1,720,962 research outputs found
Soft Batteries: Electrochemical Innovations for Sustainable Energy Storage
No full textResearch into soft energy storage materials is progressing rapidly with several applications in
healthcare and soft robotics. This chapter presents novel materials used across battery
components in next-generation designs, covering innovations in electrodes, electrolytes, and
separators, in addition with possible structural designs. It includes a collection of fundamentals
about Li-ion chemistry to clarify essential material selection criteria, alongside recent
developments in soft batteries utilizing alternative chemistries
Methacrylated Wood Flour-Reinforced Gelatin-Based Gel Polymer as Green Electrolytes for Li–O2 Batteries
Full text linkWith its very high theoretical energy density, the Li−O2 battery could be considered a valid candidate for futureadvanced energy storage solutions. However, the challenges hindering the practical application of this technology are many, as forexample electrolyte degradation under the action of superoxide radicals produced upon cycling. In that frame, a gel polymerelectrolyte was developed starting from waste-derived components: gelatin from cold water fish skin, waste from the fishing industry,and wood flour waste from the wood industry. Both were methacrylated and then easily cross-linked through a one-pot ultraviolet(UV)-initiated free radical polymerization, directly in the presence of the liquid electrolyte (0.5 M LiTFSI in DMSO). The woodflour works as cross-linking points, reinforcing the mechanical properties of the obtained gel polymer electrolyte, but it also increasesLi-ion transport properties with an ionic conductivity of 3.3 mS cm−1 and a transference number of 0.65 at room temperature. TheLi−O2 cells assembled with this green gel polymer electrolyte were able to perform 180 cycles at 0.1 mA cm−2, at a fixed capacity of0.2 mAh cm−2, under a constant O2 flow. Cathodes post-mortem analysis confirmed that this electrolyte was able to slow downsolvent degradation, but it also revealed that the higher reversibility of the cells could be explained by the formation of Li2O2 in theamorphous phase for a higher number of cycles compared to a purely gelatin-based electrolyt
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Crosslinked ionogels containing a Li-conducting inorganic phase as electrolyte for lithium-metal batteries
No full textIn the quest for the development of safer lithium-metal batteries (LMBs), the integration of inorganic fillers and ionic liquids into polymer matrices has emerged as a promising strategy to enhance safety, ionic conductivity and battery performance. This study introduces a novel composite ionogel (IG) synthesized through a facile one-pot method, incorporating butyl methacrylate (BMA) and poly(ethylene glycol) diacrylate (PEGDA) with the ionic liquid 1-butyl-1-methylpyrrolidinium bis(fluorosulfonyl)imide (PYR14FSI) and garnet Li6.4La3Zr1.4Ta0.6O12 (LLZTO) nanoparticles. A distinctive feature of the approach is the use of an organosilane functionalization of the LLZTO nanoparticles, which ensures their full integration into the polymer matrix during free-radical polymerization. Moreover, this method effectively eliminates the Li2CO3 passivation layer that typically forms on the surface of the LLZTO nanoparticles, thus, further contributing to an enhanced performance. As a result, a LMB with the functionalized LLZTO IG electrolyte delivered more than 160 mA h g−1 with a very good capacity retention of 97.7% after 400 cycles in Li|IG|LFP cells
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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