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Results for “Flow battery”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 325 records · Page 18

All sources NASA NTRS DOE OSTI

DOE OSTI2023

Modular dimerization of organic radicals for stable and dense flow battery catholyte

Not provided.

Energy & Fuels↗

DOE OSTI2020

Hydrophilic microporous membranes for selective ion separation and flow-battery energy storage

Abstract not provided

Tan, Rui↗

DOE OSTI2021

Dual function organic active materials for nonaqueous redox flow batteries

X-ray crystal structures of a phenothiazine posolyte and viologen negolyte and cyclic voltammograms of a solution containing both compounds.

Attanayake, N. Harsha↗

DOE OSTI2021

Designing high energy density flow batteries by tuning active-material thermodynamics

With the cost of renewable energy near parity with fossil fuels, energy storage is paramount. We report a breakthrough on a bioinspired NRFB active-material, with greatly improved solubility, and place it in a predictive theoretical framework.

25 ENERGY STORAGE↗

DOE OSTI2023

Beyond energy density: flow battery design driven by safety and location

Using satellite imagery we show that the installation footprint of grid-scale lithium-ion batteries is often comparable to much less energy-dense technologies such as aqueous battery systems.

Reber, David↗

DOE OSTI2025

Investigation of electrode passivation during oxidation of a nitroxide radical relevant for flow battery applications

Nitroxide-radicals such as 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) and their derivatives have gained interest as redox-active organic molecules for applications in grid-scale energy storage. In particular, the higher solubility of 4-hydroxy-TEMPO in aqueous media greatly improves its energy density, but unusual kinetics associated with its surface-mediated electrooxidation have limited further development. Here, the apparent passivation behavior of species formed during 4-hydroxy-TEMPO electrooxidation in concentrated electrolytes is investigated. A combination of surface microscopy, X-ray photoelectron spectroscopy, and quartz-crystal gravimetry confirms the formation of a polymeric-type layer over the electrode surface composed of 4-hydroxy-TEMPO-like subunits, which is otherwise not observed with TEMPO. This study indicates that the design of high energy density and stable TEMPO-based redox molecules must also consider the reactivity that may occur due to the molecular characteristics of solubility-enhancing moieties. It is found that the extent of passivation is dependent on the voltage scan rate and 4-hydroxy-TEMPO concentration, underscoring the importance of studying materials at conditions relevant for their proposed applications. Evidence of incomplete passivation and an electrode self-cleaning process is presented, suggesting a materials design strategy to mitigate surface passivation from side reactions that may occur in redox active materials for energy storage applications.

Buchanan, Cailin [Argonne National Laboratory (ANL↗

DOE OSTI2020