High performance of zinc-ferrum redox flow battery with Ac−/HAc buffer solution
| Autor: | Jianchai Chen, Anhong Shi, Bin Yang, Dingjian Cai, Qi Su, Liang Yang, Xiaochun Zhou, Zhipeng Xie, Baixiong Liu |
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| Rok vydání: | 2016 |
| Předmět: |
Ion exchange
Inorganic chemistry Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Buffer solution Zinc Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Flow battery Redox Chemical reaction 0104 chemical sciences Ion chemistry.chemical_compound Fuel Technology chemistry Electrochemistry 0210 nano-technology Energy (miscellaneous) |
| Zdroj: | Journal of Energy Chemistry. 25:495-499 |
| ISSN: | 2095-4956 |
| DOI: | 10.1016/j.jechem.2016.02.009 |
| Popis: | A green low-cost redox flow battery using Zn/Zn 2+ redox couple in HAc/NaAc medium and Fe 2+ /Fe 3+ redox couple in H 2 SO 4 medium was first proposed and investigated for potential stationary energy storage applications. The presence of HAc/NaAc in the negative electrolyte can keep the pH between 2.0 and 6.0 even when a large amount of H + ions move into negative electrolyte from positive electrolyte through ion exchange membrane. In the pH range of 2.0–6.0, the chemical reaction of Zn species with H + species is very insignificant; furthermore, the electroreduction of H + ion on the negative electrode is significantly suppressed at this pH range. The zinc-ferrum redox flow battery (Zn/Fe RFB) operated within a voltage window of 0.5–2.0 V with a nearly 90% utilization ratio, and its energy efficiency is around 71.1% at room temperature. These results show that Zn/Fe RFB is a promising option as a stationary energy storage equipment. |
| Databáze: | OpenAIRE |
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