Redoxmers are organic molecules that serve as charge carriers in redox flow batteries. While these materials are affordable and easy to source, insufficient stability of their charged states (radical ions) remains a challenge. A common reaction of these species is their disproportionation. This reversible reaction yields unstable multiply charged states, shifting the overall charge transfer equilibrium toward the decomposition products. Here we show how kinetic controls can be engineered into a redoxmer molecule to suppress these unwanted charge transfer reactions. This approach is used to transform Wurster’s blue, which is historically the first example of a stable radical ion in organic chemistry, into an exceptionally durable redoxmer molecule that persists over thousands of electrochemical cycles.

中文翻译：

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歧化的动力学控制稳定了 Wurster 用于非水氧化还原液流电池的 Blue Catholyte


氧化还原剂是有机分子，在氧化还原液流电池中用作电荷载流子。虽然这些材料价格低廉且易于采购，但其带电状态（自由基离子）的稳定性不足仍然是一个挑战。这些物种的一个常见反应是它们的不成比例。这种可逆反应产生不稳定的多电荷态，使整体电荷转移平衡向分解产物转移。在这里，我们展示了如何将动力学控制设计成氧化还原聚体分子，以抑制这些不需要的电荷转移反应。这种方法用于将 Wurster 蓝（历史上有机化学中第一个稳定自由基离子的例子）转化为一种非常耐用的氧化还原聚物分子，该分子可以持续数千次电化学循环。