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Showing 1 to 20 of 23 for “"catholyte"”.
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Novel Catholyte and Electrolyte Optimisation for Aqueous Organic Redox Flow Batteries
… However, there is a lack of viable organic catholytes for RFBs and research thus far has primarily focussed on anolytes. Research in this thesis focuses on novel catholytes, degradation studies and electrolyte optimisation for aqueous organic redox flow batteries (AORFBs), the most …
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The electrolytic reduction of d-glucose (with particular emphasis on acidic catholyte)
Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Chemical Engineering, 1946.
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Elucidating Concentration and Temperature-dependent Energy Limitations of a Novel Fluorinated-organosulfur Catholyte for Li Primary Batteries
… Herein, the novel Li–carbon cell with a liquid catholyte based on the reactant 4-nitrophenylsfur (NO₂-Ph-SF₅) is studied in detail with emphasis on its energy limitations under practical cell conditions. While it has been demonstrated that the novel cell design can surpass the gravimetric energy …
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Electrochemical Flow System for Li-Ion Battery Recycling and Energy Storage
… Next, a promising aqueous manganese catholyte to couple with the sulfur anolyte for a full flow battery is investigated. Test protocols and quantification metrics for the catholyte are developed. The stability of the catholyte, including self-discharge rate and precipitation rate, is …
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Exploring Bioelectrochemical Systems for Removal and Recovery of Hexavalent Chromium or Nutrients
… waste stream and recovered in the recirculated catholyte by the electrical field generated from the waste. The BES was demonstrated to achieve substantial COD removal, nutrients removal and recovery. On average, the removal efficiencies were about 50% for COD, 85% for NH4-N and 40% for PO4-P, …
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Development of semi-solid alkaline flow battery
… suffers from low energy density (~z40 Wh/Lcatholyte), high membrane cost (~$ 500/M 2 and species crossover. One elegant method to overcome all this problems is utilize flowable semisolid electrode. Although there have been several reports in the literature regarding performance of various …
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Electrolytic purification of water
… to separate the electrolyte into anolyte and catholyte. The novel anode was designed to improve clearance of corrosion products by maintaining a fast flow speed in proximity to the zone of anodic corrosion. The Flume model was used in an extensive test at a tannery. Greater than 90% of …
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Energy-efficient Wastewater Treatment by Microbial Fuel Cells: Scaling Up and Optimization
… tubular MFCs, anode effluent is used as catholyte instead of tap water or buffer solutions. Therefore, exposing cathode electrode to atmosphere could be also considered as a passive aeration for further aerobic oxidation of organics and nitrification. Based on several bench-scale studies, …
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Membrane Electrochemical Treatment of Landfill Leachate: Processes, Performance and Challenges
… anolyte for organic oxidation and a high-pH catholyte for ammonia recovery. The MER achieved significantly higher removals of both dissolved organic carbon and UV254nm absorbance than membrane-less electrochemical treatment. The MER was able to remove a large percentage of total nitrogen from …
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Design, analysis and optimization of novel photo electrochemical hydrogen production systems
… and the concentration of electrolyte in the catholyte compartment do not affect the rate of chlorine and hydrogen production. The applied voltage, reactor temperature, and current density have a significant effect on the rate of hydrogen production. The optimal brine concentration is 225 g/L …
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Soluble redox active macromolecular architectures and their electrochemical analysis for energy storage applications
… prototype flow battery testing of these RAPs as catholyte/anolyte pairs are investigated for demonstrating their potential use in enabling next-generation nonaqueous redox flow batteries. Alternative applications for these RAPs are also explored by taking advantage of their redox potentials to …
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Visualization of energy transfer among redox active polymeric colloids via in-situ fluorescence microscopy
… crossover of energy carriers between anolyte and catholyte compartments of the flow battery, as one example, the redox active ethyl viologen agent has been covalently bound within crosslinked polymeric colloids. Little is currently known about how electrons (energy) transfers either within or …
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Development of a hybrid electrokinetic system for the simultaneous removal of heavy metals and PAHs from clayey soil
… At the end of the tests, the soil and catholyte were subjected to physico-chemical analysis. Results showed that the optimal average simultaneous removal was 85% for lead, 84% for nickel, and 74% for phenanthrene. The highest local removals achieved for lead, nickel and phenanthrene …
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Molecular dynamics studies of the structure–dynamics relationship in concentrated nonaqueous electrolytic solutions
… and the other containing phenothiazine organic catholyte preferring softer homo-radical stacking. For the latter, conductivity data show that a faster charge transport is present at high electrolyte concentrations. This difference in behavior becomes less pronounced as the concentration is …
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Tailoring Fluoride/Fluorine Bond Activity for High-Energy Li and Li-ion Batteries
… the –SF₅ group. As a new family of Li primary catholytes, the R-Ph-SF₅ reactants allow for full reactant defluorination and a total of up to 8 e− transfer per molecule, yielding capacities of 861 mAh/g subscript reactant and voltages up to ~2.9 V vs. Li/Li⁺. At a cell level, gravimetric …
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Improving the Cathode Conditions by Pressurizing and Carbon Dioxide Addition to Enhance the Practicality of MFC Treatment of Wastewater
… water process to maintain a stable acidic BES catholyte pH without adding any other buffer. This also increased the anolyte pH, alkalinity, and conductivity, which aided in a superior performance. By including the CO2/bicarbonate buffering, the study coupled BES wastewater treatment with a …
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Water-Soluble Redox Materials and Their Applications in Aqueous Batteries
… (MV) as anolyte and potassium ferrocyanide as catholyte. MV is for the first time explored in the alkaline condition, which shows enhanced electrochemical kinetics compared to in the neutral system. This work demonstrates the potential of MV as the anode material candidate in the alkaline …
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Probing the electrochemical dynamics of soluble redox active polymers
… between anolyte (negative electrolyte) and catholyte (positive electrolyte) compartments. This pervasive crossover leads to deleterious capacity fade and materials underutilization. Redox active polymers (RAPs) are highlighted as soluble nanoscopic energy storing units that enable the simple …
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Tailoring the electrochemical properties of catholytes for solid-state sodium batteries
… properties of solid electrolytes functioning as catholytes in ASSBs and establishes fundamental design principles for achieving high ionic conductivity, interfacial stability, and cathode-level energy density. The first part of this work focuses on polycarbonate-based solid polymer electrolytes …
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Bioremediation of petroleum hydrocarbons using microbial fuel cells
… hydrocarbons (> 90 %) and bromate, used as catholyte, (up to 79 %) with concomitant biogenic electricity generation (i.e. peak power density up to 6.75 mWm-2) were observed. The performance of a tubular MFC system in phenanthrene-contaminated soil was investigated in the last study. The …
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