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Article

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Title

Utilizing kraft lignin–derived hard carbon as an innovative bio‑electrode in electrochemical capacitors

Authors

[ 1 ] Instytut Chemii i Elektrochemii Technicznej, Wydział Technologii Chemicznej, Politechnika Poznańska | [ 2 ] Instytut Napędów i Lotnictwa, Wydział Inżynierii Lądowej i Transportu, Politechnika Poznańska | [ 3 ] Politechnika Poznańska | [ P ] employee | [ S ] student

Scientific discipline (Law 2.0)

[2.7] Civil engineering, geodesy and transport
[7.6] Chemical sciences

Year of publication

2024

Published in

Ionics

Journal year: 2024 | Journal volume: vol. 30 | Journal number: iss. 9

Article type

scientific article

Publication language

english

Keywords
EN
  • Lignin · Biocarbon · Cyclic voltammetry · Carbonization · Capacitor
Abstract

EN In recent years, biomaterials are gaining popularity due to high need to make energy storage devices greener and safer. After the carbonization process, lignin has a slightly larger specific surface and a porous structure, which can provide a significant electrochemical double-layer capacity. When combined with kraft lignin as a binder, which helps maintain the structural integrity of the electrode, the efficient use of the active material can be enhanced. The binder facilitates better dispersion of carbonized lignin particles, reducing agglomeration and ensuring greater availability of active sites for electrolyte ions. The aim of this work is to present a novel lignin-based hard carbon as an electrode material for applications in electrochemical capacitors. To this end, a detailed physicochemical and electrochemical analysis was conducted. Kraft lignin was carbonized at temperatures ranging from 600 to 1000 °C. The resulting material is characterized by thermal stability, a low polydispersion index (PDI), and mesoporosity. Thermogravimetric (TG) analysis was used to determine changes in structure, while functional groups were analyzed using Fourier-transform infrared spectroscopy (FTIR). In electrochemical applications, the material exhibits high cyclic stability and no redox reactions, with the primary mechanism of charge accumulation being based on the electrochemical double layer. Additionally, low resistances contribute to improved charge storage.

DOI

10.1007/s11581-024-05770-4

URL

https://link.springer.com/content/pdf/10.1007/s11581-024-05770-4.pdf

License type

CC BY (attribution alone)

Open Access Mode

open journal

Open Access Text Version

final published version

Date of Open Access to the publication

at the time of publication

Ministry points / journal

70

Impact Factor

2,4 [List 2023]

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