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  1. Article ; Online: Ionic Covalent Organic Frameworks-Derived Cobalt Single Atoms and Nanoparticles for Efficient Oxygen Electrocatalysis.

    Guo, Jiaming / Li, Wenqiong / Xu, Yuncun / Mao, Yanqi / Mei, Zhiwei / Li, Haihan / He, Yun / San, Xingyuan / Xu, Kui / Liang, Xiaoguang

    Small methods

    2022  Volume 7, Issue 2, Page(s) e2201371

    Abstract: Metal single atoms show outstanding electrocatalytic activity owing to the abundant atomic reactive sites and superior stability. However, the preparation of single atoms suffers from inexorable metal aggregation which is harmful to electrocatalytic ... ...

    Abstract Metal single atoms show outstanding electrocatalytic activity owing to the abundant atomic reactive sites and superior stability. However, the preparation of single atoms suffers from inexorable metal aggregation which is harmful to electrocatalytic activity. Here, ionic covalent organic frameworks (iCOFs) are employed as the sacrificial precursor to mitigate the metal aggregation and subsequent formation of bulky particles. Molecular dynamics simulation shows that iCOFs can trap and confine more Co ions as compared to neutral COFs, resulting in the formation of a catalyst composed of Co single atoms and uniformly distributed Co nanoparticles (Co
    Language English
    Publishing date 2022-12-30
    Publishing country Germany
    Document type Journal Article
    ISSN 2366-9608
    ISSN (online) 2366-9608
    DOI 10.1002/smtd.202201371
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Regulation of Released Alkali from Gel Polymer Electrolyte in Quasi-Solid State Zn-Air Battery.

    Li, Haihan / Guo, Jiaming / Mao, Yanqi / Wang, Guanbo / Liu, Jinlan / Xu, Yuncun / Wu, Zhiwei / Mei, Zhiwei / Li, Wenqiong / He, Yun / Liang, Xiaoguang

    Small (Weinheim an der Bergstrasse, Germany)

    2023  Volume 19, Issue 10, Page(s) e2206814

    Abstract: Gel polymer electrolyte (GPE) in quasi-solid state Zn-air battery (QSZAB) will release alkali during cycling, resulting in gradual dehydration of GPE, corrosion of Zn electrode, Zn dendrites growth, and therefore inferior performance. Here, hollow Sn ... ...

    Abstract Gel polymer electrolyte (GPE) in quasi-solid state Zn-air battery (QSZAB) will release alkali during cycling, resulting in gradual dehydration of GPE, corrosion of Zn electrode, Zn dendrites growth, and therefore inferior performance. Here, hollow Sn microspheres are prepared on Zn substrate by the technique of colloidal self-assembly. The inner surfaces of hollow Sn microspheres are modified by 2-hydroxypropyl-β-cyclodextrin (hollow Sn-inner HPβCD) to regulate the released alkali at GPE|anode interface. The hollow Sn-inner HPβCD can lessen the leakage of released alkali, make stored alkali diffuse back to GPE during the charging process, and mitigate the loss of soluble Zn(OH)
    Language English
    Publishing date 2023-01-15
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2168935-0
    ISSN 1613-6829 ; 1613-6810
    ISSN (online) 1613-6829
    ISSN 1613-6810
    DOI 10.1002/smll.202206814
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Nanofiber Composite for Improved Water Retention and Dendrites Suppression in Flexible Zinc-Air Batteries.

    Chen, Zhaoyang / Yang, Xing / Li, Wenqiong / Liang, Xiaoguang / Guo, Jiaming / Li, Haihan / He, Yun / Kim, Yoonseob

    Small (Weinheim an der Bergstrasse, Germany)

    2021  Volume 17, Issue 39, Page(s) e2103048

    Abstract: Water loss of the gel polymer electrolytes (GPEs) and dendrites growth on Zn anode are overriding obstacles to applying flexible zinc-air batteries (ZABs) for wearable electronic devices. Nearly all previous efforts aim at developing novel GPEs with ... ...

    Abstract Water loss of the gel polymer electrolytes (GPEs) and dendrites growth on Zn anode are overriding obstacles to applying flexible zinc-air batteries (ZABs) for wearable electronic devices. Nearly all previous efforts aim at developing novel GPEs with enhanced water retention and therefore elongate their lifespan. Herein, a facile interface engineering strategy is proposed to retard the water loss of GPE from the half-open structured air cathode. In detail, the poly(ethylene vinyl acetate)/carbon powder (PEVA-C) nanofiber composite interface layer with features of hydrophobicity, high conductivity, air permeability, and flexibility are prepared on the carbon cloth and set up between the GPE and electrode. The as-assembled ZAB with simple alkaline PVA GPE exhibits an impressive cycle life of 230 h, which outperforms ZAB without the PEVA-C nanofibers interface layer by 14 times. Additionally, the growth of Zn dendrites can be suppressed due to the tardy water loss of GPE.
    MeSH term(s) Dendrites ; Electric Power Supplies ; Nanofibers ; Water ; Zinc
    Chemical Substances Water (059QF0KO0R) ; Zinc (J41CSQ7QDS)
    Language English
    Publishing date 2021-08-24
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2168935-0
    ISSN 1613-6829 ; 1613-6810
    ISSN (online) 1613-6829
    ISSN 1613-6810
    DOI 10.1002/smll.202103048
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Experimental study of bentonite–soil mixtures as anti-seepage materials of constructed wetlands

    Chen, Jing / Li, Zifu / Zhao, Xin / Li, Haihan

    Journal of environmental science and health. Part A. Toxic/ hazardous substances and environmental engineering. 2011 June 1, v. 46, no. 7

    2011  

    Abstract: In this study, mixtures of different kinds of bentonite and soil were used and tested in order to find a cheap alternative to current anti-seepage materials for constructed wetlands. The anti-seepage layer of constructed wetlands was simulated in the ... ...

    Abstract In this study, mixtures of different kinds of bentonite and soil were used and tested in order to find a cheap alternative to current anti-seepage materials for constructed wetlands. The anti-seepage layer of constructed wetlands was simulated in the experimental study and the permeability coefficient of the mixed materials was determined in order to evaluate the anti-seepage effect of mixtures. The main results are as follows: (i) The minimum mass ratio of bentonite to soil is 10%; (ii) Within a certain range, the more compact and higher the wet density is, then the better anti-seepage effect is (under the condition of certain moisture content). The permeability coefficient of the mixed materials exponentially increased with the increase of wet density; (iii) At the wet density of 1.83 g/cm³, corresponding with the optimum compactness, the mixture of natural sodium bentonite produced in Wyoming, USA and soil from Cangzhou, Hebei province showed the best anti-seepage performance; (iv) The impermeability of the mixture with smaller particle sizes of bentonite was far better than that with the bigger particle sizes; (v) The hydration effect of bentonite changed the structure of the mixture materials into a special structure that is similar to that of pure bentonite. The particles of the mixture became expanded under SEM investigation and the mixture became more compact, which could have the same or similar effect as pure bentonite for anti-seepage.
    Keywords bentonite ; constructed wetlands ; permeability ; sodium ; soil ; water content ; China ; Wyoming
    Language English
    Dates of publication 2011-0601
    Size p. 729-735.
    Publishing place Taylor & Francis Group
    Document type Article
    ZDB-ID 196584-0
    ISSN 1532-4117 ; 0360-1226 ; 1077-1204 ; 1093-4529
    ISSN (online) 1532-4117
    ISSN 0360-1226 ; 1077-1204 ; 1093-4529
    DOI 10.1080/10934529.2011.571585
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Experimental study of bentonite-soil mixtures as anti-seepage materials of constructed wetlands.

    Chen, Jing / Li, Zifu / Zhao, Xin / Li, Haihan

    Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering

    2011  Volume 46, Issue 7, Page(s) 729–735

    Abstract: In this study, mixtures of different kinds of bentonite and soil were used and tested in order to find a cheap alternative to current anti-seepage materials for constructed wetlands. The anti-seepage layer of constructed wetlands was simulated in the ... ...

    Abstract In this study, mixtures of different kinds of bentonite and soil were used and tested in order to find a cheap alternative to current anti-seepage materials for constructed wetlands. The anti-seepage layer of constructed wetlands was simulated in the experimental study and the permeability coefficient of the mixed materials was determined in order to evaluate the anti-seepage effect of mixtures. The main results are as follows: (i) The minimum mass ratio of bentonite to soil is 10%; (ii) Within a certain range, the more compact and higher the wet density is, then the better anti-seepage effect is (under the condition of certain moisture content). The permeability coefficient of the mixed materials exponentially increased with the increase of wet density; (iii) At the wet density of 1.83 g/cm(3), corresponding with the optimum compactness, the mixture of natural sodium bentonite produced in Wyoming, USA and soil from Cangzhou, Hebei province showed the best anti-seepage performance; (iv) The impermeability of the mixture with smaller particle sizes of bentonite was far better than that with the bigger particle sizes; (v) The hydration effect of bentonite changed the structure of the mixture materials into a special structure that is similar to that of pure bentonite. The particles of the mixture became expanded under SEM investigation and the mixture became more compact, which could have the same or similar effect as pure bentonite for anti-seepage.
    MeSH term(s) Adsorption ; Bentonite/chemistry ; Environmental Restoration and Remediation/instrumentation ; Environmental Restoration and Remediation/methods ; Kinetics ; Particle Size ; Permeability ; Soil/chemistry ; Waste Disposal, Fluid/instrumentation ; Waste Disposal, Fluid/methods ; Water Pollutants, Chemical/analysis ; Water Pollutants, Chemical/chemistry ; Wetlands
    Chemical Substances Soil ; Water Pollutants, Chemical ; Bentonite (1302-78-9)
    Language English
    Publishing date 2011
    Publishing country England
    Document type Journal Article
    ZDB-ID 196584-0
    ISSN 1532-4117 ; 0360-1226 ; 1077-1204 ; 1093-4529
    ISSN (online) 1532-4117
    ISSN 0360-1226 ; 1077-1204 ; 1093-4529
    DOI 10.1080/10934529.2011.571585
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Zs.B 1217: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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