| Autor: |
Pesqueira, Camila, Hryniewicz, Bruna M., Klobukoski, Vanessa, Weheabby, Saddam, Kanoun, Olfa, Rüffer, Tobias, Pašti, Igor A., Vidotti, Marcio |
| Předmět: |
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| Zdroj: |
ChemElectroChem; Oct2024, Vol. 11 Issue 19, p1-10, 10p |
| Abstrakt: |
Enhancing the supercapacitors' performance relies on the increased capacitance and voltage window, which are the current key challenges for developing new materials. In this study, the mononuclear NiII‐bis(oxamato) complex ([nBu4N]2[Ni(opba)], 1) has been synthesized and used as a template in polypyrrole (PPy) based conductive polymer as a novel electrode material for supercapacitor applications. The surface and structural properties of PPy and PPy/1 electrodes were studied using SEM and TEM to elucidate their interactions. The results of characterization techniques revealed that complex 1 altered the morphology, creating a prominent three‐dimensional globular structure in the PPy/1 hybrid material without significant chemical modification. The electrochemical properties of PPy and PPy/1 were investigated by CV, EIS, and GCD analyses. The PPy/1 electrode demonstrated intense pseudocapacitive behavior, showing a significantly widened potential window and increased current compared to the PPy electrode, resulting in enhanced energy storage capacity within the material. This improvement was evaluated by testing a symmetric supercapacitor in a coin cell architecture with an alginate‐based gel acting as both electrolyte and separator. The maximum specific cell capacitance reached 41.6 F g−1 at a current density of 0.2 A g−1, with a remarkable capacity retention of 97 % after 1000 galvanostatic charge/discharge cycles. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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