A Neutral pH Aqueous Organic–Organometallic Redox Flow Battery with Extremely High Capacity Retention
By Eugene S. Beh, Diana Porcellinis, Rebecca Louise Gracia, Kay T Xia, R. Gordon, M. Aziz. 2017
458 citations recorded by the source corpus.
We demonstrate an aqueous organic and organometallic redox flow battery utilizing reactants composed of only earth-abundant elements and operating at neutral pH. The positive electrolyte contains bis((3-trimethylammonio)propyl)ferrocene dichloride, and the negative electrolyte contains bis(3-trimethylammonio)propyl viologen tetrachloride; these are separated by an anion-conducting membrane passing chloride ions. Bis(trimethylammoniopropyl) functionalization leads to ∼2 M solubility for both reactants, suppresses higher-order chemical decomposition pathways, and reduces reactant crossover rates through the membrane. Unprecedented cycling stability was achieved with capacity retention of 99.9943%/cycle and 99.90%/day at a 1.3 M reactant concentration, increasing to 99.9989%/cycle and 99.967%/day at 0.75–1.00 M; these represent the highest capacity retention rates reported to date versus time and versus cycle number. We discuss opportunities for future performance improvement, including chemical modification...
Subfields: Automotive Engineering, Electrical and Electronic Engineering, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/12922fbf5d77dfecf82993ecc1c9a48b40504068
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In Automotive Engineering
In Electrical and Electronic Engineering
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In Renewable Energy, Sustainability and the Environment
Citations in the corpus
- A Water-Miscible Quinone Flow Battery with High Volumetric Capacity and Energy Density (2019, background): “However, these organic molecules tend to have lower solubilities than vanadium species, resulting in considerably lower volumetric capacities for the resulting electrolytes.(15) Although the energy capacity can be scaled up by increasing the volume of electrolyte reservoirs, the size of electrolyte ”
- Accelerating the discovery of materials for clean energy in the era of smart automation (2018, background): “Recent research in the flow-battery community has involved trying to replace the standard vanadium pair of electrolytes with less-expensive electrolytes, but no pair of molecules has been discovered to date that has all the necessary properties 168–173 .”