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Naphthoquinone-Based Composite Cathodes for Aqueous Rechargeable Zinc-Ion Batteries
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-01-17 , DOI: 10.1021/acsami.0c21339 James Kumankuma-Sarpong 1 , Shuai Tang 1 , Wei Guo 1 , Yongzhu Fu 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-01-17 , DOI: 10.1021/acsami.0c21339 James Kumankuma-Sarpong 1 , Shuai Tang 1 , Wei Guo 1 , Yongzhu Fu 1
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Conventional organic batteries suffer from rapid capacity fading. Organic compounds are inclined to dissolve in the electrolyte and limit the long-term cycling performance of lithium–organic batteries. Carbon skeletons show efficacy in confining the active materials of organic cathodes. In this study, we investigate the electrochemical performance of aqueous zinc-ion batteries with binder-free composite cathodes consisting of carbon nanotubes (CNTs) and naphthoquinone (NQ)-based organics. The quinones are trapped in the nanoporous structure of the CNT framework, and thus the dissolution was minimized. The composite cathodes show stable and high rate cyclability, owing to the high electrical conductivity and confinement of the CNT network. The NQ composite cathode exhibits an initial capacity of 333.5 mAh g–1, close to the theoretical capacity of 339.0 mAh g–1. Furthermore, it is uncovered that modifying NQ with functional groups significantly impacts the electrochemical behavior, including the redox potential and capacity retention. With the electron-withdrawing or electron-donating groups, dichlone and 2-((4-hydroxyphenyl) amino) naphthalene-1,4-dione (APh-NQ) show better performance than NQ with improved capacity retention from 41.0 to 70.9 and 68.3%, respectively, after 1000 cycles. The work promotes the development of binder-free organic cathodes for the aqueous Zn-ion batteries and sheds light on designing high-performance electrodes for low-cost energy storage systems.
中文翻译：
萘醌基复合阴极，用于可充电锌离子电池
常规有机电池的容量迅速下降。有机化合物倾向于溶解在电解质中，并限制了锂有机电池的长期循环性能。碳骨架在限制有机阴极活性材料方面显示出功效。在这项研究中，我们研究了具有无粘合剂的复合阴极的水性锌离子电池的电化学性能，该复合阴极由碳纳米管（CNT）和萘醌（NQ）基有机物组成。醌被困在CNT骨架的纳米孔结构中，因此溶解度降至最低。由于高电导率和CNT网络的限制，复合阴极显示出稳定且高速率的循环性。NQ复合阴极的初始容量为333.5 mAh g –1，接近理论容量339.0 mAh g –1。此外，已经发现用官能团修饰NQ显着影响电化学行为，包括氧化还原电势和容量保持率。具有吸电子或供电子基团，二氯萘醌和2-（（4-羟苯基）氨基）萘-1,4-二酮（APh-NQ）的性能优于NQ，容量保持率从41.0提高至70.9和68.3 1000个循环后分别为％。这项工作促进了用于水性Zn离子电池的无粘合剂有机阴极的开发，并为设计用于低成本储能系统的高性能电极提供了启示。
更新日期：2021-01-27
中文翻译：
萘醌基复合阴极，用于可充电锌离子电池
常规有机电池的容量迅速下降。有机化合物倾向于溶解在电解质中，并限制了锂有机电池的长期循环性能。碳骨架在限制有机阴极活性材料方面显示出功效。在这项研究中，我们研究了具有无粘合剂的复合阴极的水性锌离子电池的电化学性能，该复合阴极由碳纳米管（CNT）和萘醌（NQ）基有机物组成。醌被困在CNT骨架的纳米孔结构中，因此溶解度降至最低。由于高电导率和CNT网络的限制，复合阴极显示出稳定且高速率的循环性。NQ复合阴极的初始容量为333.5 mAh g –1，接近理论容量339.0 mAh g –1。此外，已经发现用官能团修饰NQ显着影响电化学行为，包括氧化还原电势和容量保持率。具有吸电子或供电子基团，二氯萘醌和2-（（4-羟苯基）氨基）萘-1,4-二酮（APh-NQ）的性能优于NQ，容量保持率从41.0提高至70.9和68.3 1000个循环后分别为％。这项工作促进了用于水性Zn离子电池的无粘合剂有机阴极的开发，并为设计用于低成本储能系统的高性能电极提供了启示。
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