A densification-activation strategy toward hierarchical porous self-supporting thick carbon electrodes for high-power supercapacitors

In this study, a high-load self-supporting thick carbon electrode (35.2 mg cm^-2) was constructed by hot-pressing densification combined with KOH activation of natural wood. Its hierarchical pore structure synergistically optimizes energy storage performance (3.5 F cm^-2) and provides a new strategy for the practical application of supercapacitors.