申请人:The Board of Trustees of the University of Illinois
公开号:US20160208030A1
公开(公告)日:2016-07-21
The invention provides a redox flow battery comprising a microporous or nanoporous size-exclusion membrane, wherein one cell of the battery contains a redox-active polymer dissolved in the non-aqueous solvent or a redox-active colloidal particle dispersed in the non-aqueous solvent. The redox flow battery provides enhanced ionic conductivity across the electrolyte separator and reduced redox-active species crossover, thereby improving the performance and enabling widespread utilization. Redox active poly(vinylbenzyl ethylviologen) (RAPs) and redox active colloidal particles (RACs) were prepared and were found to be highly effective redox species. Controlled potential bulk electrolysis indicates that 94-99% of the nominal charge on different RAPs is accessible and the electrolysis products are stable upon cycling. The high concentration attainable (>2.0 M) for RAPs in common non-aqueous battery solvents, their electrochemical and chemical reversibility, and their hindered transport across porous separators make them attractive materials for non-aqueous redox flow batteries based on size-selectivity.
该发明提供了一种氧化还原流动电池,其中电池的一个电池单元包含溶解在非水溶剂中的氧化还原活性聚合物或分散在非水溶剂中的氧化还原胶体颗粒的微孔或纳米孔隔离膜。氧化还原流动电池提供了增强的离子导电性,穿越电解质分隔膜的氧化还原活性物种减少,从而提高了性能并实现了广泛的利用。氧化还原活性聚合物(RAPs)和氧化还原活性胶体颗粒(RACs)已经制备,并且被发现是高效的氧化还原物种。控制电位的大量电解表明,不同RAPs上94-99%的名义电荷是可访问的,并且电解产物在循环过程中是稳定的。在常见的非水溶剂中RAPs可达到的高浓度(>2.0 M),它们的电化学和化学可逆性,以及它们在多孔隔离膜中的受阻输运使它们成为基于尺寸选择性的非水溶性氧化还原流动电池的有吸引力的材料。