Ultra-high specific surface area porous carbons derived from Chinese medicinal herbal residues with potential applications in supercapacitors and CO2 capture

作者：Lei, Dongjun; Zeng, Yanxian; Zhong, Jinlin; Chen, Jifan; Ye, Yajing; Wang, Weixing^*

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2023, 666: 131327.

DOI：10.1016/j.colsurfa.2023.131327

• Porous carbons
• Chinese medicinal herbal residues
• Ultra-high specific surface area
• Supercapacitor
• CO2 capture

Ultra-high specific surface area (SSA, > 3000 m2 g-1) porous carbons are promising materials for energy storage and gas selective adsorption and separation. In this work, we have synthesized porous carbons with ultra-high SSAs (up to 3410 m2 g-1) and large pore volumes (up to 2.095 cm3 g-1) from Chinese medicinal herbal resi-dues (CHRs). The obtained ultra-high SSA porous carbons display good electrochemical performance as the electrode materials for supercapacitors with specific capacitances of up to 291.6 F g-1 at 1 A g-1 in 6 M KOH, as well as high rate retentions (72.0-82.1 %) at 50 A g-1. Moreover, as the CO2 capture materials, the ultra-high SSA porous carbons display high CO2 uptake capacities (up to 30.0 mmol g-1 at 298 K, 30 bar). Our work provides an effective strategy to fabricate ultra-high SSA CHRs derived porous carbons which simultaneously possess the great potential for energy storage and CO2 capture.