聚合条件对PEDOT微观结构及叠层铝电性能的影响
Effects of polymerization conditions on microstructure of PEDOT and electrical properties of laminated aluminum capacitors
陈绪鑫 1陈琛 1袁家印 1王艳1
作者信息
- 1. 中国振华(集团)新云电子元器件有限责任公司,贵州 贵阳 550018
- 折叠
摘要
为了获得致密的PEDOT层,研究了不同聚合条件对PEDOT生长规律、微观结构、厚度及叠层铝电容器电性能的影响.结果表明,相对于25%氧化剂浓度,35%氧化剂浓度下PEDOT生长更快,微观呈长链网状结构,厚度更厚,电参数更优;氧化剂在40℃条件下干燥易形成树枝状晶体,有利于PEDOT更好地覆盖于铝箔表面,厚度更均匀,电参数更好;增加水洗次数能让PEDOT在铝箔腐蚀孔内填充更好,微观结构更致密,厚度一致性更好,容量引出更高,并降低成品的损耗及ESR.综合考虑以上条件对PEDOT的影响,将一次完整的聚合分为内层填充、表面生长及厚度增加三个阶段,形成了PEDOT最佳生长模型,解决了批量生产时PEDOT层较薄、生长不致密等问题,提高叠层铝电容器的电性能及可靠性.
Abstract
In order to obtain dense PEDOT layers,the effects of different polymerization conditions on the growth,microstructure and thickness of PEDOT,and the electrical properties of laminated aluminum capacitors were stud-ied.The results showed that compared with 25%oxidant concentration,the growth of PEDOT at 35%oxidant con-centration was faster,the microstructure was long chain network,the thickness was thicker,and the electrical param-eters were better.When the oxidant was dried at 40℃,it was easy to form dendritic crystals,which was favorable for PEDOT to cover the aluminum foil surface,with more uniform thickness and better electrical parameters.Increas-ing the water rinse times could make PEDOT better fill the aluminum foil corrosion holes,having denser microstruc-ture,better thickness consistency,higher capacity extraction,and lower loss and ESR of finished products.Consider-ing the influence of the above conditions on PEDOT,a complete polymerization was divided into three stages;inner layer filling,surface growth and thickness increase.On this basis,the optimal growth model of PEDOT was formed,solving the problems of thin and low-density PEDOT layer in batch production,and improving the electrical per-formance and reliability of laminated aluminum capacitors.
关键词
叠层铝电容器/氧化剂浓度/枝晶/水洗次数/PEDOT/生长模型Key words
laminated aluminum capacitor/oxidant concentration/dendrite/water rinse times/PEDOT/growth model引用本文复制引用
出版年
2024
NETL
NSTL
万方数据