电容
材料科学
电极
超级电容器
电场
多物理
光电子学
双层电容
双电层电容器
循环伏安法
介电谱
电容器
电气工程
电化学
电压
化学
物理
工程类
有限元法
物理化学
热力学
量子力学
作者
Farheen Nasir,Mohammad Ali Mohammad
出处
期刊:IEEE Access
[Institute of Electrical and Electronics Engineers]
日期:2020-02-06
卷期号:8: 28367-28374
被引量:8
标识
DOI:10.1109/access.2020.2972080
摘要
Electric Double Layer Capacitor (EDLC) holds the highest share of commercial supercapacitor market. However, it has been proven that current Helmholtz, Gouy-Chapman and Stern models do not provide comprehensive explanation for energy storage mechanism in EDLC. In this work the effects of interdigitated EDLC design on capacitance of flexible laser scribed interdigitated microsupercapacitor (LSG-MSC) are studied. Three design parameters are tested, (1) current collector-electrode interaction, (2) electrode aperture, and (3) distance between parallel electrodes. Noticeable change was observed in the total capacitance upon change in LSG-MSC design which was analyzed in detail using cyclic voltammetry, electrochemical impedance spectroscopy and electrostatic simulation using COMSOL Multiphysics. It was found that in addition to electric double layer capacitance, an electric field was generated between electrodes and between electrode and current collector which led to small electrostatic capacitance between them. This electric field was also found to cause disturbance in double layer formation at the electrode thus causing change in the overall capacitance as the design parameters were varied.
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