Designed Assembly of Porous Cobalt Oxide/Carbon Nanotentacles on Electrospun Hollow Carbon Nanofibers Network for Supercapacitor
Tanka Mukhiya, Gunendra Prasad Ojha, Bipeen Dahal, Taewoo Kim, Kisan Chhetri, Minju Lee, Su‐Hyeong Chae, Alagan Muthurasu, Arjun Prasad Tiwari, Hak Yong Kim
Abstract
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 Co 3 O 4 nanotentacles, for the first time, on electrospun hollow carbon nanofibers in a designed 3D pattern (3D Co 3 O 4 /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.