期刊
IONICS
卷 28, 期 12, 页码 5581-5598出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-022-04764-4
关键词
Hybrid supercapacitor; Co3O4; Reduced graphene oxide; Polypyrrole; Galvanostatic charge-discharge
资金
- TUBAP [2018-138]
The design and synthesis of symmetric supercapacitor electrodes using micro-nano structured metal oxide and polypyrrole with reduced graphene oxide have shown promising results in terms of specific capacitances, energy and power densities. Different initial feed ratios were tested in 2M and 6M KOH solutions, with the best performance observed with a ratio of 1:5:10 in 2M KOH solution. The study indicates that rGO/Co3O4/PPy symmetric supercapacitors hold great potential for next-generation high-performance supercapacitors.
Symmetric supercapacitor electrode design and synthesis of micro-nano structured metal oxide (Co3O4) and polypyrrole with reduced graphene oxide (rGO) have played an important role in supercapacitor investigations. The characterizations of rGO/Co3O4/PPy nanocomposites were given by FTIR-ATR, SEM-EDX, TGA-DTA, BET surface, and porous analysis and Four-point probe analysis. The symmetric rGO/Co3O4/PPy supercapacitor devices were presented in different initial feed ratios of [rGO](o)/[Co3O4](o)/[Py](o) = 1:5:1; 1:5:2; 1:5:5 and 1:5:10 for 2 M and 6 M KOH solutions. The highest specific capacitances, energy and power densities of C-sp = 896 F x g(-1), E = 31.75 Wh x kg(-1) and P = 11,705 W x kg(-1) for [rGO](o)/[Co3O4](o)/[Py](o) = 1:5:10 in 2 M KOH solution and C-sp = 1370 F x g(-1) for [rGO](o)/[Co3O4](o)/[Py](o) = 1:5:5 and E = 31.43 Wh x kg(-1) and P = 11,600 W x kg(-1) for [rGO](o)/[Co3O4](o)/[Py](o) = 1:5:1 in 6 M KOH solution. The lowest capacitance retention was obtained as 3.69% in 2 M KOH solution for [rGO](o)/[Co3O4](o)/[Py](o) = 1:5:1 after 1000 cycle charge/discharge performances by CV method. Symmetric supercapacitor of rGO/Co3O4/PPy should open up new opportunities for the next-generation high-performance supercapacitors.
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