表面自组装法制备高比容Al_2O_3/TiO_2复合膜
|
摘要
通过提高工作介质氧化膜的介电常数来增加电容器的比容量,是解决铝电解电容器小型化、轻量化常用的方法之一。本研究采用表面自组装法,在铝箔表面引入磺酸基团使铝箔表面的荷电性质发生改变,铝箔与二氧化钛前驱体胶粒间的静电斥力转变为静电引力,从而增加了二氧化钛在铝箔表面的沉积量。经过热处理与阳极氧化后,在铝箔表面形成了高介电常数Al_2O_3/TiO_2复合膜。相对未涂覆TiO_2的阳极铝箔,采用表面自组装法制备的复合膜表面的钛含量增加了30倍,其比容量在400 V耐压下提高了44.26%。本方法制备的大比容量阳极氧化铝箔在铝电解电容器行业有巨大的应用潜力。
For anodized aluminum, the enhancement of the specific capacitance foils by increasing dielectric constant is one of the most common methods to meet the requirements of miniaturization and lightweight of aluminum electrolytic capacitors. In this study, surface self-assembly method was used to introduce sulfonic acid group to graft the surface of aluminum foil for changing its electrical properties. Electrostatic repulsion between surface of aluminum foil and colloidal particles of titanium dioxide was changed to electrostatic forces due to the existence of sulfonic acid group, which dramatically enhanced the deposition of titanium dioxide on the surface of the aluminum foil. After heat treatment and anodic oxidation of aluminum foil, the Al_2O_3/TiO_2 compounds with high dielectric constant on the surface of aluminum foil were prepared successfully. Comparing with those without TiO_2 coating, the content of Ti on the surface of anodized aluminum foil prepared by surface self-assembly method increased by 30 times while the specific capacitance of anodized aluminum foil was enhanced by 44.26% at the withstanding voltage of 400 V. Therefore, anodized aluminum foil with a high specific capacitance prepared by above method exhibits great potential in commercial application of aluminum electrolytic capacitor in the future.
For anodized aluminum, the enhancement of the specific capacitance foils by increasing dielectric constant is one of the most common methods to meet the requirements of miniaturization and lightweight of aluminum electrolytic capacitors. In this study, surface self-assembly method was used to introduce sulfonic acid group to graft the surface of aluminum foil for changing its electrical properties. Electrostatic repulsion between surface of aluminum foil and colloidal particles of titanium dioxide was changed to electrostatic forces due to the existence of sulfonic acid group, which dramatically enhanced the deposition of titanium dioxide on the surface of the aluminum foil. After heat treatment and anodic oxidation of aluminum foil, the Al_2O_3/TiO_2 compounds with high dielectric constant on the surface of aluminum foil were prepared successfully. Comparing with those without TiO_2 coating, the content of Ti on the surface of anodized aluminum foil prepared by surface self-assembly method increased by 30 times while the specific capacitance of anodized aluminum foil was enhanced by 44.26% at the withstanding voltage of 400 V. Therefore, anodized aluminum foil with a high specific capacitance prepared by above method exhibits great potential in commercial application of aluminum electrolytic capacitor in the future.
引文
[1]DU XIAN-FENG,LIN BAI-GE,LI BING,et al.Surface modification of Al foils for aluminum electrolytic capacitor.Advanced Functional Materials,2017,27(11):1–5.
[2]DU XIAN-FENG,XU YOU-LONG.Formation of Al2O3-Ba Ti O3composite thin film to increase the specific capacitance of aluminum electrolytic capacitor.Thin Solid Films,2008,516(23):8436–8440.
[3]Du XIAN-FENG,Xu YOU-LONG.Preparation and electrical properties of an anodized Al2O3-Ba Ti O3 composite film.Journal of the American Ceramic Society,2008,91(7):2360–2363.
[4]DU XIAN-FENG,MEN KAI,XU YOU-LONG,et al.Enhanced capacitance performance of Al2O3-Ti O2 composite thin film via Sol-Gel using double chelators.Journal of Colloid Interface Science,2015,443:170–176.
[5]杨邦朝,冯哲圣,陈金菊.纳米复合高介电常数铝氧化膜生长技术.中国.C23C 18/00.CN1502719.2004.6.19.
[6]GU DE-EN,CHEN JIN-JU,FENG ZHE-SHENG,et al.Aluminum foil composite surface anodic oxidation film studies.Functional materials,2004,35(5):600–602.
[7]CHEN JIN-JU,FENG ZHE-SHENG,JIANG MEI-LIAN,et al.The effect of anodizing voltage on the electrical properties of Al-Ti composite oxide film on aluminum.Journal of Electroanalytical Chemistry,2006,590(1):26–31.
[8]CHEN JIN-JU,FENG ZHE-SHENG,GUO HONG-LEI,et al.Preparation of high dielectric constant composite oxide films for aluminum electrolytic capacitors.Materials Engineering,2006(2):56–60.
[9]CHEN JIN-JU,JIANG MEI-LIAN,FENG ZHE-SHENG,et al.Effects of technologycal parameters on specific capacitance of Al-Ti composite oxide films.Electronic Components and Materials,2005,(8):8–10.
[10]CHEN JIN-JU,YANG BANG-CHAO,JIANG MEI-LIAN,et al.The effect of anodizing temperature on the structure and electrical properties of Al-Ti composite oxide film.Science in China Series E-Engineering&Materials Science,2005,48(6):612–621.
[11]CHEN JIN-JU,GU DE-EN,FENG ZHE-SHENG,et al.Formation of Al-Ti composite oxide films on aluminum by hydrolysis precipitation and anodizing.Journal of Functional Materials,2005,36(3):399–401.
[12]CHEN JIN-JU,FENG ZHE-SHENG,JIANG MEI-LIAN,et al.The effect of anodizing voltage on the electrical properities of Al-Ti composite oxide films on aluminum.Journal of Electronalytical Chemistry,2006,590:26–31.
[13]XU YOU-LONG.Al2O3-(Ba0.5Sr0.5)Ti O3 composite oxide films on etched aluminum foil by Sol-Gel coating and anodizing.Ceramics International,2004,30(7):1741–1743.
[14]DUXIAN-FENG,XU YOU-LONG.Formation of Al2O3-Bi4Ti3O12nanocomposite oxide films on low-voltage etched aluminum foil by Sol-Gel processing.Surface and Coatings Technology,2008,202(10):1923–1927.
[15]DU XIAN-FENG,XU YOU-LONG.Formation of Al2O3-Ba Ti O3nanocomposite oxide films on etched aluminum foil by Sol-Gel coating and anodizing.Journal of Sol-Gel Science and Technology,2008,45(1):57–61.
[2]DU XIAN-FENG,XU YOU-LONG.Formation of Al2O3-Ba Ti O3composite thin film to increase the specific capacitance of aluminum electrolytic capacitor.Thin Solid Films,2008,516(23):8436–8440.
[3]Du XIAN-FENG,Xu YOU-LONG.Preparation and electrical properties of an anodized Al2O3-Ba Ti O3 composite film.Journal of the American Ceramic Society,2008,91(7):2360–2363.
[4]DU XIAN-FENG,MEN KAI,XU YOU-LONG,et al.Enhanced capacitance performance of Al2O3-Ti O2 composite thin film via Sol-Gel using double chelators.Journal of Colloid Interface Science,2015,443:170–176.
[5]杨邦朝,冯哲圣,陈金菊.纳米复合高介电常数铝氧化膜生长技术.中国.C23C 18/00.CN1502719.2004.6.19.
[6]GU DE-EN,CHEN JIN-JU,FENG ZHE-SHENG,et al.Aluminum foil composite surface anodic oxidation film studies.Functional materials,2004,35(5):600–602.
[7]CHEN JIN-JU,FENG ZHE-SHENG,JIANG MEI-LIAN,et al.The effect of anodizing voltage on the electrical properties of Al-Ti composite oxide film on aluminum.Journal of Electroanalytical Chemistry,2006,590(1):26–31.
[8]CHEN JIN-JU,FENG ZHE-SHENG,GUO HONG-LEI,et al.Preparation of high dielectric constant composite oxide films for aluminum electrolytic capacitors.Materials Engineering,2006(2):56–60.
[9]CHEN JIN-JU,JIANG MEI-LIAN,FENG ZHE-SHENG,et al.Effects of technologycal parameters on specific capacitance of Al-Ti composite oxide films.Electronic Components and Materials,2005,(8):8–10.
[10]CHEN JIN-JU,YANG BANG-CHAO,JIANG MEI-LIAN,et al.The effect of anodizing temperature on the structure and electrical properties of Al-Ti composite oxide film.Science in China Series E-Engineering&Materials Science,2005,48(6):612–621.
[11]CHEN JIN-JU,GU DE-EN,FENG ZHE-SHENG,et al.Formation of Al-Ti composite oxide films on aluminum by hydrolysis precipitation and anodizing.Journal of Functional Materials,2005,36(3):399–401.
[12]CHEN JIN-JU,FENG ZHE-SHENG,JIANG MEI-LIAN,et al.The effect of anodizing voltage on the electrical properities of Al-Ti composite oxide films on aluminum.Journal of Electronalytical Chemistry,2006,590:26–31.
[13]XU YOU-LONG.Al2O3-(Ba0.5Sr0.5)Ti O3 composite oxide films on etched aluminum foil by Sol-Gel coating and anodizing.Ceramics International,2004,30(7):1741–1743.
[14]DUXIAN-FENG,XU YOU-LONG.Formation of Al2O3-Bi4Ti3O12nanocomposite oxide films on low-voltage etched aluminum foil by Sol-Gel processing.Surface and Coatings Technology,2008,202(10):1923–1927.
[15]DU XIAN-FENG,XU YOU-LONG.Formation of Al2O3-Ba Ti O3nanocomposite oxide films on etched aluminum foil by Sol-Gel coating and anodizing.Journal of Sol-Gel Science and Technology,2008,45(1):57–61.