An Ultrasonic-assisted Synthesis of Rice-straw-based Porous Carbon with High Performance Symmetric Supercapacitors

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 May 2

PMID 35497722

Authors

Guolang Zhou

Jingzhou Yin

Zechun Sun

Xiaoliang Gao

Fengxia Zhu

Pusu Zhao

Rongqing Li

Jiaying Xu

Affiliations

Soon will be listed here.

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 at 1.0 A g and 314 F g at a high current of 10 A g. Significantly, the symmetric supercapacitors showed a high energy density of 11.1 W h kg and power density of 500 W kg. After 10 000 cycles, 99.8% of the specific capacitance was retained at 20 A g. These results indicate that UPC-600 is a promising candidate for supercapacitor electrode materials.

Citing Articles

Comparing specific capacitance in rice husk-derived activated carbon through phosphoric acid and potassium hydroxide activation order variations.

Barakat N, Mahmoud M, Moustafa H Sci Rep. 2024; 14(1):1460.

PMID: 38233435 PMC: 10794207. DOI: 10.1038/s41598-023-49675-0.

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