Conjugated Azo Compounds as Active Materials for Rechargeable Sodium‐ metal Batteries with High‐rate Performance
Conjugated Azo Compounds as Active Materials for Rechargeable Sodium‐ metal Batteries with High‐rate Performance
复制标题
共轭偶氮化合物作为高倍率性能可充电钠金属电池的活性材料
DOI：
10.1002/batt.202200413
复制
发表时间：
--
期刊：
影响因子：
--
通讯作者：
Qichun Zhang
中科院分区：
文献类型：
--
作者：
Jiawen Wang;Yifan Tong;Weiwei Huang;Qichun Zhang
有机电极材料因其储量丰富、柔性好、环境友好等优点，在金属钠电池领域受到越来越多的关注。然而，有机小分子在电解液中稳定性差，导致电池容量衰减，循环寿命缩短。为了解决这些问题，我们报道了一种以N=N和C=N为活性中心的线形聚合物p-PADA。它的高度共轭和聚合结构赋予了p-PADA电极稳定性、更快的反应动力学和优异的倍率性能。当电流密度达到5 A g−1时，p-PADA在1000次循环后仍具有313 mAhg 1的比容量。这项工作表明，聚合是提高有机材料电化学性质的有效方法。
Organic electrode materials have gained growing attention in the field of sodium‐metal batteries due to their rich reserves, flexibility, and environmental friendliness. However, organic small molecules suffer from poor stability in the electrolyte leading to the decay of battery capacity and reduced cycle life. To address these issues, we report a linear polymer p‐PADA with N=N and C=N as active centers. Its highly‐conjugated and polymerized structure endows the p‐PADA electrode stability, faster reaction kinetics, and exceptional rate performance. When the current density reaches 5 A g−1, p‐PADA still exhibits a specific capacity of 313 mAh g−1after 1000 cycles. This work demonstrates that polymerization is an effective method to enhance the electrochemical properties of organic materials.