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Sol–gel synthesis of Co-doped Cu2O nanostructures for high-performance asymmetric supercapacitors
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DOI：10.1016/j.materresbull.2026.114361.png)
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Abstract
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• Cu2-xCoxO nanocrystals (x = 3–7% Co) synthesized by sol–gel and analyzed by XRD, SEM, HRTEM, BET, XPS, FTIR & Raman. • Structural analysis reveals higher surface area, oxygen vacancies, and mixed valence states (Cu+/Cu2+, Co2+/Co3+). • Optimized 5% Co-doped Cu₂O deliver specific capacitance of 454 Fg⁻¹ at 1 Ag⁻¹ with 99.6 % efficiency after 5000 cycles. • COB-5//AC ASC delivers 58 Wh kg⁻¹, 593 W kg⁻¹, 81% retention after 5000 cycles, and successfully powers multicolor LEDs.
Keywords:
Cuprous oxide
Pseudocapacitors
Cobalt doping
Sol-gel technique
Oxygen vacancy
Asymmetric supercapacitor
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5.7
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1.3W
Citations:
2.9W
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