Volume 131, Number 4, August 2020
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||01 September 2020|
A continuum study of ionic layer analysis for single species ion transport in coaxial carbon nanotubes
Institute for Advanced Study, Shenzhen University - Nanshan District Shenzhen, Guangdong 518060, PRC
Received: 23 May 2020
Accepted: 1 August 2020
In this letter, we employ the Poisson-Nernst-Planck equation and the continuum molecular model to investigate the ionic layers formation in coaxial carbon nanotubes, which are crucial for understanding the ion transport in nanomaterials, as well as modern solar cells and batteries. Owing to the curvature of nanotubes and the strong ion-nanotubes interactions, our simulations show that stable ionic multi-layers can always be formed inside nanotubes under a wide range of external electric fields and operating temperatures. Approximate solutions have also been deduced to support our numerical results. Most importantly, our hybrid model enjoys rapid and efficient computational times and hence fluid flow, conductivity and VI curve can be extracted almost instantaneously, which opens up a new research direction for the ion transport in nanomaterials.
PACS: 66.10.-x – Diffusion and ionic conduction in liquids / 87.10.Ed – Ordinary differential equations (ODE), partial differential equations (PDE), integrodifferential models / 87.10.Tf – Molecular dynamics simulation
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