Redox-active ionic liquids in redox-flow-batteries

氧化还原液流电池中的氧化还原活性离子液体

• 批准号: 392851120
• 负责人: Professor Dr. Andrea Balducci
• 金额: --
• 依托单位: Institut für Organische Chemie und Makromolekulare Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/392851120?language=en
• 关键词: Redox; active; ionic; liquids; redox

Redox flow batteries (RFBs) are interesting candidates for stationary energy storage. Their capacity and power can be scaled independently by adjusting the size of the storage tank and the cell stack, respectively. In contrast to classical batteries, redox flow batteries (RFBs) are based on active materials, which are dissolved (suspended) in a liquid electrolyte. Consequently, the achievable energy densities are limited due to the presence of a non-active solvent (often water). The most investigated RFB is the all vanadium RFB, which utilizes vanadium ions dissolved in sulfuric acid. In recent years, the interest in organic (polymeric) active materials is steadily growing. This joined proposal aims to develop redox-active ionic liquids (IL) as new materials for the electrolytes of RFBs. All molecules present in the electrolyte will therefore be redox-active. Additionally, the limited voltage window of aqueous electrolytes will be extended. Consequently, higher energy densities will be achievable.The project will be investigated by the two partners at the Friedrich Schiller University Jena (Institute for Technical Chemistry and Environmental Chemistry as well as Institute for Organic Chemistry and Macromolecular Chemistry). Latter partner will contribute to the synthesis and structural characterization of novel redox-active ionic liquids. These ILs will comprise redox-active moieties and ionic groups. The properties will be tuned by the respective structure of the IL. Furthermore IOMC will perform the tests of the synthesized materials in test RFB cells. The ITUC will contribute to the extensive characterization of the synthesized materials. In particular the electrochemical as well as thermal properties will be of interest.

氧化还原液流电池(RFB)是固定储能的有趣候选者。它们的容量和功率可以通过分别调整储罐和电池组的大小来独立调整。与传统电池不同的是，氧化还原液流电池(RFB)是基于活性物质，这些活性物质溶解(悬浮)在液体电解液中。因此，由于非活性溶剂(通常是水)的存在，可实现的能量密度是有限的。研究最多的是全钒RFB，它利用了溶解在硫酸中的钒离子。近年来，人们对有机(聚合物)活性材料的兴趣稳步增长。这项联合提案旨在开发氧化还原活性离子液体(IL)作为RFBS电解液的新材料。因此，存在于电解液中的所有分子都具有氧化还原活性。此外，还将延长电解液的极限电压窗口。因此，将实现更高的能量密度。该项目将由弗里德里希·席勒大学耶拿(技术化学和环境化学研究所以及有机化学和高分子化学研究所)的两个伙伴进行调查。后者将为新型氧化还原活性离子液体的合成和结构表征做出贡献。这些离子液体将包括氧化还原活性部分和离子基团。这些属性将根据IL的相应结构进行调整。此外，IOMC将在测试RFB单元中对合成材料进行测试。ITUC将为合成材料的广泛表征做出贡献。特别是，电化学性质和热学性质将是人们感兴趣的。