Redox-active organic molecules are promising charge-storage {materials|supplies|components} for redox-flow batteries (RFBs), but material crossover {between|in between|among|amongst|involving} posolyte/negolyte and chemical degradation are limiting {factors|elements|aspects|variables|components|things} {in the|within the|inside the} {performance|overall performance|efficiency|functionality} of all-organic RFBs. We demonstrate that the bipolar electrochemistry of 1,{2|two},4-benzotriazin-4-yl (Blatter) radicals {allows|enables|permits|makes it possible for} {construction|building} of batteries with symmetric electrolyte composition. Cyclic voltammetry shows that these radicals retain reversible bipolar electrochemistry also {in the|within the|inside the} presence of water. The redox potentials of derivatives {with a|having a|using a} C({3|three})-CF3 substituent are least {affected|impacted} by water and, {moreover|furthermore|in addition|additionally}, these compounds show >90% capacity retention {after|following|right after|soon after|immediately after|just after} charge/discharge cycling {in a|inside a|within a} static H-cell for seven days (ca. {100|one hundred} cycles). Testing these {materials|supplies|components} {in a|inside a|within a} flow regime at 0.1 M concentration of active material confirmed the {high|higher} cycling stability {under|below|beneath} {conditions|circumstances|situations} relevant for RFB operation, and demonstrated that polarity inversion {in a|inside a|within a} symmetric flow battery {may be|might be|could be|could possibly be|can be|may very well be} {used|utilized|employed|utilised|applied|made use of} to rebalance the cell. Chemical synthesis {provides|offers|gives|supplies|delivers} insight {in the|within the|inside the} nature {of the|from the|in the|on the|with the|of your} charged species by spectroscopy and (for the oxidized state) X-ray crystallography. The stability {of these|of those} compounds in all {three|3} states of charge highlights the {potential|possible|prospective} for application in symmetric organic redox-flow batteries. 3-Aminobenzenesulfonyl fluoride Price (3-Cyclopropylphenyl)boronic acid Data Sheet PMID:24513027
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