Three-dimensional nanoporous activated carbon electrode derived from acacia wood for high-performance supercapacitor

Hamouda Adam Hamouda; Hassan Idris Abdu; Qinzheng Hu; Mohamed Aamer Abubaker; Haikuo Lei; Shuzhen Cui; Anwar I Alduma; Hui Peng; Guofu Ma; Ziqiang Lei

doi:10.3389/fchem.2022.1024047

Three-dimensional nanoporous activated carbon electrode derived from acacia wood for high-performance supercapacitor

Front Chem. 2022 Oct 12:10:1024047. doi: 10.3389/fchem.2022.1024047. eCollection 2022.

Authors

Hamouda Adam Hamouda^{1

2}, Hassan Idris Abdu³, Qinzheng Hu¹, Mohamed Aamer Abubaker^{4

5}, Haikuo Lei¹, Shuzhen Cui¹, Anwar I Alduma², Hui Peng¹, Guofu Ma¹, Ziqiang Lei¹

Affiliations

¹ Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, China.
² Department of Chemistry, Faculty of Science, University of Kordofan, El Obeid, Al-Ubayyid, Sudan.
³ Qinba State Key Laboratory of Biological Resources and Ecological Environment, 2011 QinLing-Bashan Mountains Bioresources Comprehensive Development C. I. C., Shaanxi Province Key Laboratory of Bio-resources, College of Bioscience and Bioengineering, Shaanxi University of Technology, Hanzhong, China.
⁴ College of Life Science, Northwest Normal University, Lanzhou, China.
⁵ Department of Biology, Faculty of Education, University of Khartoum, Khartoum, Sudan.

Abstract

Herein, the novel acacia wood based hierarchical porous activated carbons (AWCs) are easily prepared, low cost and have excellent characterization, such as special biomass nanopores via structural stability and large specific surface areas. Activating agents such as KOH, ZnCl₂, and H₃PO₄ have been used to convert acacia wood carbon into active carbons such as AWC-K, AWC-Z, and AWC-P, respectively, which are named after the activating agent. As a supercapacitor electrode, the AWC-K sample has a high yield was 69.8%, significant specific surface area of 1563.43 m²g^-1 and layer thickness of 4.6 mm. Besides that, it showed specific capacitance of 224.92 F g^-1 at 0.5 A g^-1 in 2 M KOH as electrolyte. In addition, the AWC-K//AWC-K symmetrical supercapacitor device displays high energy density of 23.98 Wh kg^-1 at 450 W kg^-1 power density with excellent cycling number stability was 93.2% long lifetime of 10,000 cycles using 0.5 M Na₂SO₄ as electrolyte. The high electrochemistry performance mainly contributed the special biomass pores structure. Therefore, the presented approach opens new avenues in supercapacitor applications to meet energy storage.

Keywords: acacia wood; electrode materials; energy density; porous carbon; supercapacitor.