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Article

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Title

Chitin and cellulose as constituents of efficient, sustainable, and flexible zinc-ion hybrid supercapacitors

Authors

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

Scientific discipline (Law 2.0)

[7.6] Chemical sciences

Year of publication

2023

Published in

Sustainable Materials and Technologies

Journal year: 2023 | Journal volume: vol. 38

Article type

scientific article

Publication language

english

Keywords
EN
  • zinc-ion hybrid supercapacitor
  • biopolymers
  • polysaccharides
  • ionic liquids
  • gel electrolytes
  • binders
  • pouch cells
Abstract

EN A zinc-ion hybrid supercapacitor (ZIHS) is a prospective energy storage device featuring cost-effectiveness, operational safety, environmental friendliness, high-power performance, and satisfied energy density. The sustainability of this ZIHS technology is even improved by introducing biopolymer constituents into the cell construction. Herein, efficient, sustainable, and flexible ZIHSs employing polysaccharide (chitin- or cellulose-based) components are developed. Using green ionic liquid solvents, biopolymer-bound, activated carbon-based cathode materials and hydrogel biopolymer electrolytes containing conductive zinc salts are obtained. According to systematical characterization results, the prepared materials possess favorable functional properties. Biopolymer binders provide homogeneity and integrity within the electrode network and high adhesion to the surface of the current collector. Depending on the type of zinc salt, hydrogel biopolymer electrolytes display high ionic conductivity (up to 46 mS cm-1), expanded electrochemical stability window (up to ca. 2.8 V), and zinc dendrites growth suppression. Biopolymer components assembled with zinc foil electrodes operate efficiently in both coin and pouch ZIHS cell configurations, providing satisfactory energy (45-50 Wh kg−1) and high power (10-20 kW kg−1) density combined with excellent cycle stability. Moreover, these ZIHS pouch-type devices exhibit superior durability and flexibility, withstanding mechanical stress up to 150° bending states with at least 90 % of capacitance retention. It suggests a prospect for their application in wearable electronics.

Date of online publication

26.09.2023

Pages (from - to)

e00726-1 - e00726-16

DOI

10.1016/j.susmat.2023.e00726

URL

https://www.sciencedirect.com/science/article/pii/S2214993723001616

Comments

Article number: e00726

Ministry points / journal

200

Impact Factor

9,6 [List 2022]

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