A highly flexible yet high‐energy‐density cathode for lithium‐ion batteries is fabricated with a novel redox‐active binder polymer composed of 2,2,6,6‐tetramethylpiperidine 1‐oxyl (TEMPO) with vinyl ether main chain, lithium cobalt oxide, and single‐walled carbon nanotube. The cathode itself and its battery display excellent durability against repeated bending over 10⁴ times. The highest volumetric capacity beyond 300 mAh cm⁻³ as a flexible electrode is achieved based on the highly adhesive and redox‐active, robust radical polyether binder. A highly flexible, only 0.5 mm‐thick, lithium‐ion battery charge/discharges repeatedly with constant output around 3.8 V even under rapid bending. Herein, the operation of flexible electronic devices with well‐balanced energy density and power‐supplying purposes is discussed.

中文翻译：

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高度灵活但大于300 mAh cm-3的能量密度锂离子电池，装配有氧化还原活性聚醚粘合剂的阴极

锂离子电池的高柔性但高能量密度阴极是由新型氧化还原活性粘合剂聚合物制成的，该聚合物由带有乙烯基醚主链的2,2,6,6-四甲基哌啶1-氧基（TEMPO）和钴钴酸锂组成氧化物和单壁碳纳米管。阴极本身及其电池显示出优异的耐久性，可抵抗10 ⁴次以上的反复弯曲。最高容量超过300 mAh cm ^-3柔性电极是基于高度粘合和具有氧化还原活性的坚固自由基聚醚粘合剂制成的。高度灵活，厚度仅为0.5毫米的锂离子电池即使在快速弯曲的情况下也能以3.8 V左右的恒定输出反复充电/放电。本文讨论了能量密度和供电目的均衡的柔性电子设备的操作。