Pit growth behaviour of aluminium under galvanostatic control

Ôno, Shôji; Habazaki, H.

doi:10.1016/j.corsci.2011.06.024

Cited by 27 publications

(12 citation statements)

References 32 publications

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“…However, when cycle number exceeds 12, surface of the sample began to disintegrate thus specific surface area was not increased. Since specific surface area of the anode Al foil for electrolytic capacitor is up to 200 [8], the present process, which attained specific surface area over 300 under anodization at 20 V, is advantageous for the preparation of Al electrolytic capacitor with a maximum capacitance.…”

Section: Methodsmentioning

confidence: 99%

“…On the other hand, in the case of the Al foil used in capacitors driven at relatively low voltages, electrochemical etching using alternating current (AC) has been adopted [5][6][7]. This process yields fine porous structures with specific surface area up to 200 [8]. As a candidate process for the formation of nanoporous metals, the selective elution of a dissolvable component from an alloy has been widely employed.…”

Section: Introductionmentioning

confidence: 98%

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Enlargement of surface area of Al by electrochemical insertion and deinsertion of Li

Nishio

Yanagishita

Yoshida

et al. 2015

Electrochemistry Communications

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Enlargement of surface area of Al by electrochemical insertion and deinsertion of Li

Nishio

Yanagishita

Yoshida

et al. 2015

Electrochemistry Communications

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“…Various etching technologies have been developed to fabricate high surface area electrodes for aluminum electrolytic capacitors [4][5][6][7][8]. Among these technologies, Direct current (DC) etching in different solutions at temperatures greater than 60°C has been widely adopted for the fabrication of anode aluminum foils for high-voltage applications [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Effect of tunnel structure on the specific capacitance of etched aluminum foil

Peng

Liang

et al. 2014

Int J Miner Metall Mater

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The morphology of etched aluminum foil was observed using scanning electron microscopy, which led to the establishment of a cylindrical model and two merged models, considering the fixed weight loss of etching. The maximum of specific capacitance and the corresponding optimum values for tunnel sizes at various anodization voltages were predicted. The increased size distribution and taper of tunnels were demonstrated to decrease the specific capacitance, whereas the addition of polymeric additive into the tunnel widening solution was demonstrated to increase the capacitance. The formation of merged tunnels on the etched aluminum surface, irrespective of the presence of row-merged tunnels or cluster-merged tunnels, resulted in a dramatic decrease in the specific capacitance. It is concluded that, enhancing the uniformity of tunnel size and distribution and avoiding the formation of merged tunnels are the effective approach to achieving the higher capacitance for the tunnel etched and formed aluminum foil.

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“…electrolytic graining or electrograining is a process used for the creation of a uniformly pitted morphology on aluminium surfaces. Electrograining can increase the specific area of a smooth aluminium foil by up to a factor of 200 [Ono & Habazaki, 2011, Dyer & Alwitt 1981. The process is industrially applied in lithographic printing plates, where a larger surface area is necessary in order to enhance the water retentive properties of the aluminium and to improve the adhesion of the photosensitive coating which is deposited after electrograining and anodising of the aluminium substrate.…”

Section: Ac Electrograining Mechanismmentioning

confidence: 99%