Issue 5, 2022

Bio-inspired hierarchical nanoporous carbon derived from water spinach for high-performance supercapacitor electrode materials

Abstract

Due to various properties, green carbon nanomaterials with high specific surface area and environmentally friendly features have aroused extensive interest in energy storage device applications. Here, we report a facile, one-step carbonization of water spinach to synthesize porous carbon that exhibits a high specific surface area of ∼1559 m2 g−1, high specific capacitance (∼1191 F g−1 at 1 A g−1), a low intercept (0.9 Ω), outstanding rate capability and superior cycling stability (94.3% capacitance retention after 10 000 cycles). Moreover, the assembled symmetric cell delivers a high energy density of ∼85 W h kg−1 at 1200 W kg−1 and ultra-high stability (loss of 6.8% after 10 000 cycles). An energy density of 49 W h kg−1 could also be achieved even with a power density of up to 24 kW kg−1, which indicates that this material could be a promising candidate for future applications in aqueous-based supercapacitors.

Graphical abstract: Bio-inspired hierarchical nanoporous carbon derived from water spinach for high-performance supercapacitor electrode materials

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
20 Aug 2021
Accepted
22 Jan 2022
First published
09 Feb 2022
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2022,4, 1445-1454

Bio-inspired hierarchical nanoporous carbon derived from water spinach for high-performance supercapacitor electrode materials

X. Lin, Y. Xu, J. Wu and J. Huang, Nanoscale Adv., 2022, 4, 1445 DOI: 10.1039/D1NA00636C

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