Measurement of internal charge distribution of electric double layer capacitor by PEA method
Measurement of internal charge distribution of electric double layer capacitor by PEA method
复制标题
PEA法测量双电层电容器内部电荷分布
DOI：
10.1109/ceidp.2004.1364196
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Toshio Bouno
中科院分区：
文献类型：
--
作者：
D. Tashima;Y. Hirata;M. Otsubo;C. Honda;Toshio Bouno
本研究将电解液分别注入经真空脱气处理的双电层电容器（EDLC）和直接在空气中进行脱气处理的双电层电容器（EDLC）中，并利用脉冲电声（PEA）方法研究了EDLC内部电荷分布。研究发现，在真空中注入脱气处理后的电解液，其体积电荷密度是直接在空气中注入的7倍左右。认为真空脱气可以向极化微孔电极注入足够的电解液，节省更多的电荷。此外，还研究了材料中的声速。据了解，静电容量随着外加电压的升高而逐渐增加。静电容量分别用PEA法和能量转换法估算。两种方法的结果是一致的。
In this study, electrolyte was injected into an electric double layer capacitor (EDLC) after degas treatment in vacuum and directly in air, respectively, and the internal charge distribution in the EDLC was examined by the pulsed electro acoustic (PEA) method. It was found that volume charge density in the case of injection of electrolyte after degas treatment in vacuum is about seven times compared with that injected directly in air. It was thought that sufficient electrolyte can be injected into the polarized microporous electrode by degas in vacuum and more electric charge can be saved. Moreover, the sound velocity in the material is examined. It has been understood that electrostatic capacity gradually increases with the rise of applied voltage. The electrostatic capacity was estimated by the PEA method and the energy conversion method, respectively. The results from two methods are in good agreement.