TY - JOUR
T1 - Effects of current density on anodizing behavior, micro-structure, and electrical properties of ZrO2-coated Al foils
AU - Zhang, Kaiqiang
AU - Park, Sang Shik
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/5/31
Y1 - 2019/5/31
N2 - The effect of current density on the anodizing behaviors, micro-structure, and electric properties of ZrO2-coated Al samples is reported. The experiment is performed by coating ZrO2 on the surface of etched Al foils and anodizing in 2-methyl-1,3-propanediol (MPD)-boric acid electrolyte at current densities of 0.01, 0.05, and 0.10 A/cm2 at 700 V. The samples are characterized using X-ray diffraction, field emission transmission electron microscopy, and electrochemical impedance spectroscopy. Marked enhancements in anodization rate, and specific capacitance are achieved by the increase in current density during anodization. A maximum enhancement of 14.8% in specific capacitance and increase of 25.7% in charging ability are realized by anodizing at 0.10 A/cm2. The specific capacitance is finally increased by 54.3% after ZrO2 coating and current density modification. This work provides a valuable forerunner for research into the effect of current density on the anodizing behavior, micro-structure, and electric properties of valve metal oxide-coated Al foils.
AB - The effect of current density on the anodizing behaviors, micro-structure, and electric properties of ZrO2-coated Al samples is reported. The experiment is performed by coating ZrO2 on the surface of etched Al foils and anodizing in 2-methyl-1,3-propanediol (MPD)-boric acid electrolyte at current densities of 0.01, 0.05, and 0.10 A/cm2 at 700 V. The samples are characterized using X-ray diffraction, field emission transmission electron microscopy, and electrochemical impedance spectroscopy. Marked enhancements in anodization rate, and specific capacitance are achieved by the increase in current density during anodization. A maximum enhancement of 14.8% in specific capacitance and increase of 25.7% in charging ability are realized by anodizing at 0.10 A/cm2. The specific capacitance is finally increased by 54.3% after ZrO2 coating and current density modification. This work provides a valuable forerunner for research into the effect of current density on the anodizing behavior, micro-structure, and electric properties of valve metal oxide-coated Al foils.
KW - Anodization current
KW - Capacitor
KW - Specific capacitance
KW - Withstanding voltage
KW - Zr-Al-O composite layer
UR - http://www.scopus.com/inward/record.url?scp=85044542801&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2018.01.119
DO - 10.1016/j.apsusc.2018.01.119
M3 - Article
AN - SCOPUS:85044542801
SN - 0169-4332
VL - 477
SP - 44
EP - 49
JO - Applied Surface Science
JF - Applied Surface Science
ER -