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Title

Chitin as a universal and sustainable electrode binder for electrochemical capacitors

Authors

[ 1 ] Instytut Chemii i Elektrochemii Technicznej, Wydział Technologii Chemicznej, Politechnika Poznańska | [ P ] employee

Scientific discipline (Law 2.0)

[6.5] Chemical sciences

Year of publication

2023

Published in

Journal of Power Sources

Journal year: 2023 | Journal volume: vol. 553

Article type

scientific article

Publication language

english

Keywords
EN
  • Biopolymers
  • Polysaccharide
  • Ionic liquid
  • Dimethyl sulfoxide
  • Supercapacitor
  • Activated carbon
Abstract

EN We have introduced chitin-bound, activated carbon-based electrode materials dedicated to supercapacitors operated on different electrolyte environments. As a chitin solvent, we have used our original mixture system containing an ionic liquid (1-ethyl-3-methylimidazolium acetate) and a viscosity reducing agent (dimethyl sulfoxide). The prepared electrode material has been tested in terms of morphological, physicochemical, and electrochemical properties. The most attention has been paid to studying the electrochemical performance of composite electrodes in the most common types of liquid electrolytes, i.e. aqueous, organic and ionic liquid electrolytes. A comparative study of the assembled supercapacitors has been made in terms of specific capacitance, charge propagation, cycle stability, and power/energy density. As was demonstrated, the proposed electrode binder material features a very attractive attribute appearing as versatility in terms of employed electrolyte. Regardless of the type of used electrolyte, chitin-bound electrodes display high specific capacitance (128-142 F g-1), good rate capability (up to 92% capacitance retention under 15 A g-1), and excellent cycle stability (75-99% of an initial capacitance). Taking into account the natural origin of chitin and the excellent electrochemical efficiency of tested devices, it appears that synthesized electrode materials represent a promising and green alternative for the development of environmentally benign supercapacitors.

Date of online publication

31.10.2022

Pages (from - to)

232300-1 - 232300-10

DOI

10.1016/j.jpowsour.2022.232300

URL

https://www.sciencedirect.com/science/article/pii/S0378775322012770

Comments

Article number: 232300

License type

CC BY (attribution alone)

Open Access Mode

open journal

Open Access Text Version

final published version

Release date

31.10.2022

Date of Open Access to the publication

at the time of publication

Full text of article

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Access level to full text

public

Ministry points / journal

140.0

Impact Factor

9.794 [List 2021]

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