Premium
A numerical study on ion concentration polarization and electric circuit performance of an electrokinetic battery
Author(s) -
Jiao Yanmei,
Zhao Cunlu,
Yang Chun,
Kang Yuejun,
Gao Xiumin,
Wang Hui,
Song Linhui,
He Bin
Publication year - 2020
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.201900466
Subject(s) - electrokinetic phenomena , dimensionless quantity , materials science , voltage , polarization (electrochemistry) , debye length , amplitude , ion , current density , analytical chemistry (journal) , charge density , mechanics , chemistry , nanotechnology , physics , electrical engineering , optics , engineering , chromatography , organic chemistry , quantum mechanics
Ion concentration polarization (ICP) imposes remarkable adverse effects on the energy conversion performance of the pressure‐driven electrokinetic (EK) flows through a capillary system that can be equivalently treated as a battery. An optimized dimensionless numerical method is proposed in this study to investigate the causes and the effects of the ICP. Results show that remarkable ICP phenomena are induced under certain conditions such as high applied pressure, high surface charge density, and small inversed Debye length at dimensionless values of 6000, ‒10, and 0.5. Meanwhile, different factors influence the ICP and the corresponding electric properties in different ways. Particularly for the overall electric resistance, the applied pressure and the surface charge density mainly affect the variation amplitude and the level of the overall electric resistance when varying the output electric potential, respectively. Differently, the Debye length affects the overall electric resistance in both aspects. Ultimately, the induced ICP leads to significant nonlinear current–potential curves.