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- Wei, Jiayuan, et al.
(author)
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Green carbon nanofiber networks for advanced energy storage
- 2020
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In: ACS Applied Energy Materials. - : American Chemical Society (ACS). - 2574-0962. ; 3:4, s. 3530-3540
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Journal article (peer-reviewed)abstract
- Energy storage devices such as supercapacitors of high-performance are in great need due to the continuous expansion of digitalization and related devices for mobile electronics, autonomous sensors and vehicles of different kinds. However, the non-renewable resources and often complex preparation processes associated with electrode materials and structure pose limited scale-up in production and difficulties in versatile utilization of the devices. Here, free-standing and flexible carbon nanofiber networks derived from renewable and abundant bio-resources are demonstrated. By a simple optimization of carbonization, the carbon nanofiber networks reach a large surface area of 1670 m2 g-1 and excellent specific gravimetric capacitance of ~240 F g-1, outperforming many other nanostructured carbon, activated carbon and even those decorated with metal oxides. The remarkable electrochemical performance and flexibility of the green carbon networks enable an all-solid-state supercapacitor device, which displays a device capacitance of 60.4 F g-1 with a corresponding gravimetric energy density of 8.4 Wh kg-1 while maintaining good mechanical properties.
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