当前位置: X-MOL 学术Chem. Eng. J. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Ultra-Strong Capillarity of Bioinspired Micro/Nanotunnels in Organic Cathodes Enabled High-Performance All-Organic Sodium-Ion Full Batteries
Chemical Engineering Journal ( IF 15.1 ) Pub Date : 2020-11-03 , DOI: 10.1016/j.cej.2020.127597
Gangyong Zhou , Lulu Mo , Chunyang Zhou , Yue Wu , Feili Lai , Yan Lv , Jianmin Ma , Yue-E Miao , Tianxi Liu

As one of the typical organic cathode materials for sodium ion batteries (SIBs), 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) is formidably challenged in practical applications because of its low electrical conductivity, sluggish reaction kinetics, inferior rate capability and cycle life. Inspired by the ultra-strong capillarity of wood's aligned hierarchical microchannels toward ions and water during metabolism, we have designed a novel composite nanofibrous organic cathode consisting of PTCDA/nitrogen-doped carbon/carbon nanotubes (PTCDA/NC/CNT) for SIBs. The PTCDA/NC/CNT cathode exhibits rapid ionic/electronic transport properties and ultrafast reaction kinetics owing to the synergistic effects of the interconnected conductive frameworks and ultra-strong capillarity deriving from the hierarchical micro/nanotunnels. As a result, a highly reversible capacity of 135.6 mA h g-1 at 50 mA g-1, excellent rate performance and ultra-long cyclic stability with over 95% capacity retention after 500 cycles at 1000 mA g-1 are achieved for the PTCDA/NC/CNT cathode in SIBs. Remarkably, an all-organic battery using the PTCDA/NC/CNT cathode and conjugated sodium carboxylate/CNT anode also delivers a high energy density of 85 W h kg-1 at a power density of 665 W kg-1. This bio-inspired design provides a promising strategy for the development of next-generation all-organic sodium-ion full batteries.



中文翻译:

在有机阴极中具有生物启发性的微/纳米隧道的超强毛细管作用,可实现高性能全有机钠离子全电池

3,4,9,10-per四羧酸二酐(PTCDA)作为钠离子电池(SIB)的典型有机阴极材料之一,由于其低电导率,缓慢的反应动力学,低速率能力和低电导率,在实际应用中受到了极大的挑战。循环寿命。受木材在代谢过程中朝向离子和水的排列微通道的超强毛细管作用的启发,我们设计了一种新颖的复合纳米纤维有机阴极,该复合阴极由PTCDA /氮掺杂碳/碳纳米管(PTCDA / NC / CNT)组成,用于SIB。PTCDA / NC / CNT阴极表现出快速的离子/电子传输性能和超快的反应动力学,这归因于相互连接的导电框架的协同效应和源自分层微/纳孔的超强毛细管现象。结果是,-1在50mA克-1,优异的倍率性能,并以1000mA克与500次循环后95%以上的容量维持超长时间循环稳定性-1被用于在SIB中的PTCDA / NC / CNT阴极实现。值得注意的是,使用PTCDA / NC / CNT阴极和共轭羧酸钠/ CNT阳极的全有机电池在665 W kg -1的功率密度下也可提供85 W h kg -1的高能量密度。这种以生物为灵感的设计为下一代全有机钠离子全电池的开发提供了有希望的策略。

更新日期:2020-11-03
down
wechat
bug