Ultrahigh Surface Area N-Doped Hierarchically Porous Carbon for Enhanced CO 2 Capture and Electrochemical Energy Storage

• Published in: ChemSusChem 2019-08, Vol.12 (15), p.3541-3549
• Main Authors: Wang, Shuai, Qin, Jieqiong, Zhao, Yujuan, Duan, Linlin, Wang, Jinxiu, Gao, Wenjun, Wang, Ruicong, Wang, Changyao, Pal, Manas, Wu, Zhong-Shuai, Li, Wei, Zhao, Dongyuan
• Format: Article
• Language: English
• ISSN: 1864-5631; 1864-564X
• DOI: 10.1002/cssc.201901137

Facile synthesis of ultrahigh surface area porous carbons with well-defined functionalities such as N-doping remains a formidable challenge as extensive pore creation results in significant damage to the active sites. Herein, an ultrahigh surface area, N-doped hierarchically porous carbon was prepared through a multicomponent co-assembly approach. The resultant N-doped hierarchically porous carbon (N-HPC) possessed an ultrahigh surface area (≈1960 m  g ), a uniform interpenetrating micropore (≈1.3 nm) and large mesopore (≈7.6 nm) size, and high N-doping in the carbon frameworks (≈5 wt %). The N-HPC exhibited a high specific capacitance (358 F g at 0.5 A g ) as a supercapacitor electrode in aqueous alkaline electrolyte with a stable cycling performance after10 000 charge/discharge cycles. Moreover, as a CO absorbent, N-HPC displayed an adsorption capacity of 29.0 mmol g at 0 °C under a high pressure of 30 bar.