batterydata/paper-abstracts huggingface dataset:
The frequent occurrence of natural disasters is a major threat to the property and casualties of human beings in recent decades. Disaster prone points can be very closely monitored by augmenting the distribution of wireless sensor networks. However, replacing the battery of electronics regularly remains a significant challenge especially in a remote area. In this study, we report a wind-driven hybridized energy harvester which is designed for rotating energy harvesting and can be integrated with WSN technology to develop a self-powered natural disaster monitoring system. In this harvester, the rotator is directly driven by external rotational motion thus can easily hybridize the TENG with eighteen EMGs. Consequently, the fully packaged WH-EH device combining with the water-proof flexible solar cell can be completely isolated from the harsh wilderness environment. The output feature of TENG of high voltage but low current that perfectly compensate for the differing performance of EMG to achieve an excellent output power of the hybrid device with a broad frequency range. Moreover, the WH-EH is capable of lighting hundreds of LEDs and powering small electronics. The quick-acting charging ability of a capacitor by the WH-EH was conducted effectively in experimental tests. Finally, three self-powered sensor systems enabled by a single WH-EH were discussed and demonstrated, including a temperature sensor for forest fire detection, a vibration sensor for earthquake monitoring and a wireless transceiver for alarm information spreading. Obviously, the invention of the hybridized nanogenerator will be of great importance to promote the development of self-powered wireless sensor networks and provide a sustainable power-supply solution to long-term natural disaster monitoring stations in residential or remote areas.
Polymeric gel electrolytes (PGE), based on polyacrylonitrile blended with poly(vinylidene fluoride-co-hexafluoropropylene) (P(VdF-co-HFP)), which are reinforced with glass-fibre cloth (GFC) to increase the mechanical strength, are prepared for the practical use in lithium secondary batteries. The resulting electrolytes exhibit electrochemical stability at 4.5V against lithium metal and a conductivity value of (2.0–2.1)×10−3 Scm−1 at room temperature. The GFC–PGE electrolytes show excellent strength and flexibility when used in batteries even if they contain a plasticiser. A test cell with LiCoO2 as a positive electrode and mesophase pich-based carbon fibre (MCF) as a negative electrode display a capacity of 110mAhg−1 based on the positive electrode weight at the 0.2C rate at room temperature. Over 80% of the initial capacity is retained after 400 cycles. This indicates that GFC is suitable as a reinforcing material to increase the mechanical strength of gel-based electrolytes for lithium secondary batteries.
Perfectly aligned silicon microwire arrays show exceptionally high cycling stability with record setting (high) areal capacities of 4.25 mAh cm−2. Those wires have a special, modified length and thickness in order to perform this good. Geometry and sizes are the most important parameters of an anode to obtain batteries with high cycling stability without irreversible losses. The wires are prepared with a unique etching fabrication method, which allows to fabricate wires of very precise sizes. In order to investigate how good randomly oriented silicon wires perform in contrast to the perfect order of the array, the wires are embedded in a paste. This study reveals the fundamental correlation between geometry, mechanics and charge transfer kinetics of silicon electrodes. Using a suitable RC equivalent circuit allows to evaluate data from cyclic voltammetry and simultaneous FFT-Impedance Spectroscopy (FFT-IS), yielding in time-resolved resistances, time constants, and their direct correlation to the phase transformations. The change of the resistances during lithiation and delithiation correlates to kinetics and charge transfer mechanisms. This study demonstrates how the mechanical and physiochemical interactions at the silicon/paste interface inside the paste electrodes lead to void formation around silicon and with it to material loss and capacity fading.
Potassium-ion batteries attract tremendous attention for large scale application due to the abundance of K resources. Herein, a highly disordered hard carbon derived from a skimmed cotton is investigated for this purpose. The study shows that a simple soaking treatment in hydrochloric acid for the skimmed cotton before its high-temperature carbonization can critically impact the structure and the electrochemical properties of the obtained hard carbon significantly. This hard carbon exhibits a high initial coulombic efficiency (73%) and superior cycling stability and rate capability (253 mAh g−1 and 165 mAh g−1 at 40 mA g−1 and 4000 mA g−1, respectively) due to its unique porous architecture and large surface area. The full cell by coupling the hard carbon with a cathode material, i.e. potassium-rich iron hexacyanoferrate shows an outstanding electrochemical performance. These promising properties highlight the potentials of such a hard carbon in practical applications.
Asymmetric supercapacitors (ASCs) have played a leading role in realizing energy storage devices with high energy and power densities. While both anode and cathode materials are important for high performance ASCs, more research effort has been devoted to developing cathode materials because the energy source of an ASC is mostly attributed to the cathode. However, the development of anode materials is essential in order to achieve high power density as well as stable long-term cycle life of ASCs. In this study, functionalized graphene aerogel (GA) decorated with palladium (Pd) nanoparticles is used as an efficient ASC anode material. The high surface area (328m2 g−1) and low electrical resistivity (50 times lower than one without Pd) of the GA composite grants a high specific capacitance (175.8Fg−1 at 5mVs−1), excllent rate capability (48.3% retention after a 10 fold increase of scan rate), and remarkable reversibility. ASCs assembled from manganese dioxide (cathode) and GA composite (anode) show stable extended cell voltage, fast charge–discharge capability, excellent cycle stability (89.6% retention after 3000 cycles), and high energy and power densities (average of 13.9Whkg−1 and 13.3kWkg−1). These results demonstrate the great potential of the GA composite as an efficient anode material for high performance energy storage devices.
Polyvinyl alcohol (PVA) was used as a hydrogen bond functionalizing agent to modify multi-walled carbon nanotubes (CNTs). Nanoparticles of Fe3O4 were then formed along the sidewalls of the as-modified CNTs by the chemical coprecipitation of Fe2+ and Fe3+ in the presence of CNTs in an alkaline solution. The structure and electrochemical performance of the Fe3O4/CNTs nanocomposite electrodes have been investigated in detail. Electrochemical tests indicated that at the 145th cycle, the CNTs–66.7wt.%Fe3O4 nanocomposite electrode can deliver a high discharge capacity of 656mAhg−1 and stable cyclic retention. The improvement of reversible capacity and cyclic performance of the Fe3O4/CNTs nanocomposite could be attributed to the nanosized Fe3O4 particles and the network of CNTs.
Nanosized cryptomelane manganese dioxide (MDO) and its SnO2-coated product were prepared through a redox reaction between KMnO4 and Mn(II) acetate. XRD analysis showed the cryptomelane-type structure for both materials. Chemical analysis detected the presence of K in parent and K and Sn in coated oxide. The coating was evidenced by TEM images, which display a thin layer of SnO2 at the surface of nanosized MnO2 particles. Vibrational spectroscopic measurements confirmed the integrity of the MnO2 lattice. The net effect of the SnO2 coating results in better electrochemical performance of the Li//MnO2 cells.
The state of health (SOH) and remaining useful lifetime (RUL) estimation are important parameters for battery health forecasting as they reflect the health condition of battery and provide a basis for battery replacement. This study proposes a novel on-line synthesis method based on the fusion of partial incremental capacity and artificial neural network (ANN) to estimate SOH and RUL under constant current discharge. Firstly, the advanced filter methods are applied to smooth the initial incremental capacity curves. Then the strong correlation feature values are extracted from the partial incremental curves by using correlation analysis methods. Finally, two ANN models aiming at estimating SOH and RUL are established to estimate the SOH and RUL simultaneously. The training and verification results indicate that the proposed method has highly reliability and accuracy for SOH and RUL estimation.
This paper deals with design of hybrid energy system consisting of wind and photovoltaic with battery storage. A diesel generator is added to ensure continuous power supply and to take care of intermittent nature of wind and photovoltaic. The paper reports results of the technical–economic optimization study of photovoltaic/wind/diesel hybrid with battery storage in Algeria. The primary objective of this study is to estimate the appropriate dimension of stand-alone hybrid photovoltaic/wind/diesel with battery storage that guarantee the energy autonomy of typical remote consumer with lowest cost of energy. A secondary aim is to study the impact of renewable energy potential quality on the system size. The optimum dimensions of the system are defined for six sites in Algeria. In this context, a complete sizing model is developed in Matlab/Simulink V.6.5, able to predict the optimum system configuration. The simulation results indicate that the hybrid system is the best option for all the sites considered in this study. Thus, it provides higher system performance than photovoltaic or wind alone. It s shown that the principal advantage of photovoltaic/wind/diesel hybrid with battery storage are used all together, the reliability of the system is enhanced. The economic analysis has resulted in the calculation of kWh cost of energy for different types of resources and optimized cost of hybrid energy system. It s revealed too that the energy cost depends largely on the renewable energy potential quality. So, our objective for the optimization parameters is not the production cost but the offered service.
In this work an experimental setup for in-operando temperature measurements across the interfaces anode – separator/electrolyte – cathode of a lithium-ion battery cell is developed to get a better understanding of the heat generating mechanisms. The results show differences in the heat evolution rates of the anode, the separator and the cathode according to the electrochemical reactions, the state of charge, the overvoltage and the electric current density. The LiCoO2 cathode was identified as the most decisive component for the heat evolution in the investigated battery stack. Changes of the ohmic resistance and the entropy of LiCoO2 with the state of charge were reflected by the temperature measurements.
Patient safety has been regarded as the most important quality policy of hospital management. The medicine dispensing definitely plays an influential role in the Joint Commission International Accreditation Standards. The problem we are going to discuss in this paper is that the function of detecting mistakes does not exist in the Automatic Tablets packaging machine (ATPM) in the hospital pharmacy department when the pharmacists implement the replenishment of cassettes. In this situation, there are higher possibilities of placing the wrong cassettes back to the wrong positions, so that the human errors will lead to a crucial impact on total inpatients undoubtedly. Therefore, this study aims to design the RFID (Radio frequency identification) position based system (PBS) for the ATPM with passive high frequency (HF) model. At first, we placed the HF tags on each cassette and installed the HF readers on the cabinets for each position. Then, the system works on the reading loop to verify ID numbers and positions on each cassette. Next, the system would detect whether the orbit opens or not and controls the readers’ working power consumption for drug storage temperature. Finally, we use the RFID PBS of the ATPM to achieve the goal of avoiding the medication errors at any time for patient safety.
Single-cell genetic screens can be incredibly powerful, but current high-throughput platforms do not track dynamic processes, and even for non-dynamic properties they struggle to separate mutants of interest from phenotypic outliers of the wild-type population. Here we introduce SIFT, single-cell isolation following time-lapse imaging, to address these limitations. After imaging and tracking individual bacteria for tens of consecutive generations under tightly controlled growth conditions, cells of interest are isolated and propagated for downstream analysis, free of contamination and without genetic or physiological perturbations. This platform can characterize tens of thousands of cell lineages per day, making it possible to accurately screen complex phenotypes without the need for barcoding or genetic modifications. We applied SIFT to identify a set of ultraprecise synthetic gene oscillators, with circuit variants spanning a 30-fold range of average periods. This revealed novel design principles in synthetic biology and demonstrated the power of SIFT to reliably screen diverse dynamic phenotypes.
An all-solid state symmetric monolithic sodium ion battery operating at 200 °C is described, using NASICON-type electrodes and electrolyte. Na3V2(PO4)3 is used at both electrodes as the active material while Na3Zr2Si2PO12 stands the role of the Na+ solid electrolyte. Both compositions present order-disorder phase transitions and present decent ionic conductivity properties, 1.5 × 10−3 S cm−1 and 1.9 × 10−4 S cm−1 at 200 °C for Na3Zr2Si2PO12 and Na3V2(PO4)3, respectively. The full battery (560 μm in thickness) was assembled in a 10′ single step by spark plasma sintering at 900 °C. The electrochemical characteristics at high temperature (200 °C) were evaluated thanks to a new experimental set-up. The battery operates at 1.8 V with 85% of the theoretical capacity attained at C/10 with satisfactory capacity retention, for an overall energy density of 1.87 × 10−3 W h cm−2 and a capacity of 1.04 mA h cm−2.
The development of high-performance and cost-effective electrodes for oxygen evolution and oxygen reduction is critical for enabling the use of energy storage devices based on O2–H2O chemistries such as metal–air batteries and unitized regenerative fuel cells (URFCs). Herein, we report a precious-metal-free and carbon-free O2 electrode synthesized via electrodeposition of manganese oxide (MnOx) on a stainless steel (SS) substrate followed by high-temperature calcination at 480 °C. The MnOx–SS electrode displays high oxygen reduction and water oxidation activities when tested in an electrochemical cell, comparable to that of a precious-metal based electrode, Pt/C–SS. Accelerated durability testing reveals the excellent stability of the MnOx–SS electrode compared to both the Pt/C–SS electrode and a carbon-based electrode with MnOx and Ni catalysts. This can be rationalized by the carbon-free nature of the MnOx–SS electrode which circumvents carbon corrosion at the high electrochemical potentials during water oxidation and O2 reduction. Integrating the MnOx–SS electrode as the O2 electrode into an anion exchange membrane (AEM) URFC produces round-trip efficiencies of 42–45% at 20 mA cm−2 over 10 cycles, and exhibits significantly enhanced durability compared to the carbon-based analogue. This work demonstrates the MnOx–SS electrode's potential for use as a high performance, scalable, precious-metal-free and carbon-free O2 electrode in AEM-URFCs and metal–air batteries.
Mental disorders (MD), such as depression, anxiety, and cognitive impairment, are highly prevalent in patients with coronary heart disease (CHD). Current guidelines on cardiovascular diseases recommend screening and appropriate treatment of MD; however, the degree of implementation of such recommendations in clinical practice is unknown. This study aims to analyze the quality of health care of patients with CHD and MD. Specifically, we aim to analyze (1) the quality of care, (2) trajectories of care, and (3) barriers regarding the detection and treatment of MD. Moreover, we want to identify potentials of changes in health care delivery towards more patient-centered care. The results of this study shall be the first step towards value-based care of people with CHD and comorbid mental disorders.
The electrochemical polymerization of 2-aminobenzene sulfonic acid, also called ortanilic acid (o-ASA), on a gold electrode precoated with polyaniline (PANI), has been carried out. We proved that the electropolymerization of o-ASA is enhanced on PANI electrodes, resulting in thicker films obtained in aqueous media at room temperature. The electrosynthesized film (P(o-ASA)) was characterized by cyclic voltammetry, FTIR and nuclear magnetic resonance. The compensation of P(o-ASA) charge was evaluated using electrochemical quartz crystal microbalance combined with cyclic voltammetry, which showed that the electroneutralization process mainly involves cations. Additionally, copolymers of aniline and o-ASA were electrosynthesized, using a metallic electrode modified with PANI also as a working electrode. The degree of sulfanation of copolymers has been modulated with the proportions of monomers in the electrosynthesis solution. The studies reveal a more important participation of cations in fully sulfonated polyaniline than in partially sulfonated polyaniline.
Six electrolytes were investigated for lithium metal battery applications. The electrolytes were composed of combinations of four different salts (LiPF6, LiB(C2O4)2, LiI and LiN(SO2CF3)2) and three different solvents (PC, DME, and 1,3-dioxolane). All six electrolytes had conductivities >3mScm−1 at temperatures from −20 to 40°C. Electrochemical impedance spectroscopy (EIS) and linear polarization, both at room temperature and low temperature (−8°C), provided congruent results. The LiI-based electrolyte had the lowest film resistance, while 0.7M LiB(C2O4)2–PC:DME (1:1) had the highest impedance. The presence of 1,3-dioxolane in electrolytes provided lower impedance with LiB(C2O4)2 but higher resistance with LiPF6-based electrolytes. NMR analysis of electrolytes after thermal abuse indicate that LiN(SO2CF3)2-based electrolytes are the most thermally stable. SEM analysis suggests that surface modification and impedance changes are correlated.
The health of chickens and the welfare of poultry industry are central to the efforts of addressing global food security. Therefore, it is essential to study chicken immunology to maintain and improve its health and to find novel and sustainable solutions. This paper presents a study on investigation of the effect of Scutellaria baicalensis root (SBR) on the immune response of broiler chicken, especially on lymphocytes and heterophils reactivity, regarding their contribution to the development of immunity of the chickens.
The Publisher regrets that this article is an accidental duplication of an article that has already been published in MLBLUE, 138 (2015) 259–261, http://dx.doi.org/10.1016/j.electacta.2014.10.094. The duplicate article has therefore been withdrawn. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/locate/withdrawalpolicy.
In solid state batteries, lithium dendrites form when the applied current density is higher than a critical value. The critical current density is often reported as 1–2 mA cm−2 at an external pressure of around 10 MPa. In this work, a more advanced mechanical constriction technique is applied on a solid-state battery constructed with Li10GeP2S12 (LGPS) as the electrolyte and a lithium metal/graphite composite as the anode, where the graphite layer was applied to prevent (electro-)chemical reactions between Li metal and LGPS, as well as a short-circuit upon the application of pressure. The decomposition pathway of LGPS at the anode interface is modified by this mechanical constriction design, and the growth of lithium dendrites is inhibited, leading to excellent rate and cycling performances. No short-circuit or lithium dendrite formation is observed for batteries cycled at a current density up to 10 mA cm−2.
Nanostructured ternary TiNi-type alloys, namely Ti0.8M0.2Ni (M = Zr, V), TiNi0.8N0.2 (N = Cu, Mn) and TiNi1−xMnx (x = 0.2, 0.4, 0.6, 1.0), were synthesized by mechanical alloying. Depending on the intensity and time of milling alloys with different microstructure were obtained. The as-milled TiNi1−xMnx alloys contain substantial amount of amorphous phase, which crystallizes during annealing. Annealing of the as-milled fine nanocrystalline materials at 500 °C results only in slight coarsening of the microstructure, which remains still nanocrystalline. Fully crystalline material (with crystal size larger than 50 nm), consisting of mainly cubic TiNi was obtained by annealing the ball-milled alloys at T ≥ 700 °C. Electrochemical hydrogen charge/discharge cycling of the as-milled as well as of annealed alloys were carried out at galvanostatic conditions. It was found that among the nanocrystalline Ti0.8M0.2Ni0.8N0.2 (M = Zr, V; N = Cu, Mn) alloys TiNi0.8Mn0.2 revealed the highest discharge capacity of 56 mAh g−1 in the as-milled state and 75 mAh g−1 after short-time annealing at 500 °C. Annealing at higher temperature does not increase the capacity further. The as-milled TiNi1−xMnx alloys with x ≤ 0.4 reveal noticeably higher discharge capacity and better cycle life than the Mn-richer alloys. Based on potentiostatic experiments the diffusion coefficients of hydrogen into TiNi alloys in two different microstructural states (fine and coarser nanocrystalline) as well as in as-milled amorphous/nanocrystalline and nanocrystalline TiNi0.8Mn0.2 were determined. The hydrogen diffusion coefficients of the TiNi alloys are comparable (1.9–2.7 × 10−12 cm2 s−1). The diffusion coefficient in the as-milled amorphous/nanocrystalline TiNi0.8Mn0.2 was found to be 3–4 times higher than that of the as-milled nanocrystalline alloy.
Na2Zn2TeO6 is a potential sodium solid electrolyte of all-solid-state sodium-ion batteries. In this work, Na+ ion conductivity and electrochemical performance of layered Ca-doped Na2Zn2-x Ca x TeO6 (x = 0–0.05) (NZTO-Cx) electrolytes have been investigated. The highest conductivity has been achieved 7.54 × 10−4 S cm−1 in NZTO-Cx at x = 0.02, at room temperature due to grain-boundary modification and interlayer-interface elimination. Meanwhile, chemical stability with metallic Na anode and electrochemical window of NZTO-Cx are improved by Ca doping. Furthermore, the cycle stability of Na3V2(PO4)3/NZTO-Cx/Na solid-state batteries have been successfully increased by Ca doping. These advantages highly demonstrate good potential application prospect of NZTO-Cx in all-solid-state sodium-ion batteries.