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Coupling PEDOT on Mesoporous Vanadium Nitride Arrays for Advanced Flexible All-Solid-State Supercapacitors.
Small ( IF 13.3 ) Pub Date : 2020-08-09 , DOI: 10.1002/smll.202003434
Minghua Chen 1 , He Fan 1 , Yan Zhang 2 , Xinqi Liang 1 , Qingguo Chen 1 , Xinhui Xia 2
Affiliation  

Tailored construction of advanced flexible supercapacitors (SCs) is of great importance to the development of high‐performance wearable modern electronics. Herein, a facile combined wet chemical method to fabricate novel mesoporous vanadium nitride (VN) composite arrays coupled with poly(3,4‐ethylenedioxythiophene) (PEDOT) as flexible electrodes for all‐solid‐state SCs is reported. The mesoporous VN nanosheets arrays prepared by the hydrothermal–nitridation method are composed of cross‐linked nanoparticles of 10–50 nm. To enhance electrochemical stability, the VN is further coupled with electrodeposited PEDOT shell to form high‐quality VN/PEDOT flexible arrays. Benefiting from high intrinsic reactivity and enhanced structural stability, the designed VN/PEDOT flexible arrays exhibit a high specific capacitance of 226.2 F g−1 at 1 A g−1 and an excellent cycle stability with 91.5% capacity retention after 5000 cycles at 10 A g−1. In addition, high energy/power density (48.36 Wh kg−1 at 2 A g−1 and 4 kW kg−1 at 5 A g−1) and notable cycling life (91.6% retention over 10 000 cycles) are also achieved in the assembled asymmetric flexible supercapacitor cell with commercial nickel–cobalt–aluminum ternary oxides cathode and VN/PEDOT anode. This research opens up a way for construction of advanced hybrid organic–inorganic electrodes for flexible energy storage.

中文翻译:

用于高级柔性全固态超级电容器的介孔氮化钒阵列上的PEDOT耦合。

量身定制的高级柔性超级电容器(SC)的构建对于高性能可穿戴现代电子产品的发展至关重要。本文报道了一种简便的组合湿化学方法,该方法制备了新颖的介孔氮化钒(VN)复合阵列与聚(3,4-乙撑二氧噻吩)(PEDOT)结合作为全固态SC的柔性电极。水热氮化法制备的介孔VN纳米片阵列由10–50 nm的交联纳米颗粒组成。为了增强电化学稳定性,将VN进一步与电沉积的PEDOT外壳耦合,以形成高质量的VN / PEDOT柔性阵列。受益于高固有反应性和增强的结构稳定性,设计的VN / PEDOT柔性阵列显示出226.2 F g的高比电容。-1 1 A G -1,并用91.5%的容量保持5000次循环后,以10A克优异的循环稳定性-1。另外,高能量/功率密度(48.36公斤瓦-1以2A克-1和4千瓦千克-1在5 A G -1)和显着的循环寿命(超过10个周期91.6%保留)中,也能够实现组装好的非对称柔性超级电容器电池,带有商用镍-钴-铝三元氧化物阴极和VN / PEDOT阳极。这项研究为构建用于柔性储能的高级混合有机-无机电极开辟了道路。
更新日期:2020-09-18
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