Bio-inspired hierarchical nanoporous carbon derived from water spinach for high-performance supercapacitor electrode materials. Issue 5 (11th February 2022)

• Record Type: Journal Article
• Authors: Lin, Xinyu; Xu, Yaping; Wu, Jinggao; Huang, Jing
• Is Part Of: Nanoscale advances. Volume 4:Issue 5(2022)
• Page Start: 1445
• Page End: 1454
• Publication Date: 2022-02-11
• Subjects: 620.5
• DOI: 10.1039/d1na00636c
• Languages: English
• ISSNs: 2516-0230

Abstract

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. 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 m 2 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.