Rylene imides (RIs) are attractive organic battery materials because of the inherent modularity of the molecules. While strong aggregation of RIs is disadvantageous for fast lithium‐ion transport in the organic active material, decreasing the solubility of the RIs in battery electrolytes is essential to avoid performance fading. Therefore, the design and synthesis of RIs for lithium batteries is a non‐trivial task that must, among other considerations, balance lithium‐ion transport in the solid material vs. low solubility by controlling aggregation and packing. We have chosen triphenylamine (TPA) as a substituent which disrupts the aggregation but maintains a low solubility due to increased aromaticity of TPA. We have synthesized three RIs with 1, 2 and 4 aromatic units in the core. All of them showed stable specific capacity over 300 charge‐discharge cycles. The batteries also showed specific capacities close to their theoretical capacities with 97‐99% coulombic efficiency. The maximum specific energy and specific power were 197 mWh g ‐1 and 37 mW g ‐1 , respectively.

中文翻译：

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芳环和取代基对带有亚芳基酰亚胺阴极的锂电池性能的影响

由于分子的固有模块性，亚芳基酰亚胺（RIs）是有吸引力的有机电池材料。虽然RI的强聚集体不利于有机活性材料中锂离子的快速运输，但降低RI在电池电解质中的溶解度对于避免性能下降至关重要。因此，锂电池RI的设计和合成是一项艰巨的任务，除其他考虑因素外，还必须通过控制聚集和堆积来平衡固体材料中锂离子的运输与低溶解度之间的平衡。我们选择了三苯胺（TPA）作为取代基，该取代基可破坏聚集，但由于TPA芳香性增加而保持较低的溶解度。我们合成了三个具有1、2和4个芳族单元的RI。它们在300个充放电循环中均显示出稳定的比容量。电池还显示出接近其理论容量的比容量，库仑效率为97-99％。最大比能量和比功率分别为197 mWh g -1和37 mW g -1。