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) a

SUBMITTER: Liu H 

PROVIDER: S-EPMC9890899 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature