An ultrasonic-assisted synthesis of rice-straw-based porous carbon with high performance symmetric supercapacitors.

ABSTRACT: Biomass porous carbon materials are ideal supercapacitor electrode materials due to their low price, rich source of raw materials and environmental friendliness. In this study, an ultrasonic-assisted method was applied to synthesize the rice-straw-based porous carbon (UPC). The obtained UPC exhibited a two-dimensional structure and high specific surface area. In addition, the electrochemical test results showed that the UPC with a 1 hour ultrasonic treatment and lower activation temperature of 600 °C (UPC-600) demonstrated optimal performance: high specific capacitances of 420 F g^-1 at 1.0 A g^-1 and 314 F g^-1 at a high current of 10 A g^-1. Significantly, the symmetric supercapacitors showed a high energy density of 11.1 W h kg^-1 and po

SUBMITTER: Zhou G 

PROVIDER: S-EPMC9048626 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature