Electroactive nanofluids with high solid loading and low viscosity for rechargeable redox flow batteries
| العنوان: | Electroactive nanofluids with high solid loading and low viscosity for rechargeable redox flow batteries |
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| المؤلفون: | Elena V. Timofeeva, Chun-Man Chow, Carlo U. Segre, Elahe Moazzen, Sujat Sen |
| المصدر: | Journal of Applied Electrochemistry. 47:593-605 |
| بيانات النشر: | Springer Science and Business Media LLC, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Materials science, General Chemical Engineering, Inorganic chemistry, Iron oxide, Nanoparticle, 02 engineering and technology, Electrolyte, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Flow battery, 0104 chemical sciences, Surface coating, chemistry.chemical_compound, Nanofluid, chemistry, Materials Chemistry, Electrochemistry, 0210 nano-technology, Dispersion (chemistry), Dissolution |
| الوصف: | A typical dispersion of iron oxide nanoparticles in alkali electrolyte is limited to 20 wt% solids, above which it has a paste-like consistency (>370 cP), incompatible with flow applications. The formulation of stable electrochemically active colloids of nanoscale iron oxide (30–50 nm) with up to 70 wt% solids, low viscosity ( 2 weeks at rest), and 55% enhancement in thermal conductivity is reported herein. A thin surface coating allows for good particle dispersion, which is shown to be crucial for these enhanced features. These suspensions of electrochemically active nanoparticles (nanoelectrofuels) can undergo electrochemical charge and discharge in fluidized format through particle–electrode impact events with potential for application in redox flow batteries. The surface coating is found to partially suppress electrochemical access to the nanoparticle in a fluidized format but has no detrimental effects on discharge capacity in the solid state. This approach is also shown to suppress a parasitic nanoparticle agglomeration process, which is otherwise dominant during electrochemical cycling of pristine iron oxide. A dissolution re-precipitation mechanism is proposed to offer insight into this auxiliary benefit. This study provides the first insight into the feasibility of adopting electrochemically active nanofluids as high energy density redox flow battery electrolytes. |
| تدمد: | 1572-8838 0021-891X |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::d7badbbe29706ee1cdfb72b86ad87645 https://doi.org/10.1007/s10800-017-1063-4 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........d7badbbe29706ee1cdfb72b86ad87645 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15728838 0021891X |
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