Issue 3, 2023

A hierarchical integrated 3D carbon electrode derived from gingko leaves via hydrothermal carbonization of H3PO4 for high-performance supercapacitors

Abstract

Electrochemical ultracapacitors derived from green and sustainable materials could demonstrate superior energy output and an ultra-long cycle life owing to large accessible surface area and obviously shortened ion diffusion pathways. Herein, we have established an efficient strategy to fabricate porous carbon (GLAC) from sustainable gingko leaf precursors by a facile hydrothermal activation of H3PO4 and low-cost pyrolysis. In this way, GLAC with a hierarchically porous structure exhibits extraordinary adaptability toward a high energy/power supercapacitor (∼709 F g−1 at 1 A g−1) in an aqueous electrolyte (1 M KOH). Notably, the GLAC-2-based supercapacitor displays an ultra-high stability of ∼98.24% even after 10 000 cycles (10 A g−1) and an impressive energy density as large as ∼71 W h kg−1 at a power density of 1.2 kW kg−1. The results provide new insights that the facile synthetic procedure coupled with the excellent performance contributes to great potential for future application in the electrochemical energy storage field.

Graphical abstract: A hierarchical integrated 3D carbon electrode derived from gingko leaves via hydrothermal carbonization of H3PO4 for high-performance supercapacitors

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
30 Oct 2022
Accepted
06 Dec 2022
First published
10 Jan 2023
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2023,5, 786-795

A hierarchical integrated 3D carbon electrode derived from gingko leaves via hydrothermal carbonization of H3PO4 for high-performance supercapacitors

H. Liu, F. Zhang, X. Lin, J. Wu and J. Huang, Nanoscale Adv., 2023, 5, 786 DOI: 10.1039/D2NA00758D

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