Work

Application of salicylic acid-modified bamboo-based oxygen-enriched graded porous carbon in solid-state supercapacitors

Year: 2026

Type: article

Abstract: Bamboo, as a rapidly growing, sustainable resource with a naturally porous structure, holds great potential for applications in the field of green energy storage. However, the electrochemical performance of carbon materials derived from direct pyrolysis of bamboo remains suboptimal. To address this, this study introduced environmentally friendly salicylic acid as a modifier and, through a combination of low-temperature hydrothermal pretreatment and carbonization activation, successfully synthesized oxygen-doped, bamboo-derived hierarchical porous carbon materials. The results indicate that by adjusting the dosage of salicylic acid, the morphological structure, elemental composition, and related electrochemical properties of the material can be effectively modulated. The porous carbon material SABC-3, which is made from a mixture of salicylic acid and bamboo in an appropriate ratio, exhibits an average pore size of 3.20 nm and an oxygen content of 12.77%. It has a relatively high specific capacitance of 326 F g −1 at 0.5 A g −1 . The symmetric supercapacitor SABC-3//SABC-3 assembled with a PPA/KOH solid-state electrolyte exhibits an energy density of 25.00 Wh kg⁻¹ at 750 W kg⁻¹ . Furthermore, it demonstrates exceptional cycle stability, maintaining 88.10% of a capacitance after 10,000 consecutive cycles at 10 A g −1 . Connecting two capacitors in series can power an LED, demonstrating promising potential for practical applications.

Source: Industrial Crops and Products

DOI: 10.1016/j.indcrop.2026.124231