Lignin-derived 3D porous graphene on carbon cloth for flexible supercapacitors. Issue 32 (1st June 2021)

• Record Type: Journal Article
• Authors: Sun, Xinzhi; Jin, Hong; Qu, Wangda
• Is Part Of: RSC advances. Volume 11:Issue 32(2021)
• Page Start: 19695
• Page End: 19704
• Publication Date: 2021-06-01
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra01754c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Lignin was directly grown on carbon cloth via laser writing to form 3D porous graphene for flexible supercapacitors. Abstract : In this work, we reported a new method to fabricate flexible carbon-based supercapacitor electrodes derived from a commercialized and low-cost lignin. The fabrication process skips traditional stabilization/carbonization/activation for lignin-based carbon production. Also, the process reported here was green and facile, with minimum solvent use and no pretreatment required. Characterization of the lignin showed that it has common properties among all types of lignin. The lignin was impregnated on carbon cloth and then subjected to direct laser writing to form the desired electrodes (LLC). The results showed that lignin was successfully bonded to carbon cloth. The LLC has a good porous carbon structure with a high I G / I D ratio of 1.39, and a small interlayer spacing d 002 of 0.3436 nm, which are superior to most of the reported lignin-based carbons. Although not optimized, the fabricated LLC showed good supercapacitance behavior with an areal capacitance of 157.3 mF cm −2 at 0.1 mA cm −2 . In addition, the superior flexibility of LLC makes it a promising electrode that can be used more widely in portable devices. Conceptually, this method can be generalized to all types of lignin and can define intriguing new research interests towards lignin applications.