SECM Investigation of Carbon Composite Thermoplastic Electrodes - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Analytical Chemistry Année : 2021

SECM Investigation of Carbon Composite Thermoplastic Electrodes

Résumé

Thermoplastic electrodes (TPEs) are carbon composite electrodes consisting of graphite and thermoplastic polymer binder. TPE production is a solvent-based method, which makes it easy to fabricate and pattern into complex geometries, contrary to classical carbon composite electrodes. Depending on the composition (carbon type, binder, and composition ratio), TPEs can give excellent electrochemical performance and high conductivity. However, these TPEs are relatively new electrode materials, and thorough electrochemical characterization is still missing to understand and predict why large differences between TPEs exist. We used scanning electrochemical microscopy (SECM) as a screening tool to characterize TPEs. SECM data treatment based on scanning probe microscopy imaging allows a fast and easy comparison of the numerous images, as well as the optimization of the preparation. Experiments suggest that TPEs behave as a network of interacting microelectrodes made by electrochemically active islands isolated between less active areas. Higher carbon content in TPEs is not always indicative of more uniform electrodes with better electrochemical performances. Using various SECM redox probes, it is possible to select a specific graphite or polymer type for the analyte of interest. For example, TPEs made with COC:3569 are the best compromise for general detection, whereas PMMA:11 μm is better suited for catechol-like polyphenol analysis.
Fichier principal
Vignette du fichier
Berge et al - 2020 - SECM Investigation of Carbon Composite Thermoplastic Electrodes - manuscript_clean.pdf (1.37 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03102181 , version 1 (31-03-2021)

Identifiants

Citer

Kathleen E Berg, Yann R Leroux, Philippe Hapiot, Charles S Henry. SECM Investigation of Carbon Composite Thermoplastic Electrodes. Analytical Chemistry, 2021, 93 (3), pp.1304-1309. ⟨10.1021/acs.analchem.0c01041⟩. ⟨hal-03102181⟩
70 Consultations
103 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More