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المؤلفYoussry M.
المؤلفKamand F.Z.
المؤلفMagzoub M.I.
المؤلفNasser M.S.
تاريخ الإتاحة2020-02-05T08:54:08Z
تاريخ النشر2018
اسم المنشورRSC Advances
المصدرScopus
الرقم المعياري الدولي للكتاب20462069
معرّف المصادر الموحدhttp://dx.doi.org/10.1039/c8ra05446k
معرّف المصادر الموحدhttp://hdl.handle.net/10576/12815
الملخصThe aqueous dispersions of a special type of carbon black (CB) in 1 M lithium bis(trifluoromethanesulfonimide) electrolyte is mainly controlled by the affinity of the aqueous electrolyte towards the CB particles rather than the particle size. In spite of its small particle size (30 nm), this type of CB forms a three-dimensional open network which is rheologically and electrically percolated at a relatively high threshold (2.0 wt%) with enhanced rheological and electrical properties. At this percolating threshold, replacing a trace amount of CB with equivalent carbon nanofibers (CNFs) produces hybrid dispersions with higher electrical conductivity and comparable rheological behavior to pure CB dispersions. This hybrid dispersion is dominated by a cooperatively supporting network, which is wired by the flexible filamentous nanofibers so that it is able to recover the conductivity loss under flow conditions due to flow-induced breaking up of the conductive pathways of CB and presumably sustain a higher load of active materials. This finding suggests hybrid dispersions as a promising precursor in the formulation of electrode suspensions for aqueous semi-solid redox flow cells. 2018 The Royal Society of Chemistry.
راعي المشروعM. Youssry would like thank Cabot Corporation, USA and 3M, France for providing, respectively, the carbon black and lithium salt, and Dr Nasr Bensalah for helping in conducting the impedance spectra. We would like to thank the staff of Central Lab Unit at Qatar University for performing SEM and Raman spectra. This work was partially supported by an internal grant (QUST-CAS-SPR-2017-6) from Qatar University.
اللغةen
الناشرRoyal Society of Chemistry
العنوانAqueous dispersions of carbon black and its hybrid with carbon nanofibers
النوعArticle
الصفحات32119-32131
رقم العدد56
رقم المجلد8
dc.accessType Open Access


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