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Designed Assembly of Porous Cobalt Oxide/Carbon Nanotentacles on Electrospun Hollow Carbon Nanofibers Network for Supercapacitor
ACS Applied Energy Materials ( IF 6.4 ) Pub Date : 2020-03-25 , DOI: 10.1021/acsaem.9b02501
Tanka Mukhiya 1, 2 , Gunendra Prasad Ojha 1 , Bipeen Dahal 1, 3 , Taewoo Kim 1 , Kisan Chhetri 1 , Minju Lee 1 , Su-Hyeong Chae 1 , Alagan Muthurasu 1 , Arjun Prasad Tiwari 1, 4 , Hak Yong Kim 1, 5
Affiliation  

Porous and hollow nanomaterials have been an exciting research area for numerous next-generation technological applications. However, it is still a challenge to assemble porous and hollow nanostructures of appropriate composition and characteristics in designed architectures. Here, we report a self-templated metal–organic frameworks based strategy for the synthesis and engineering of porous and hollow nanostructures in designed architectures by developing graphitic-carbon-intermingled porous Co3O4 nanotentacles, for the first time, on electrospun hollow carbon nanofibers in a designed 3D pattern (3D Co3O4/C@HCNFs). The as-developed nanocomposite sheet, as a free-standing electrode for supercapacitors, shows a high specific capacity of 199 mA h g–1 (1623 F g–1) at 1 A g–1 with good cyclic life and outstanding rate capability. Moreover, the assembled asymmetric supercapacitor device supplies an energy density of 36.6 W h kg–1 at the power density of 471 W kg–1 with significant cyclic life and rate capability indicating its potential practical application. This synthetic strategy suggests a simple, cost-effective and convenient route for the synthesis and assembly of porous and hollow structured nanomaterials in designed architectures for diverse applications.

中文翻译:

静电纺丝中空碳纳米纤维网络上多孔钴氧化物/碳纳米触头的设计组装

多孔和中空纳米材料已成为众多下一代技术应用的激动人心的研究领域。然而,在设计架构中组装具有适当组成和特性的多孔和中空纳米结构仍然是一个挑战。在这里,我们报告了一种基于自模板金属-有机框架的策略,用于通过在电纺制空心碳上首次开发石墨-碳-混杂的多孔Co 3 O 4纳米触头,在设计架构中合成和工程化多孔和空心纳米结构。设计的3D模式的纳米纤维(3D Co 3 O 4/ C @ HCNFs)。纳米复合片作为超级电容器的独立式电极,在1 A g –1的条件下显示出199 mA hg –1(1623 F g –1)的高比容量,具有良好的循环寿命和出色的倍率性能。此外,组装后的非对称超级电容器器件在471 W kg –1的功率密度下可提供36.6 W h kg –1的能量密度,具有显着的循环寿命和倍率能力,表明其潜在的实际应用。这种合成策略为在各种应用的设计架构中合成和组装多孔和中空结构的纳米材料提供了一种简单,经济高效且方便的途径。
更新日期:2020-03-25
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