Interface Engineering of Biomass‐Derived Carbon used as Ultrahigh‐Energy‐Density and Practical Mass‐Loading Supercapacitor Electrodes. (16th December 2022)

• Record Type: Journal Article
• Authors: Chen, Ruwei; Tang, Hao; He, Peng; Zhang, Wei; Dai, Yuhang; Zong, Wei; Guo, Fei; He, Guanjie; Wang, Xiaohui
• Is Part Of: Advanced functional materials. Volume 33:Number 8(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-12-16
• Subjects: graphene‐like carbon -- high energy density -- high mass loading -- interface engineering -- supercapacitors; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202212078
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: The development of flexible electrodes with high mass loading and efficient electron/ion transport is of great significance but still remains the challenge of innovating suitable electrode structures for high energy density application. Herein, for the first time, lignosulfonate‐derived N/S‐co‐doped graphene‐like carbon is in situ formed within an interface engineered cellulose textile through a sacrificial template method. Both experimental and theoretical calculations disclose that the formed pomegranate‐like structure with continuous conductive pathways and porous characteristics allows sufficient ion/electron transport throughout the entire structures. As a result, the obtained flexible electrode delivers a remarkable integrated capacitance of 6534 mF cm −2 (335.1 F g −1 ) and a superior stability at an industrially applicable mass loading of 19.5 mg cm −2 . A pseudocapacitive cathode with ultrahigh capacitance of 7000 mF cm −2 can also be obtained based on the same electrode structure engineering. The as‐assembled asymmetric supercapacitor achieves a high areal capacitance of 3625 mF cm −2, and a maximum energy density of 1.06 mWh cm −2, outperforms most of other reported high‐loading supercapacitors. This synthesis method and structural engineering strategy can provide materials design concepts and a wide range of applications in the fields of energy storage beyond supercapacitors. Abstract : Hierarchical nitrogen‐doped carbon interface is built on cellulose textile to accommodate lignosulfonate‐derived N/S‐co‐doped graphene‐like carbon. The formed pomegranate‐like structure with continuous conductive pathways and high porosity allows sufficient ion/electron transport even at high mass loading. Benefitting from this versatile electrode structure engineering, both cathode and anode achieve ultrahigh capacitance for wearable supercapacitor with high energy density.