.42-fold higher than that without addition. The results suggested that the conductivity of the biochar did not correlate with the facilitating effect of the biochar on the co-culture metabolism...
June 5, 2018: Water Research
Ling-Li Xing, Xu Wu, Ke-Jing Huang
A three-dimensional (3D) flower-shaped Li4 Ti5 O12 -graphene (Gr) hybrid micro/nanostructures and pine needles derived carbon nanopores (PNDCN) has been prepared by using the effective hydrothermal process. Due to the unique micro/nanostructures which can provide abundant surface active sites, the obtained 3D Li4 Ti5 O12 -Gr displays a high specific capacitance of 706.52 F g-1 at 1 A g-1 . The prepared PNDCN also exhibits high specific capacitance of 314.50 F g-1 at 1 A g-1 benefiting from its interconnected honeycomb-like hierarchical and open structure, which facilitates the diffusion and reaction of electrolyte ions and enables an isotropic charging/discharging process...
June 5, 2018: Journal of Colloid and Interface Science
Chuanchao Sheng, Fengjiao Yu, Yuping Wu, Zhangquan Peng, Yuhui Chen
Sodium oxygen battery is a promising metal-air battery however the discharge process is not well understood and the major discharge product is still under debate. The discharge products determined the theoretical specific energy and electrochemical performance of the battery. Here we demonstrate that NaO2 spontaneously disproportionates to Na2O2, no matter it is dissolved in solution or staying on the surface. The behaviors of NaO2 in solution and on the surface are different. For the first time, we demonstrate that solvents play a crucial effect on the disproportionation of dissolved NaO2 species, which is fast in low donor number (DN) solvents like acetonitrile but sluggish in high DN solvents like DMSO...
June 11, 2018: Angewandte Chemie
Rui Xu, Shili Ye, Kunqi Xu, Le Lei, Sabir Hussain, Zhiyue Zheng, Fei Pang, Shuya Xing, Xinmeng Liu, Wei Ji, Zhihai Cheng
Understanding the process of charge generation, transfer, and diffusion between two-dimensional (2D) materials and their supporting substrates is very important for the potential applications of 2D materials. Comparing with the systematic studies of triboelectric charging in bulk sample, a fundamental understanding about the triboelectrification of 2D materials/insulators system is rather limited. Here, the charges transfer and diffusion of both SiO2 surface and MoS2/SiO2 interface through contact electrification and frictional electrification are investigated systematically in-situ by scanning kelvin probe microscopy (SKPM) and dual harmonic electrostatic force microscopy (DH-EFM)...
June 6, 2018: Nanotechnology
Teresa A Pollack, Vidhya Illuri, Rebeca Khorzad, Grazia Aleppo, Diana Johnson Oakes, Jane L Holl, Amisha Wallia
Objectives: Describe the application of a risk assessment to identify failures in the hospital discharge process of a high-risk patient group, liver transplant (LT) recipients with diabetes mellitus (DM) and/or hyperglycaemia who require high-risk medications. Design: A Failure Modes, Effects and Criticality Analysis (FMECA) of the hospital discharge process of LT recipients with DM and/or hyperglycaemia who required DM education and training before discharge was conducted using information from clinicians, patients and data extraction from the electronic health records (EHR)...
2018: BMJ Open Quality
Zihan Song, Hongzhang Zhang, Kai Feng, Huaiqing Wang, Xianfeng Li, Huamin Zhang
The low specific capacity of graphite limits the further increase of the energy density of lithium-ion batteries and their widespread applications. Exploring new anode materials is the key issue. Herein, a new mullite-type compound Bi2Mn4O10 is designed and synthesized. The Bi2Mn4O10/C composite delivers a high reversible specific capacity of 846 mA h g-1 (more than twice that of graphite), and exhibits a high capacity retention of 100% after 300 cycles at 600 mA g-1, which is reported for the first time. The high specific capacity originates from the combination of the conversion reaction and alloying-dealloying reaction, which has been confirmed by the ex situ XRD, IR, SEM and TEM studies...
May 29, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
G Gnana Kumar, Sheng-Heng Chung, T Raj Kumar, Arumugam Manthiram
Despite their high energy density and affordable cost compared to Li-ion batteries, lithium-sulfur (Li-S) batteries still endure from slow reaction kinetics and capacity loss induced by the insulating sulfur and severe polysulfide diffusion. To address these issues, we report here nickel nanoparticles filled in vertically grown carbon nanotubes on graphene sheets (graphene-carbon nanotube-nickel composite (Gr-CNT-Ni)) that are coated onto a polypropylene separator as a polysulfide trap for the construction of high-loading sulfur cathodes...
May 25, 2018: ACS Applied Materials & Interfaces
Shi-Hao Zhang, Bang-Gui Liu
Excellent monolayer electrode materials can be used to design high-performance alkali-metal-ion batteries. Here, we propose two-dimensional ReN$_2$ monolayers as superior sodium-ion battery materials. Our total-energy optimization results in a buckled tetragonal structure for ReN$_2$ monolayer, and our phonon spectrum and elastic moduli prove that it is dynamically and mechanically stable. Further investigations show that it is metallic and still keep metallic feature after the adsorption of Na or K atoms, and the absorption of Na (or K) atoms changes the lattice parameters by 3...
May 23, 2018: Nanotechnology
Hao Wan, Hao Xiong, Xiaohe Liu, Gen Chen, Ning Zhang, Haidong Wang, Renzhi Ma, Guanzhou Qiu
On account of its high theoretical capacity, silicon (Si) has been regarded as a promising anode material for Li-ion batteries. Extracting Si content from earth-abundant and low-cost aluminosilicate minerals, rather than from artificial silica (SiO2) precursors, is a more favorable and practical method for the large-scale application of Si anodes. In this work, three-dimensionally interconnected (3D-interconnected) Si frameworks with a branch diameter of ∼15 nm are prepared by the reduction of amorphous SiO2 nanotubes derived from natural halloysite clay...
May 23, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
K Krishnaveni, R Subadevi, G Radhika, T Premkumar, M Raja, Wei-Ren Liu, M Sivakumar
A sulfur-Polyacrylonitrile (PAN)-acetylene black (AB) composite was synthesized via thermal treatment processes. The as-prepared ternary composite was characterized by expending transmission electron microscopy (TEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) and electrochemical investigations. The improved electrochemical performance can be attributed to the formation of PAN layer, which can keep a tight contact between carbon and sulfur which leads to improve the conductivity. Moreover, the PAN can also act as a flexible cushion to accommodate volume changes of sulfur cathode as well as a barrier to trap soluble polysulfide intermediates during the charge-discharge process...
January 1, 2018: Journal of Nanoscience and Nanotechnology
Guozhen Zhu, Qing Li, Renchao Che
TiNb2O7 with high charge/discharge voltage (1.65 V), long life span and excellent reversibility has become a new anode material for lithium ion batteries in recent years. However, the inherent poor electronic conductivity strictly limits its practical applications. Herein, we first report a hollow TiNb2O7@C spheres with carbon spheres as sacrificial template. The special hollow structure can effectively relieve the volume expansion during the repeated process of charging/discharging. The conductivity of hollow TiNb2O7 spheres can be greatly improved by the carbon layers uniformly coated outside the surface of TiNb2O7 spheres...
May 15, 2018: Chemistry: a European Journal
Lei Zhang, Binwei Zhang, Yuhai Dou, Yunxiao Wang, Mohammad Al-Mamun, Xianluo Hu, Huakun Liu
We report the use of double-carbon-shell passion fruit-like porous carbon microspheres (PCMs) as the sulfur substrate in the room temperature sodium sulfur (RT Na-S) batteries. PCMs are encapsulated with the integrate microsized carbon coating layers on the outside and composed of the interconnected nanosized hollow carbon beads inside, leading to a special multidimensional scaling double-carbon-shell structure with high electronic conductivity and strengthened mechanical properties. Sulfur was filled inside the PCMs (PCMs-S) and protected by the unique double-carbon-shell, which means the following generated intermediate sodium polysulfide species cannot be exposed to the electrolyte directly and well protected inside...
May 15, 2018: ACS Applied Materials & Interfaces
Y Pan, W M Guan
The intermediate product Li2 S2 plays a pivotal role in the charge/discharge process of lithium-sulfur batteries. However, the structural configuration and relevant properties of Li2 S2 are unclear. In this work, by using ab initio calculations, we present results of novel phases, average open circuit voltages ( Voc s), and electronic properties of the stable Li2 S2 . Two new Li2 S2 phases are predicted: orthorhombic ( Cmca) and orthorhombic ( Immm) structures. The calculated Voc s of hexagonal ( P63 / mmc), orthorhombic ( Cmca), and orthorhombic ( Immm) are 3...
May 14, 2018: Inorganic Chemistry
Marianne Wyder, Steve Kisely, Carla Meurk, Josie Dietrich, Teresa Fawcett, Dan Siskind, Gail Robinson, David Crompton
OBJECTIVE: This study describes the impact of Motivational Aftercare Planning (MAP) - an intervention to increase consumer/clinician collaboration on the content of mental health recovery plans. The intervention focussed on enhancing existing discharge processes in psychiatric inpatient wards and supporting nursing staff in using motivational interviewing techniques to facilitate the completion of these plans. METHODS: We conducted a qualitative thematic content analysis of the recovery plans completed throughout the study ( n = 110)...
May 1, 2018: Australasian Psychiatry: Bulletin of Royal Australian and New Zealand College of Psychiatrists
Barbara J King, Andrea L Gilmore-Bykovskyi, Tonya J Roberts, Korey A Kennelty, Jacquelyn F Mirr, Michael B Gehring, Melissa N Dattalo, Amy J H Kind
Background: Twenty-five percentage of patients who are transferred from hospital settings to skilled nursing facilities (SNFs) are rehospitalized within 30 days. One significant factor in poorly executed transitions is the discharge process used by hospital providers. Objective: The objective of this study was to examine how health care providers in hospitals transition care from hospital to SNF, what actions they took based on their understanding of transitioning care, and what conditions influence provider behavior...
May 8, 2018: Gerontologist
Yu Wang, Xiaomin Li, Yan Gao, Hongjuan Zhang, Dong Wang, Baoquan Jin
Partial discharge detection is crucial for electrical cable safety evaluation. The ultrasonic signals frequently generated in the partial discharge process contains important characteristic information. However, traditional ultrasonic transducers are easily subject to strong electromagnetic interference in environments with high voltages and strong magnetic fields. In order to overcome this problem, an optical fiber Sagnac interferometer system is proposed for partial discharge ultrasound detection. Optical fiber sensing and time-frequency analysis of the ultrasonic signals excited by the piezoelectric ultrasonic transducer is realized for the first time...
May 4, 2018: Sensors
Wei Yu, Huwei Wang, Lei Qin, Junyang Hu, Liang Liu, Baohua Li, Dengyun Zhai, Feiyu Kang
Understanding the electrochemical property of superoxides in alkali metal oxygen batteries is critical for the design of a stable oxygen battery with high capacity and long cycle performance. In this work, a KO2 -decorated binder-free cathode is fabricated by a simple and efficient electrochemical strategy. KO2 nanoparticles are uniformly coated on the carbon nanotube film (CNT-f) through a controllable discharge process in the K-O2 battery, and the KO2 -decorated CNT-f is innovatively introduced into the Li-O2 battery as the O2 diffusion electrode...
May 3, 2018: ACS Applied Materials & Interfaces
Sedigheh Seyedfarajollah, Fatameh Nayeri, Sharareh R Niakan Kalhori, Marjan Ghazisaeedi, Leila Keikha
Introduction: The development of comprehensive discharge plan system Not only, will facilitate the discharge process, increase staff and parent satisfaction, improve the care of preterm infants, also reduce the human error. Aim: to determine duties, components and capabilities of NICU discharge plan system as a multidimensional tool for facilitating the complex process of transition preterm infants to the home and support parents for post-discharge care. Method: The descriptive and qualitative study conducted in 2017...
2018: Acta Informatica Medica: AIM
Daohao Li, Yuanyuan Sun, Shuai Chen, Jiuyong Yao, Yuhui Zhang, Yanzhi Xia, Dongjiang Yang
The nanostructured metal sulfides have been reported as promising anode materials for sodium-ion batteries (SIBs) due to their high theoretical capacities but have suffered from the unsatisfactory electronic conductivity and poor structural stability during a charge/discharge process, thus limiting their applications. Herein, the one-dimensional (1D) porous FeS/carbon fibers (FeS/CFs) micro/nanostructures are fabricated through facile pyrolysis of double-helix-structured Fe-carrageenan fibers. The FeS nanoparticles are in situ formed by interacting with sulfur-containing group of natural material ι-carrageenan and uniformly embedded in the unique 1D porous carbon fibrous matrix, significantly enhancing the sodium-ion storage performance...
May 23, 2018: ACS Applied Materials & Interfaces
Sang Ha Lee, Jeong Hun Lee, Dong Ho Nam, Misuk Cho, Jaehoon Kim, Chalathorn Chanthad, Youngkwan Lee
Polymeric binder is extremely important for Si-based anode in lithium-ion batteries due to large volume variation during charging/discharging process. Here, natural rubber-incorporated chitosan networks were designed as a binder material to obtain both adhesion and elasticity. Chitosan could strongly anchor Si particles through hydrogen bonding, while the natural rubber could stretch reversibly during the volume variation of Si particles, resulting in high cyclic performance. The prepared electrode exhibited the specific capacities of 1350 mAh/g after 1600 cycles at the current density of 8 A/g and 2310 mAh/g after 500 cycles at the current density of 1 A/g...
May 16, 2018: ACS Applied Materials & Interfaces
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