| 摘要 |
The problem addressed by the invention is that of creating an economical and long-life redox flow cell in the simplest manner possible by using new materials and membranes, which redox flow cell causes little pollution with the redox-active compounds thereof even in the event of possible damage. This problem is solved by a redox flow cell for storing electrical energy containing a reaction cell having two electrode chambers (1, 2) for catholyte and anolyte, which are each connected to at least one liquid store, are separated by a membrane for the ion exchange, and are equipped with electrodes (10, 11), wherein the chambers (1, 2) are each filled with or contain redox-active components, which are present in substance, dissolved, emulsified, or dispersed, as a nano- or micro-gel in an electrolyte solvent, and possibly conducting salts dissolved therein and possibly further additives, wherein the membrane is a size exclusion membrane (3) having a selectivity of at least 400 g/mol, both redox-active components have a molar mass of at least 400 g/mol and contain selected structural units, wherein the potential difference between the redox reactions of the redox-active components proceeding in the anolyte and the catholyte lies between 0 and 4.0 V, with the stipulation that poly(4,4'-bipyridine-co-poly(ethylene glycol)) is excluded as a redox-active component in the anolyte. |
