Electrochemical Stability and Reversibility of Aqueous Polysulfide Electrodes Cycled Beyond the Solubility Limit
| العنوان: | Electrochemical Stability and Reversibility of Aqueous Polysulfide Electrodes Cycled Beyond the Solubility Limit |
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| المؤلفون: | Menghsuan Sam Pan, Liang Su, Stephanie L. Eiler, Linda W. Jing, Andres F. Badel, Zheng Li, Fikile R. Brushett, Yet-Ming Chiang |
| المصدر: | Journal of The Electrochemical Society. 169:060524 |
| بيانات النشر: | The Electrochemical Society, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | sulfide solutions, optical-spectra, batteries, constant, kinetics, Renewable Energy, Sustainability and the Environment, ions, Materials Chemistry, Electrochemistry, energy-storage, Condensed Matter Physics, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials |
| الوصف: | Batteries which use dissolved redox-active species, such as redox flow batteries (RFBs), are often considered to be constrained in their operation and energy density by the solubility limit of the redox species. Here, we show that soluble redox active electrolytes can be reversibly cycled deeply into the precipitation regime, permitting higher effective concentrations, energy densities, and lower costs. Using aqueous sodium polysulfide negative electrolytes cycled in the nominal Na2S2 to Na2S4 capacity range as an example, we show that the effective solubility can be increased from 5 M in the fully-dissolved state to as much as 10 M using the precipitation strategy. Stable cycling was observed at 8 M concentration over more than 1600h at room temperature. We also analyze the range of polysulfide electrochemical stability, and characterize the precipitate composition. This enhanced effective concentration approach may be generalized to other redox chemistries that utilize solubilized reactants, and may be especially useful for long-duration storage applications where slow charge-discharge rates allow equilibration of precipitated species with the redox-active solution. Joint Center for Energy Storage Research, an Energy Innovation Hub - U.S. Department of Energy, Office of Science, Basic Energy Sciences; National Science Foundation [DMR-1419807] Published version This work was supported as part of the Joint Center for Energy Storage Research, an Energy Innovation Hub funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences. This work made use of the MRSEC Shared Experimental Facilities at MIT, supported by the National Science Foundation under award number DMR-1419807. |
| وصف الملف: | application/pdf |
| تدمد: | 1945-7111 0013-4651 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc21af02ac0b9d8b525cbc8adb230a17 https://doi.org/10.1149/1945-7111/ac7669 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....bc21af02ac0b9d8b525cbc8adb230a17 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19457111 00134651 |
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