o-Phthalaldehyde cross-linked chitosan membrane as a quasi-solid-state electrolyte for supercapacitors
[ 1 ] Instytut Chemii i Elektrochemii Technicznej, Wydział Technologii Chemicznej, Politechnika Poznańska | [ P ] employee
2024
scientific article
english
- chitosan
- o-phthalaldehyde
- quasi-solid-state electrolyte
- hydrogel electrolyte
- electric double-layer capacitor
- supercapacitor
EN This study, reports a stepwise formation method of a chitosan membrane cross-linked with o-phthalaldehyde and its use as a polymer matrix in the quasi-solid-state-electrolyte-based supercapacitor. The proposed method of cross-linking in chitosan solution and evaporation of the solvent allowed us to obtain a homogeneous and durable chitosan-o-phthalaldehyde membrane, which, after dipping in a 2M Li2SO4 aqueous solution, formed the quasi-solid-state-electrolyte (CS/OPA-QSSE). The prepared CS/OPA-QSSE was then used in an electric double-layer capacitor (EDLC) cell to study its electrochemical properties. The electrochemical performance of the EDLC cell was determined by electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic charging/discharging techniques. The results show that the EDLC cell with CS/OPA-QSSE can be recognized as a fully functional and efficient device. The specific capacitance values calculated for the CS/OPA-QSSE EDLC (up to 115 F g–1) always surpassed the reference cell based on a commercial glass fiber separator. Therefore, the proposed chitosan modification can be considered as a future alternative for other polysaccharide-based materials for electrochemical use.
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CC BY (attribution alone)
open journal
final published version
at the time of publication
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