A foldable composite electrode with excellent electrochemical performance using microfibrillated cellulose fibers as a framework. Issue 41 (11th October 2018)

• Record Type: Journal Article
• Authors: Liu, Qingzhong; Chen, Zehong; Jing, Shuangshuang; Zhuo, Hao; Hu, Yijie; Liu, Jinchao; Zhong, Linxin; Peng, Xinwen; Liu, Chuanfu
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 41(2018)
• Page Start: 20338
• Page End: 20346
• Publication Date: 2018-10-11
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8ta06635c
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A foldable composite electrode was fabricated for a flexible supercapacitor. The composite possesses not only excellent electrochemical properties, but also structural stability. Abstract : There is an increasing demand for developing environment-friendly and cost-effective strategies to synthesize high-performance flexible supercapacitor electrode materials. Biomass-derived carbon materials are very promising and attractive candidates due to their outstanding advantages. Herein, we prepared a foldable composite electrode based on a chitosan-derived N-self-doped carbon sheet (N-CS) and a microfibrillated cellulose fiber (MCF) framework. The N-CS plays a key role in tailoring the electrochemical behavior of electrode, while the MCF framework offers a porous structure with excellent mechanical foldability. In situ PANI improves the conductivity of the MCF framework and provides abundant active redox sites for energy storage. This foldable composite electrode possesses a high specific areal capacitance of 1688.8 mF cm −2 (139.6 F g −1, 84.4 F cm −3 ) at 1 mA cm −2 and an energy density of 11.75 mW h cm −3 at a power density of 25 mW cm −3 . Furthermore, benefitting from the mechanical foldability of the MCF framework, the composite can perform well in the folded state. Besides, as a PANI-containing electrode material, its long-term cycling stability is pretty good (more than 84% retention after 5000 cycles). Therefore, this work provides an environment-friendly, cost-effective and high-performance electrode material for foldable electronic devices.