| WANG Wenbo,KANG Jun,LI Nian,PU Jingwen,KONG Mingguang,WANG Zhenyang.Preparation and Capacitive Properties of Laser-assisted Ordered Porous Tantalum Foils[J],53(20):198-207 |
| Preparation and Capacitive Properties of Laser-assisted Ordered Porous Tantalum Foils |
| Received:November 02, 2023 Revised:February 22, 2024 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2024.20.018 |
| KeyWord:laser etching technology electrochemical corrosion tantalum foil with ordered hole array tantalum capacitor capacitive performance |
| Author | Institution |
| WANG Wenbo |
Institute of Solid-state Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei , China;University of Science and Technology of China, Hefei , China |
| KANG Jun |
Institute of Solid-state Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei , China;University of Science and Technology of China, Hefei , China |
| LI Nian |
Institute of Solid-state Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei , China |
| PU Jingwen |
Institute of Solid-state Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei , China |
| KONG Mingguang |
Institute of Solid-state Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei , China |
| WANG Zhenyang |
Institute of Solid-state Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei , China |
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| Abstract: |
| With the rapid development of science and technology, tantalum electrolytic capacitors have become indispensable micro-electronic components in aerospace, automatic control precision equipment, computers, and other high-end fields. However, tantalum capacitors have the characteristics of high capacitance, voltage resistance, oxidation resistance, low equivalent series resistance and sustainability, which are related to the structural characteristics of tantalum anode materials. At present, the preparation of tantalum anode materials with high specific surface area by the powder sintering process under high temperature (usually greater than 1 250 ℃) is a common means of industrial production, but the disordered pore structure generated during the preparation process causes the increase of defects inside the anode material, thereby reducing its specific capacity and voltage resistance characteristics. In addition, electrochemical corrosion technology has gradually become a common means for post-treatment of commercial tantalum foils, aiming to achieve extensive growth of micropores on the surface of tantalum foils, so as to improve the capacitance of tantalum foils. Due to the increase of the active site, the obtained porous tantalum can effectively promote the electrical storage reaction. However, this method is still porous uncontrolled, which is often not the ordered pore we need. Therefore, it is urgent to develop a simple and reliable method to improve the performance of tantalum anode materials by constructing ordered pores. |
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