Preparation of porous carbon by physical-chemical activation for high-performance supercapacitors

Zheng Xu; Tong Wei

doi:10.1117/12.3015120

6 February 2024 Preparation of porous carbon by physical-chemical activation for high-performance supercapacitors

Zheng Xu, Tong Wei

Proceedings Volume 12979, Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023); 1297954 (2024) https://doi.org/10.1117/12.3015120
Event: 9th International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023), 2023, Guilin, China

Abstract

High weight capacity of activated carbon often requires high specific surface area and developed pore volume, which results in low volumetric specific capacity. In this paper, a combined physical-chemical activation method is proposed to construct a hierarchical pore structure with appropriate distribution of micropores/mesopores. Micropores provide numerous sites for ion adsorption, while mesopores serve as channels for rapid ion transport. Based on this structure, the resulting sample AC30 achieve a high volumetric specific capacitance (335 Fꞏcm^-3 at 0.5 Aꞏg^-1) in 6 M KOH electrolyte. The assembled capacitor could reach a capacitance retention of 94% after 25000 cycles at 10 Aꞏg^-1. The outstanding volumetric specific capacity is attributed to the rational distribution of mesopores and micropores, which also provides guidance for the pore design of carbon materials.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Zheng Xu and Tong Wei "Preparation of porous carbon by physical-chemical activation for high-performance supercapacitors", Proc. SPIE 12979, Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023), 1297954 (6 February 2024); https://doi.org/10.1117/12.3015120

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