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Knittable energy storing fiber with high volumetric performance made from predominantly MXene nanosheets
journal contribution
posted on 2022-10-26, 04:29 authored by S Seyedin, E R S Yanza, Joselito RazalJoselito RazalA new member of the 2D family called "MXene" offers metallic conductivity and outstanding electrochemical properties that are important for developing fiber supercapacitors. To date, however, scalable approaches for preparing MXene-based fibres have been relatively unexplored. Here we demonstrate that a graphene oxide liquid crystal-assisted fiber spinning approach can be used to produce novel fibers that are predominantly MXene by weight (∼88 wt%). These MXene fibers exhibit high volumetric capacitance (∼341 F cm-3) and electrical conductivity (∼72.3 S cm-1) and excellent strength and flexibility that allow knitting of MXene-based textile prototypes. The supercapacitor device made from MXene fibers displays excellent stability after 20000 cycles and delivers maximum energy and power densities of ∼5.1 mW h cm-3 and ∼1700 mW cm-3, respectively. This work introduces a new class of fiber supercapacitors that offer great potential for realizing flexible power sources for miniaturized electronic gadgets and wearable technologies.