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Contribution to the understanding of the performance differences between commercial current collectors in Li–S batteries

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Journal of energy Chemistry 2021年第11期30卷 295-306,I0007页

作者： A.Benitez F.Luna-Lama ACaballero e.rodriguez-Castellon J.Morales Dpto.Química Inorgánica e Ingeniería Química Instituto Universitario de Nanoquímica(IUNAN)Universidad de Córdoba14071 CórdobaSpain Dpto.de Química Inorgánica Cristalografía y MineralogíaFacultad de CienciasUniversidad de Málaga29071 MálagaSpain

Lithium–sulfur batteries have been recognised as highly promising next-generation batteries, due to their low cost and high theoretical energy density. Despite numerous advances in this technology over the last decade, its commercialisation is still a challenge that has not yet been achieved. Many efforts have been made to improve the problems that these batteries present, mainly by investigating different cathode manufacturing strategies, testing novel Li anodes, new additives in the electrolytes, and modified separators or interlayers. However, the characteristics of the current collectors used in the preparation of the electrodes have been rarely addressed. Three commercial collectors are commonly used in basic research on Li–S batteries: Al foil, carbon coated Al foil (Al-C), and carbon paper (gas diffusion layer, GDL). In this work, a detailed study of the electrochemical response of these commercial collectors has been carried out. The tests were carried out on two S composites formed by carbons of a different natures, commercial carbon black and synthetic N-doped graphene. In addition, the S impregnation method was different, using either melt diffusion at 155 ℃ or ethylenediamine as S solvent, respectively. In both systems, the results were similar – the electrodes supported on GDL delivered higher specific capacities than those supported on Al and Al-C, with minimal differences between the two. Of the different collector properties examined to explain this behaviour, namely Al corrosion, electrical conductivities, surface-level composition, and surface texture, only the latter had a significant effect in the performance of GDL-based electrodes. SeM images revealed a rough and cracked surface formed by the agglomerated carbon particles that give rise to a complex pore system, predominantly consisting of macropores. All of these features are beneficial for a better anchoring of the active material on the collector surface, in addition to enhancing the wettability of the electrolyte and favouring reaction k

关键词： Current collector Carbon paper Aluminum foil Lithium–sulfur battery

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Finger pad friction and tactile perception of laser treated,stamped and cold rolled micro-structured stainless steel sheet surfaces

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Friction 2017年第2期5卷 207-218页

作者： S.ZHANG X.ZeNG D.T.A MATTHeWS A.IGARTUA e.rodriguez-VIDAL J.CONTReRAS FORTeS e.VAN DeR HeIDe State Key Laboratory of Tribology Tsinghua University Beijing 100084 ChinaLaboratory for Surface Technology and Tribology Faculty of Engineering Technology University of Twente Drienerlolaan 5 Enschede 7522 NB the Netherlands Shanghai Advanced Research Institute Chinese Academy of Sciences China Laboratory for Surface Technology and Tribology Faculty of Engineering Technology University of Twente Drienerlolaan 5 Enschede 7522 NB the NetherlandsTata Steel Research & Development PO Box 10000 IJmuiden 1970CA the Netherlands IK4-Tekniker C/Ignacio Goenaga 5 Eibar 20600 Spain Acerinox europa SAU Los Barrios Spain Laboratory for Surface Technology and Tribology Faculty of Engineering Technology University of Twente Drienerlolaan 5 Enschede 7522 NB the NetherlandsTU Delft Faculty of Civil Engineering and Geosciences Stevinweg 1 Delft 2628 CN the Netherlands

Tactile perception is a complex system, which depends on frictional interactions between skin and counter-body. The contact mechanics of tactile friction is governed by many factors such as the state and properties of skin and counter-body. In order to discover the connection between perception and tactile friction on textured stainless steel sheets, both perception experiments (subjective) and tactile friction measurements (objective) were performed in this research. The perception experiments were carried out by using a panel test method to identify the perceived roughness, perceived stickiness and comfort level from the participants. For the friction experiments, tactile friction was measured by a multi-axis force/torque transducer in vivo. The perceived stickiness was illustrated as an effective subjective stimulus, which has a negative correlation to the comfort perception. No significant evidence was revealed to the connection between the perceived roughness and comfort perception, and this relationship may be influenced by the participants’ individual experience, gender and moisture level of skin. Furthermore, the kinetic tactile friction was concluded as an objective stimulus to the comfort perception with a negative correlation.

关键词： tactile friction perception pleasant touch biotribology

Limited long-distance dispersal success in a Western european fairy shrimp evidenced by nuclear and mitochondrial lineage structuring

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Current Zoology 2020年第3期66卷 227-237页

作者： Paula C.rodriguez-FLOReS ernesto ReCUeRO Yolanda JIMeNeZ-RUIZ mario garcIA-PARIS Museo Nacional de Ciencias Naturales(MNCN-CSIC) Jose Gutierrez Abascal2Madrid 28006Spain Centre d'estudis Avanqats de Blanes(CeAB-CSIC) C.d'Acces Cala Sant Francesc 14Blanes 17300Spain

Anostraca are known by their ability for long-distance dispersal,but the existence in several species of deep,geographically structured mtDNA lineages suggests their populations are subjected to allopatric differentiation,isolation,and prevalence of local scale dispersion.Tanymastix stagnalis is one of the most widespread species of Anostraca and previous studies revealed an unclear geographical pattern of mtDNA genetic diversity.Here,we analyze populations from the Iberian and Italian Peninsulas,Central europe,and Scandinavia,with the aim to characterize the patterns of genetic diversity in a spatio-temporal framework using mtDNA and nuclear markers to test gene flow among close populations.For these aims we built a time-calibrated phylogeny and carried out Bayesian phylogeographic analyses using a continuous diffusion model.Our results indicated that T.stagnalis presents a deeply structured genetic diversity,including 7 ancient lineages,some of them even predating the Pleistocene.The Iberian Peninsula harbors high diversity of lineages,with strong isolation and recent absence of gene flow between populations.Dispersal at local scale seems to be the prevailing dispersal mode of T.stagnalis,which exhibits a pattern of isolation-bydistance in the Iberian Peninsula.We remark the vulnerability of most of these lineages,given the limited known geographic distribution of some of them,and the high risk of losing important evolutionary potential for the species.

关键词： allopatric fragmentation Anostraca Crustacea nuclear markers Pleistocene phylogeography

Long-term treatment with PP2 after spinal cord injury resulted in functional locomotor recovery and increased spared tissue

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Neural Regeneration Research 2014年第24期9卷 2164-2173页

作者： Odrick R.Rosas Aranza I.Torrado Jose M.Santiago Ana e.rodriguez Iris K.Salgado Jorge D.Miranda Department of Physiology School of Medicine University of Puerto Rico Medical Sciences Campus Department of Natural Sciences University of Puerto Rico Carolina Campus

The spinal cord has the ability to regenerate but the microenvironment generated after trauma reduces that capacity. An increase in Src family kinase （SFK） activity has been implicated in neuropathological conditions associated with central nervous system trauma. Therefore, we hypothesized that a decrease in SFK activation by a long-term treatment with 4-amino-5-（4- chlorophenyl）-7-（t-butyl）pyrazolo[3,4-d]pyramidine （PP2）, a selective SFK inhibitor, after spinal cord contusion with the New York University （NYU） impactor device would generate a permissive environment that improves axonal sprouting and/or behavioral activity. Results demonstrated that long-term blockade of SFK activation with PP2 increases locomotor activity at 7, 14, 21 and 28 days post-iniury in the Basso, Beattie, and Bresnahan open field test, round and square beam crossing tests. In addition, an increase in white matter spared tissue and serotonin fiber density was observed in animals treated with PP2. However, blockade of SFK activity did not change the astrocytic response or infiltration of cells from the immune system at 28 days post-injury. Moreover, a reduced SFK activity with PP2 diminished ephexin （a guanine nudeotide exchange factor） phosphorylation in the acute phase （4 days post-injury） after trauma. Together, these findings suggest a potential role of SFK in the regulation of spared tissue and/or axonal outgrowth that may result in functional locomotor recovery during the pathophysiology generated after spinal cord injury. Our study also points out that ephexinl phosphorylation （activation） by SFK action may be involved in the repulsive microenvironment generated after spinal cord injury.

关键词： nerve regeneration trauma regeneration Src family kinase eph receptors ephexin spared tissue locomotor recovery GFAP eD1 serotonin fibers neural regeneration

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Analyses of head and thorax in eupomphini(Meloidae)suggest that complex behaviors are not associated to changes in general shape

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Integrative Zoology 2023年第5期18卷 949-957页

作者： mario GONZÁLeZ-FeRReIRO mario garcÍA-PARÍS Lucía SAINZ-eSCUDeRO e.Karen LÓPeZ-eSTRADA Museo Nacional de Ciencias Naturales(MNCN-CSIC) MadridSpain Real Jardín Botánico(RJB-CSIC) MadridSpain

INTRODUCTION evolution of behavioral responses is often dependent on the existence of modified structures that enable the development of the behavioral suite(Kay 1978;Lundrigan 1996;Alfaro et al.2004;Goyens et al.2015;Higham et al.2015;Sharp et al.2018;Schendel et al.2019).Occasionally,structural modifications are so important that a direct link between morphology and behavior can be inferred(Fleagle 1977;Rodman 1979;Losos 1990a;Higham et al.2015).

关键词： enable structural behaviors

Selection of micro-fabrication techniques on stainless steel sheet for skin friction

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Friction 2016年第2期4卷 89-104页

作者： S.ZHANG X.ZeNG D.T.A.MATTHeWS A.IGARTUA e.rodriguez-VIDAL J.CONTReRAS FORTeS V.SAeNZ De VITeRI Laboratory for Surface Technology and Tribology Faculty of Engineering Technology University of Twente Drienerlolaan 5 Enschede 7522 NB the Netherlands Laboratory for Surface Technology and Tribology Faculty of Engineering Technology University of Twente Drienerlolaan 5 Enschede 7522 NB the NetherlandsShanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 China Tata Steel Research & Development Ijmuiden 1970 CA the Netherlands IK4-Tekniker C/Ignacio Goenaga 5 Eibar 20600 Spain Acerinox europa SAU Los Barrios Spain

This review gives a concise introduction to the state-of-art techniques used for surface texturing, e.g., wet etching, plasma etching, laser surface texturing (LST), 3D printing, etc. In order to fabricate deterministic textures with the desired geometric structures and scales, the innovative texturing technologies are developed and extended. Such texturing technology is an emerging frontier with revolutionary impact in industrial and scientific fields. With the help of the latest fabrication technologies, surface textures are scaling down and more complex deterministic patterns may be fabricated with desired functions, e.g., lotus effect (hydrophobic), gecko feet (adhesive), haptic tactile, etc. The objective of this review is to explore the surface texturing technology and its contributions to the applications.

关键词： microfabrication surface texturing

Glycosylation on proteins of the intestine and perimicrovillar membrane of Triatoma (Meccus) pallidipennis, under different feeding conditions

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Insect Science 2019年第5期26卷 796-808页

作者： Ana e.Gutierrez-Cabrera Wesley F.Zandberg edgar Zenteno mario H.rodriguez Bertha espinoza Carl Lowenberger CONACyT-Centro de Investigacion Sobre enfermedades Infecciosas Instituto Nacional de Salud PublicaCuernavacaMorelosMexico Department of Chemistry Simon Fraser UniversityBurnabyBCCanada Department of Chemistry The University of British Columbia OkanaganKelownaBCCanada Facultad de Medicina Departamento de BioquimicaUniversidad Nacional Autdmoma de Mexico Mexico CityDFMexico Centro de Investigacion Sobre enfermedades Infecciosas Instituto Nacional de Salud PublicaCuernavaca MorelosMexico Departamento de Inmunologia Instituto de Investigaciones BiomedicasUniversidad Nacional Autonoma de Mexico Ciudad UniversitariaMexico CityDFMexico Department of Biological Sciences Simon Fraser UniversityBurnabyBCCanada

Trypanosoma cruzi,the causative agent of Chagas disease, interacts with molecules in the midgut of its insect vector to multiply and reach the infective stage. Many studies suggest that the parasite binds to midgut-specific glycans. We identified several glycoproteins expressed in the intestine and perimicrovillar membrane (PMM) of Triatoma (Meccus) pallidipennis under different feeding conditions. In order to assess changes in protein-linked glycans, we performed lectin and immunoblot analyses on glycoprotein extracts from these intestinal tissues using well-characterized lectins, and an antibody, which collectively recognize a wide range of different glycans epitopes. We observed that the amount and composition of proteins and glycoproteins associated with different glycans structures changed over time in the intestines and PMM under different physiological conditions. PMM extracts contained a wide variety of glycoproteins with different sugar residues, including abundant high-mannose and complex sialylated glycans. We propose that these molecules could be involved in the process of parasite-vector interactions.

关键词： feeding conditions glycoproteins lectins perimicrovillar membrane triatomine vector-parasite interactions

A System Identification-based Modeling Framework of Bidirectional DC-DC Converters for Power Grids

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Journal of Modern Power Systems and Clean energy 2022年第3期10卷 788-799页

作者： Gabriel e.Mejia-Ruiz mario R.A.Paternina Juan R.rodriguez R. Juan M.Ramirez Alejandro Zamora-Mendez Guillermo Bolivar-O. Department of electrical engineering National Autonomous University of Mexico(UNAM)Mexico CityMexico Department of electrical engineering Center for Research and Advanced Studies(CINVESTAV)GuadalajaraMexico electrical engineering Faculty Michoacan University of Saint Nicholas of Hidalgo(UMSNH)MoreliaMexico engineering Faculty Corporacion Universitaria Minuto de Dios-UNIMINUTOBelloColombia

This paper proposes a system identification framework based on eigensystem realization to accurately model power electronic converters.The proposed framework affords an energy-based optimal reduction method to precisely identify the dynamics of power electronic converters from simulated or actual raw data measured at the converter’s ports.This method does not require any prior knowledge of the topology or internal parameters of the converter to derive the system modal information.The accuracy and feasibility of the proposed method are exhaustively evaluated via simulations and practical tests on a software-simulated and hardware-implemented dual active bridge(DAB)converter under steady-state and transient conditions.After various comparisons with the Fourier series-based generalized average model,switching model,and experimental measurements,the proposed method attains a root mean square error(RMSe)of less than 1%with respect to the actual raw data.Moreover,the computational effort is reduced to 1/8.6 of the Fourier series-based model.

关键词： Dual active bridge eigensystem realization algorithm generalized average model power electronic converter identification

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evaluation of different machine learning methods for land cover mapping of a Mediterranean area using multi-seasonal Landsat images and Digital Terrain Models

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International Journal of Digital earth 2014年第6期7卷 492-509页

作者： Victor F.rodriguez-Galiano mario Chica-Rivas Departamento de Geodinamica Universidad de GranadaGranadaSpain Departamento de Analisis Matematico Universidad de GranadaGranadaSpain

Land cover monitoring using digital earth data requires robust classification methods that allow the accurate mapping of complex land cover categories.This paper discusses the crucial issues related to the application of different up-to-date machine learning classifiers:classification trees(CT),artificial neural networks(ANN),support vector machines(SVM)and random forest(RF).The analysis of the statistical significance of the differences between the performance of these algorithms,as well as sensitivity to data set size reduction and noise were also analysed.Landsat-5 Thematic Mapper data captured in european spring and summer were used with auxiliary variables derived from a digital terrain model to classify 14 different land cover categories in south Spain.Overall,statistically similar accuracies of over 91%were obtained for ANN,SVM and RF.However,the findings of this study show differences in the accuracy of the classifiers,being RF the most accurate classifier with a very simple parameterization.SVM,followed by RF,was the most robust classifier to noise and data reduction.Significant differences in their performances were only reached for thresholds of noise and data reduction greater than 20%(noise,SVM)and 25%(noise,RF),and 80%(reduction,SVM)and 50%(reduction,RF),respectively.

关键词： land cover remote sensing classification trees random forest neural networks support vector machines