超高压工作电解液闪火电压提升机理及应用研究  

Enhancing mechanism of sparking voltage in ultra-high voltage working electrolyte and its application

作　　者：李焱根 贾明 艾燕 艾亮 李劼 

机构地区：[1]中南大学冶金与环境学院,湖南长沙410083 [2]湖南艾华集团股份有限公司,湖南益阳413000 [3]艾华集团博士后科研流动站协作研发中心,湖南益阳413000

出　　处：《电子元件与材料》2018年第1期28-34,共7页Electronic Components And Materials

基　　金：工信部工业转型升级强基工程专项资助(0714-EMTC02-5271);湖南省战略性新兴产业科技攻关项目(2015GK1045)

摘　　要：电解液是铝电解电容器的关键组元,其性能特征直接决定了电容器的性能发挥。本文通过傅里叶红外光谱(IR)、阳极氧化曲线等研究了电解液电导率和水含量对铝电解电容器用羧酸铵盐体系电解液性能的影响,并探讨了相关作用机理。研究结果表明:电解液电导率是影响闪火电压大小的重要因素,闪火电压随电导率的降低呈非线性增加,电导率降低到(500~700)×10^(–6) S/cm时,闪火电压可高达650 V以上;水含量仅影响电解液的氧化效率,水含量越高,其氧化效率越高。通过将电导率调控至668×10^(–6)S/cm,水含量(质量分数)调控至3.62%,开发了适用于600 V超高压铝电解电容器的电解液,且电容器85℃寿命长达3000 h。Electrolyte is a key component of aluminum electrolytic capacitors, its performance characteristicsdirectly determine the performance of the capacitor. The effect of electrolyte conductivity and water content on theperformance of the electrolytic solution of carboxyl ammonium salt system for aluminum electrolytic capacitors wasstudied by Fourier transform infrared spectroscopy （IR）, anodic oxidation curve and so on, and the related mechanismwas discussed. The results show that the conductivity of the electrolyte is an important factor affecting the sparkingvoltage, and the sparking voltage increases nonlinearly with the decrease in conductivity. When the conductivity isreduced to （500~700）×10–6 S/cm, the sparking voltage can be as high as 650 V or more. The water content in theelectrolyte only affects the oxidation efficiency of the electrolyte. The higher the water content, the higher the oxidationefficiency of the electrolyte. The electrolyte for 600 V ultra-high voltage aluminum electrolytic capacitor is developed byadjusting the conductivity to 668×10–6S/cm and controlling the water content （mass fraction） to 3.62%. The life of thecapacitor that using the electrolyte can be up to 3000 h at 85 ℃.

关 键 词：电解液 闪火电压 电导率 水含量 超高压 电容器 

分 类 号：TM53[电气工程—电器]