Double Soft-Template Synthesis of Nitrogen/Sulfur-Codoped Hierarchically Porous Carbon Materials Derived from Protic Ionic Liquid for Supercapacitor

• Published in: ACS applied materials & interfaces 2017-08, Vol.9 (31), p.26088-26095
• Main Authors: Sun, Li, Zhou, Hua, Li, Li, Yao, Ying, Qu, Haonan, Zhang, Chengli, Liu, Shanhu, Zhou, Yanmei
• Format: Article
• Language: English
• ISSN: 1944-8244; 1944-8252
• DOI: 10.1021/acsami.7b07877

Heteroatom-doped hierarchical porous carbon materials derived from the potential precursors and prepared by a facile, effective, and low-pollution strategy have recently been particularly concerned in different research fields. In this study, the interconnected nitrogen/sulfur-codoped hierarchically porous carbon materials have been successfully obtained via one-step carbonization of the self-assembly of [Phne]­[HSO4] (a protic ionic liquid originated from dilute sulfuric acid and phenothiazine by a straightforward acid–base neutralization) and the double soft-template of OP-10 and F-127. During carbonization process, OP-10 as macroporous template and F-127 as mesoporous template were removed, while [Phne]­[HSO4] not only could be used as carbon, nitrogen, and sulfur source, but also as a pore forming agent to create micropores. The acquired carbon materials for supercapacitor not only hold a large specific capacitance of 302 F g–1 even at 1.0 A g–1, but also fine rate property with 169 F g–1 at 10 A g–1 and excellent capacitance retention of nearly 100% over 5000 circulations in 6 M KOH electrolyte. Furthermore, carbon materials also present eximious rate performance with 70% in 1 M Na2SO4 electrolyte.