| Autor: |
Thiet, Duong V., Tung, Doan T., Tam, Le T. T., Dung, Ngo T., Tam, Le T., Nam, Pham T., Trang, Nguyen T. T., Vernardou, Dimitra, Le, Top K., Tam, Nguyen V., Lam, Tran D., Lu, Le T. |
| Předmět: |
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| Zdroj: |
New Journal of Chemistry; 8/21/2023, Vol. 47 Issue 31, p14885-14893, 9p |
| Abstrakt: |
For the purpose of expanding the working potential window and reducing the self-discharge for a Zn-ion hybrid supercapacitor, a positive electrode (cathode) of the Mn–Co-sulfide–polyaniline (MCS–PANi) composite coated on porous graphite paper was prepared using the reverse voltage pulse electrodeposition method. The electrode first achieved a high specific capacitance of 1048.8 F g−1 at a scan rate of 5 mV s−1 in the 1 M ZnSO4 and 0.1 M MnSO4 electrolyte solution. The Zn negative electrode (anode) was modified by organic fatty alcohol additives to reduce oxidation and dendrite growth. A hydrophilic modified polypropylene (PP) nonwoven fabric was used as a separator. The MCS–PANi-Zn-ion hybrid supercapacitor (MPZHSC) exhibited a very wide potential window of 2 V in aqueous electrolytes, a high specific capacitance value of 586.7 F g−1 at a scan rate of 5 mV s−1, an excellent durability of 98.3% after 11 232 cycles and a low self-discharge rate, retaining over 60% of its initial voltage value after 7 days. In addition, a device with a small active area of 2 cm2 can be used to light a 2.5 W LED module for about 15 min, suggesting MPZHSC's potential practical applications. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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