Volume 132, Issue 20 pp. 8008-8017
Forschungsartikel

Magnetothermal Microfluidic-Assisted Hierarchical Microfibers for Ultrahigh-Energy-Density Supercapacitors

Hui Qiu

Hui Qiu

State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University (formerly Nanjing University of Technology), Nanjing, 210009 P. R. China

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Hengyang Cheng

Hengyang Cheng

State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University (formerly Nanjing University of Technology), Nanjing, 210009 P. R. China

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Jinku Meng

Jinku Meng

State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University (formerly Nanjing University of Technology), Nanjing, 210009 P. R. China

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Prof. Guan Wu

Corresponding Author

Prof. Guan Wu

State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University (formerly Nanjing University of Technology), Nanjing, 210009 P. R. China

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Prof. Su Chen

Prof. Su Chen

State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University (formerly Nanjing University of Technology), Nanjing, 210009 P. R. China

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First published: 20 February 2020
Citations: 24

Abstract

Chemical architectures with an ordered porous backbone and high charge transfer are significant for fiber-shaped supercapacitors (FSCs). However, owing to the sluggish ion kinetic diffusion and storage in compacted fibers, achieving high energy density remains a challenge. An innovative magnetothermal microfluidic method is now proposed to design hierarchical carbon polyhedrons/holey graphene (CP/HG) core–shell microfibers. Owing to highly magnetothermal etching and microfluidic reactions, the CP/HG fibers maintain an open inner-linked ionic pathway, large specific surface area, and moderate nitrogen active site, facilitating more rapid ionic dynamic transportation and accommodation. The CP/HG FSCs show an ultrahigh energy density (335.8 μWh cm−2) and large areal capacitance (2760 mF cm−2). A self-powered endurance application with the integration of chip-based FSCs is designed to profoundly drive the durable motions of an electric car and walking robot.

Conflict of interest

The authors declare no conflict of interest.

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