Journal
MODERN PHYSICS LETTERS B
Volume 37, Issue 13, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217984923500252
Keywords
CoWO4; carambola-like morphology; high specific capacity; supercapacitor; microwave assistance
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A structured carambola-like CoWO4 was synthesized using a microwave-assisted hydrothermal method with urea and NH4F. The as-obtained CoWO4 exhibited a large specific surface area, high dispersion, and self-selected orientation of crystal growth. Electrochemical tests demonstrated high specific capacity, low internal resistance, and excellent cycle stability, suggesting that CoWO4 has great potential as a hybrid supercapacitor electrode material. This work also provides a new solution for improving the electrochemical performance of CoWO4-based hybrid supercapacitor materials by regulating their morphology.
A structured carambola-like CoWO4 was fast prepared by a microwave-assisted hydrothermal method with the help of urea and NH4F. Physical characterization indicated that the as-obtained CoWO4 displayed a large specific surface area, high dispersion and self-selected orientation of crystal growth. Further electrochemical tests presented a high specific capacity of 492.0 C.g(-1) at 1 A.g(-1), low internal resistance and excellent cycle stability as 137.3% capacity maintenance after 8000 cycles at 20 A.g(-1). These excellent electrochemical properties for the as-obtained material indicate that CoWO4 has great potential as hybrid supercapacitor electrode materials. This work also provides a new and effective solution for regulating the morphology of CoWO4-based hybrid supercapacitor materials to further improve the electrochemical performance.
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