文献类型：期刊文献

英文题名：Modelling specific capacitance of DC etched aluminium foil for aluminium electrolytic capacitor

作者：Zhu, S. Q.[1];Ban, C. L.[2];Tao, X. Q.[2];Chen, W. Y.[2];Jiang, L. J.[3]

第一作者：Zhu, S. Q.

通讯作者：Ban, CL[1]

机构：[1]Liaocheng Univ, Sch Comp Sci, Liaocheng 252059, Peoples R China;[2]Liaocheng Univ, Sch Mat Sci & Engn, Liaocheng 252059, Peoples R China;[3]Xinxiang Univ, Coll Phys & Elect Engn, Xinxiang 453003, Peoples R China

第一机构：Liaocheng Univ, Sch Comp Sci, Liaocheng 252059, Peoples R China

通讯机构：[1]corresponding author), Liaocheng Univ, Sch Mat Sci & Engn, Liaocheng 252059, Peoples R China.

年份：2015

卷号：26

期号：9

起止页码：6750-6756

外文期刊名：JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS

收录：;EI(收录号：20152300917013);Scopus(收录号：2-s2.0-84938960264);WOS:【SCI-EXPANDED(收录号:WOS:000359454500057)】；

基金：The work is financially supported by the Natural Science Foundation of Shandong Province, China (Grant No. ZR2012EMM007), Research Key Project of Science and Technology of Education Bureau of Henan Province, China (14A140030) and Innovation Talants Program of Science and Technology of Institution of Higher Education of Henan Province, China (Grant No. 14HASTIT044).

语种：英文

外文关键词：Aluminum foil - Aluminum metallography - Electrochemical etching - Electrolytic capacitors - Morphology - Scanning electron microscopy

摘要：The morphology of etched aluminum foil was observed using scanning electron microscopy, which led to the establishment of a cubic tunnel etch model and a trench tunnel etch model. With these two modes, the theoretical maximum specific capacitance values for the anode foil used in aluminum electrolytic capacitors were calculated with Matlab at various formation voltages. The corresponding optimum values for tunnel size, density, distribution and geometrical shape were also given as a function of oxide thickness. The experimental and theoretical capacitance values are compared. It is concluded that the theoretical maximum specific capacitance for trench etch tunnel model is higher than that for cubic etch tunnel one at fixed formation voltage. Promoting tunnel-merging in rows rather than in clusters is preferred during electro-etching process, leading to formation of trench tunnels on the Al foil. For high formation voltages, measured capacitances approach the optimum values and enlargement of surface area by electrochemical etching was faced with the limit. But for low formation voltages, the experimental capacitance value obtained is far behind the optimized one and the tunnels size, distribution, shape and density must be optimized to achieve high capacitance.