.png){kind=icon}
返回
Overcoming diffusion limitations in supercapacitors using layered electrodes
.png){kind=icon}
OA
AI
DOI：10.1016/j.jpowsour.2019.04.107.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
The impact of multi-layered electrode microstructures on the dynamic capacitance of electrochemical double layer supercapacitors is investigated. An electrochemical model that describes ion diffusion and double layer dynamics across the layered electrodes is first developed and then matched to experimental data. With TiO2 particulate and carbon nanotube layered electrodes, two knee frequencies were observed in the real and imaginary capacitance plots in both experiment and model simulations. These two knee frequencies resulted in an increase in real capacitance at high frequencies (omega approximate to 10(0) - 10(2) rad s(-1)) but a reduction at lower frequencies (omega approximate to 10(-2) rad s(-1)), with the response being largely insensitive to the relative layer thicknesses. The increased capacity at high frequencies was due to increased ion mobility across the electrodes caused by the layering, allowing diffusion limitations of identical homogeneous electrodes to be overcome. These results imply the suitability of layered electrodes for applications with highly dynamic charge profiles and/or relatively thick electrodes.
Keyword:
Supercapacitors
Electric double layer structured electrodes
Electrochemical modelling
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
7.9
论文数:
3.7W
被引数:
15.0W
机构
引用论文
分享收藏Spray deposition of steam treated and functionalized single-walled and multi-walled carbon nanotube films for supercapacitors.png)
nanotechnology
nanotechnologyIF2.8
PREAI
分享收藏OPTIMIZATION OF POROSITY AND THICKNESS OF A BATTERY ELECTRODE BY MEANS OF A REACTION-ZONE MODEL通过反应区模型优化电池电极的孔隙率和厚度
PREAI
分享收藏Low-order mathematical modelling of electric double layer supercapacitors using spectral methodsOAAI
OAAI分享收藏
查看更多内容