A 1.51 V pH neutral redox flow battery towards scalable energy storage
| Autor: | Wenda Wu, Bo Hu, Jian Luo, Maowei Hu, Camden DeBruler, T. Leo Liu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Ammonium bromide
Aqueous solution Renewable Energy Sustainability and the Environment Inorganic chemistry Viologen 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Electrochemistry 7. Clean energy Redox Flow battery Energy storage chemistry.chemical_compound chemistry medicine General Materials Science 0210 nano-technology Power density medicine.drug |
| Zdroj: | Journal of Materials Chemistry A. 7:9130-9136 |
| ISSN: | 2050-7496 2050-7488 |
| Popis: | Aqueous redox flow batteries using low-cost organic and inorganic active materials have received growing interest for sustainable energy storage. In this study, a low-cost, high redox potential (1.08 V vs. NHE) and high capacity ammonium bromide (NH4Br, 214.4 A h L−1) catholyte was coupled with an organic viologen anolyte to demonstrate 1.51 V high voltage (SPr)2V/Br− aqueous redox flow batteries under pH neutral conditions for the first time. Benefitting from the high water solubility of both the NH4Br catholyte and (SPr)2V anolyte, the newly designed (SPr)2V/Br− organic flow battery was operated at up to 1.5 M and an energy density of up to 30.4 W h L−1. Using multiwall carbon nanotubes as an electrochemical additive for the Br3−/Br− redox couple, the highly energy dense (SPr)2V/Br− flow battery manifested outstanding current performance, up to 78% energy efficiency at 40 mA cm−2 current density and 227 mW cm−2 power density, the highest power density known for pH neutral organic flow batteries. |
| Databáze: | OpenAIRE |
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