Here, we report about the synthesis of Cobalt-Copper (CC) mixed oxides prepared by electrodeposition and thermal annealing, and coated with PEDOT:PSS (CCP) for supercapacitor electrodes. The electrodes' morphology and electrochemical performance were investigated by combining XRD, XPS, SEM, cyclic voltammetry, and galvanostatic charge/discharge tests. The initial capacity of the CC electrode was 26 mAh/g at a scan rate of 5 mV/s with a coulombic efficiency of 92 %. The CC electrode featured a capacity retention of 81 % at a constant current density of 1 A/g after 5000 cycles. CCP electrodes slightly reduced the specific capacity but increased both coulombic efficiency and cyclic stability. CCP1 electrode featured a specific capacity of 21 mAh/g at 5 mV/s scan rate with better coulombic efficiency 95 % along with capacity retention of 92.3 % over 5000 cycles. Increasing the amount of PEDOT:PSS lowered the CC electrodes' specific capacity, but significantly improved the capacity retention up to 100 %.
Electrodeposition of Cobalt-Copper Oxides Decorated with Conductive Polymer for Supercapacitor Electrodes with High Stability / Noormohammadi, E; Poli, F; Durante, C; Lunardon, M; Sanjabi, S; Soavi, F. - In: CHEMELECTROCHEM. - ISSN 2196-0216. - ELETTRONICO. - 9:11(2022), pp. e202200102.1-e202200102.11. [10.1002/celc.202200102]
Electrodeposition of Cobalt-Copper Oxides Decorated with Conductive Polymer for Supercapacitor Electrodes with High Stability
Poli, FSecondo
;Soavi, F
Ultimo
2022
Abstract
Here, we report about the synthesis of Cobalt-Copper (CC) mixed oxides prepared by electrodeposition and thermal annealing, and coated with PEDOT:PSS (CCP) for supercapacitor electrodes. The electrodes' morphology and electrochemical performance were investigated by combining XRD, XPS, SEM, cyclic voltammetry, and galvanostatic charge/discharge tests. The initial capacity of the CC electrode was 26 mAh/g at a scan rate of 5 mV/s with a coulombic efficiency of 92 %. The CC electrode featured a capacity retention of 81 % at a constant current density of 1 A/g after 5000 cycles. CCP electrodes slightly reduced the specific capacity but increased both coulombic efficiency and cyclic stability. CCP1 electrode featured a specific capacity of 21 mAh/g at 5 mV/s scan rate with better coulombic efficiency 95 % along with capacity retention of 92.3 % over 5000 cycles. Increasing the amount of PEDOT:PSS lowered the CC electrodes' specific capacity, but significantly improved the capacity retention up to 100 %.File | Dimensione | Formato | |
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