Understanding the energy storage mechanisms of poly(3,4-ethylenedioxythiophene)-coated silicon nanowires by electrochemical quartz crystal microbalance - Labex MATISSE Accéder directement au contenu
Article Dans Une Revue Materials Letters Année : 2019

Understanding the energy storage mechanisms of poly(3,4-ethylenedioxythiophene)-coated silicon nanowires by electrochemical quartz crystal microbalance

Résumé

The capacitive properties of electrodes elaborated from the electrochemical deposition of poly(3,4-ethylenedioxythiophene) (PEDOT) coatings onto chemical vapor deposition (CVD)-grown silicon nanowires (SiNWs) were investigated for supercapacitor applications. A high areal capacitance value of 17 mF cm−2 (50 F g−1) was obtained at a scan rate of 100 mV s−1 in a 3-electrode cell configuration. Furthermore, this 3D hybrid nanostructure was analyzed by electrochemical quartz crystal microbalance (EQCM) to correlate the interfacial ionic exchange mechanisms to their electrochemical performance. It was demonstrated that both anions (BF4−) and cations (TBA+) were simultaneously involved in the charge compensation during the oxidation-reduction scans of cyclic voltammetry measurements.

Domaines

Matériaux Chimie
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Dates et versions

hal-01983413 , version 1 (16-01-2019)

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Tao Lé, Gérard Bidan, Pascal Gentile, Florence Billon, Catherine Debiemme-Chouvy, et al.. Understanding the energy storage mechanisms of poly(3,4-ethylenedioxythiophene)-coated silicon nanowires by electrochemical quartz crystal microbalance. Materials Letters, 2019, 240, pp.59-61. ⟨10.1016/j.matlet.2018.12.119⟩. ⟨hal-01983413⟩
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