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Energy storage devices (ESDs) need designing and development of high electrochemical performance and promising electrode materials. Transition-metal chalcogenides (TMCs) are being actively investigated as the electrode for electrochemical ESDs. Herein, we report the design, synthesis, and electrochemical properties of the MnSe electrode by a facile hydrothermal method. The as-synthesized MnSe electrode has a flower-like morphology with the planes growing perpendicular to its center. The results of electrochemical performance testing indicate that the pseudocapacitive nature of the MnSe electrode has a critical effect on those properties. The MnSe electrode exhibits a specific capacitance of 423.1 F g−1 at a current density of 1 A g−1 and better cyclic stability among 3000 cycles. The synthesis of MnSe electrodes opens up opportunities for the design of TMCs electrode materials and the development of supercapacitors. [ABSTRACT FROM AUTHOR]

The search for Earth-abundant and efficient electrode materials is significant for advanced supercapacitors. Here we introduce a facile strategy for one-step synthesis of Ni0.85Se nanowires via a composite alkali salt method. When used as an electrode material in supercapacitors, the as-prepared Ni0.85Se nanowires exhibit a high specific capacitance of 1354 F g−1 at a current density of 1 A g−1, and still retain 671 F g−1 at 30 A g−1. The superior electrochemical performance of the Ni0.85Se electrode can be attributed to the metallic conductivity of nickel selenides and fast electrical transport along the axial direction due to the nanowire morphology. For practical applications, an asymmetric supercapacitor was assembled by using Ni0.85Se and activated carbon, which delivered a high energy density of 40.7 W h kg−1 at a power density of 800 W kg−1 and 12.1 W h kg−1 at 16 kW kg−1. Moreover, the device retained 92.4% specific capacitance after 20 000 cycles at a high current density of 5 A g−1, showing its promising application prospects. [ABSTRACT FROM AUTHOR]

BackgroundThe Internet has become an established source of health information for people seeking health information. In recent years, research on the health information seeking behavior of Internet users has become an increasingly important scholarly focus. However, there have been no long-term bibliometric studies to date on Internet health information seeking behavior. ObjectiveThe purpose of this study was to map publication trends and explore research hot spots of Internet health information seeking behavior. MethodsA bibliometric analysis based on PubMed was conducted to investigate the publication trends of research on Internet health information seeking behavior. For the included publications, the annual publication number, the distribution of countries, authors, languages, journals, and annual distribution of highly frequent major MeSH (Medical Subject Headings) terms were determined. Furthermore, co-word biclustering analysis of highly frequent major MeSH terms was utilized to detect the hot spots in this field. ResultsA total of 533 publications were included. The research output was gradually increasing. There were five authors who published four or more articles individually. A total of 271 included publications (50.8%) were written by authors from the United States, and 516 of the 533 articles (96.8%) were published in English. The eight most active journals published 34.1% (182/533) of the publications on this topic. Ten research hot spots were found: (1) behavior of Internet health information seeking about HIV infection or sexually transmitted diseases, (2) Internet health information seeking behavior of students, (3) behavior of Internet health information seeking via mobile phone and its apps, (4) physicians’ utilization of Internet medical resources, (5) utilization of social media by parents, (6) Internet health information seeking behavior of patients with cancer (mainly breast cancer), (7) trust in or satisfaction with Web-based health information by consumers, (8) interaction between Internet utilization and physician-patient communication or relationship, (9) preference and computer literacy of people using search engines or other Web-based systems, and (10) attitude of people (especially adolescents) when seeking health information via the Internet. ConclusionsThe 10 major research hot spots could provide some hints for researchers when launching new projects. The output of research on Internet health information seeking behavior is gradually increasing. Compared to the United States, the relatively small number of publications indexed by PubMed from other developed and developing countries indicates to some extent that the field might be still underdeveloped in many countries. More studies on Internet health information seeking behavior could give some references for health information providers.

The search for Earth-abundant and efficient electrode materials is significant for advanced supercapacitors. Here we introduce a facile strategy for one-step synthesis of Ni0.85Se nanowires via a composite alkali salt method. When used as an electrode material in supercapacitors, the as-prepared Ni0.85Se nanowires exhibit a high specific capacitance of 1354 F g-1 at a current density of 1 A g-1, and still retain 671 F g-1 at 30 A g-1. The superior electrochemical performance of the Ni0.85Se electrode can be attributed to the metallic conductivity of nickel selenides and fast electrical transport along the axial direction due to the nanowire morphology. For practical applications, an asymmetric supercapacitor was assembled by using Ni0.85Se and activated carbon, which delivered a high energy density of 40.7 W h kg-1 at a power density of 800 W kg-1 and 12.1 W h kg-1 at 16 kW kg-1. Moreover, the device retained 92.4% specific capacitance after 20 000 cycles at a high current density of 5 A g-1, showing its promising application prospects.