Volume 46, Issue 12 pp. 17056-17067
RESEARCH ARTICLE

Multicomponent doped hierarchically porous carbon derived from natural polyelectrolyte for high-performance supercapacitors

Tao Lyu

Tao Lyu

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China

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Shiying Lin

Shiying Lin

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China

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Lanlan Mo

Lanlan Mo

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China

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Feijun Wang

Corresponding Author

Feijun Wang

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China

Beijing Engineering Research Centre of Cellulose and Its Derivatives, Beijing, China

Correspondence

Feijun Wang, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.

Email: [email protected]

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Ziqiang Shao

Ziqiang Shao

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China

Beijing Engineering Research Centre of Cellulose and Its Derivatives, Beijing, China

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First published: 15 July 2022
Citations: 3

Summary

Natural polyelectrolyte complex has designable structure, unique advantages of composite and strong intermolecular or intramolecular force without chemical cross-linking agents, showing the advantages of good biodegradability and low toxicity. This work reports an application research of natural polyelectrolyte in energy storage device. A multi-doped hierarchically porous carbon is fabricated from polyelectrolyte of sodium lignosulfonate and chitosan and used as electrode material of supercapacitor. The material characterization reveals its large specific surface area of 1768 m2 g−1, pore volume of 0.94 cm3 g−1 with optimum 3D porous structure, and high heteroatom (oxygen, nitrogen, and sulfur) concentration. Benefit from these, the electrodes it made exhibit 354 F g−1 specific capacitance at 1 A g−1 current density, outstanding rate retention of 82.9% at a testing environment of 20 A g−1, and 97.8% capacitance retention in 3 M KOH electrolyte after 10 000 cycles. Using this material, all-solid symmetric supercapacitor devices show 30.11 Wh kg−1 energy density at 520.88 W kg−1 power density and retains 20.90 Wh kg−1 at 1.03 kW kg−1. These remarkable electrochemical performances prove the promising porous carbon in this work as electrode material with excellent performance for supercapacitors.

CONFLICT OF INTEREST

No potential conflict of interest was reported by the authors.

DATA AVAILABILITY STATEMENT

All data generated or analyzed during this study are included in this published article.

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